Merge pull request #27 from kristianwind/ics-alldays-for-dated-tasks

Fix: date-only tasks now appear in a subscribed calendar (ICS)

.gitea/ISSUE_TEMPLATE/bug.yml

@@ -0,0 +1,46 @@
+name: Bug
+# Gitea kalder feltet `about`, hvor GitHub kalder det `description`, og Gitea
+# *kræver* det: en skabelon uden bliver afvist frem for at blive vist. Derfor
+# ligger skabelonerne her for sig frem for at være delt med `.github/`.
+about: Something does not work
+labels: [bug]
+body:
+  - type: textarea
+    id: what
+    attributes:
+      label: What happened
+      description: And what you expected instead.
+    validations:
+      required: true
+  - type: textarea
+    id: steps
+    attributes:
+      label: How to reproduce it
+      placeholder: |
+        1. …
+        2. …
+    validations:
+      required: true
+  - type: input
+    id: version
+    attributes:
+      label: Version
+      description: The image tag, or the commit you built from.
+    validations:
+      required: true
+  - type: dropdown
+    id: how
+    attributes:
+      label: How are you running it
+      options:
+        - As a Rune in Yggdrasil Panel
+        - Docker directly
+        - From source
+    validations:
+      required: true
+  - type: textarea
+    id: logs
+    attributes:
+      label: Anything in the logs
+      description: Please remove tokens and email addresses first.
+      render: text

.gitea/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Security issue
+    url: https://gitea.nolimit.dk/kw/verdande/src/branch/main/SECURITY.md
+    about: Please report vulnerabilities by email, not as a public issue.

.gitea/ISSUE_TEMPLATE/feature.yml

@@ -0,0 +1,24 @@
+name: Feature
+about: Suggest something
+labels: [enhancement]
+body:
+  - type: markdown
+    attributes:
+      # Absolut adresse, ikke GitHubs `../../blob/main/…`: Gitea lægger en fil
+      # under `/src/branch/<gren>/`, så den relative form peger ingen steder her.
+      value: |
+        Please check the [non-goals](https://gitea.nolimit.dk/kw/verdande/src/branch/main/README.md#non-goals)
+        first — some things are deliberately not being built.
+  - type: textarea
+    id: problem
+    attributes:
+      label: What are you trying to do
+      description: The problem, not the solution. What does the current version make hard?
+    validations:
+      required: true
+  - type: textarea
+    id: idea
+    attributes:
+      label: What you had in mind
+    validations:
+      required: false

.gitea/workflows/ci.yml

@@ -0,0 +1,273 @@
+name: CI
+
+# Gitea-tvillingen til .github/workflows/ci.yml. Den prøver at nå samme resultat
+# ad en anden vej, og forskellen er hele pointen med filen:
+#
+# INGEN `uses:`. Gitea Actions kan læse GitHubs format, men `DEFAULT_ACTIONS_URL`
+# står ikke i app.ini på gitea.nolimit.dk, og standarden er github.com — så et
+# `uses: actions/checkout@v4` her ville blive hentet FRA GitHub, hver gang, også
+# selvom både koden, runneren og registret er vores egne. Et workflow, der bruger
+# markedspladsen, er derfor ikke uafhængigt af GitHub; det ser bare sådan ud.
+#
+# Prisen er, at værktøjskæden skal komme et sted fra. Den kommer fra jobbets
+# container, hvilket er billigere end det lyder: `container: golang:1.26` er
+# nøjagtig det, setup-go ellers ville bruge et trin på at installere.
+#
+# Alternativerne, hvis nogen senere vil skrive filen om: sæt DEFAULT_ACTIONS_URL
+# til gitea.com, som spejler de gængse handlinger — men det flytter kun
+# afhængigheden fra én andens server til en andens, og det er en indstilling for
+# HELE instansen, altså også for alt andet, der bygger der. Denne fil rører kun
+# dette repo.
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+  # Så en kørsel kan udløses uden at skulle opfinde en commit. Det er ikke
+  # bekvemmelighed: uden den er den eneste måde at få CI til at køre igen mod
+  # uændret kode at skubbe noget tomt, og en tom commit i historikken er en
+  # løgn om, at der skete noget.
+  workflow_dispatch:
+
+# Ingen `concurrency:`-blok. GitHub-udgaven aflyser en kørsel, når en nyere
+# kommer, og det er stadig det rigtige at gøre — men understøttelsen kom sent til
+# Gitea Actions, og et felt, runneren ikke kender, er en fejl ved oversættelsen
+# frem for en ignoreret linje. Den kan sættes på, når instansen er en version,
+# der kan.
+
+jobs:
+  go:
+    name: Go
+    runs-on: ubuntu-latest
+    # Containeren ER værktøjskæden. `-race` kræver en C-oversætter, og den er med
+    # i det officielle golang-image — et slankere ville koste et apt-trin.
+    container:
+      image: golang:1.26
+    steps:
+      - name: Checkout
+        env:
+          TOKEN: ${{ secrets.GITEA_TOKEN }}
+        run: |
+          set -eu
+          # Håndrullet, fordi actions/checkout ville blive hentet fra GitHub.
+          # Det er de samme fire greb, den handling tager: init, remote, en
+          # fetch af præcis den commit, der udløste kørslen, og et checkout.
+          #
+          # Legitimationen sættes med -c på selve fetch-kommandoen frem for i
+          # remotens adresse. En adresse med token i havner i .git/config, i
+          # `git remote -v` og i enhver fejlbesked, der citerer den; en header
+          # gør ikke.
+          git config --global --add safe.directory '*'
+          git init -q .
+          git remote add origin "$GITHUB_SERVER_URL/$GITHUB_REPOSITORY.git"
+          # To former for basic auth, fordi kun en kørende runner kan svare på,
+          # hvilken Gitea tager imod. actions/checkout bruger x-access-token, og
+          # det er den, økosystemet beviser virker; $GITHUB_ACTOR er reserven.
+          # Løkken skriver, hvilken der blev godkendt — så ÉN kørsel besvarer
+          # spørgsmålet, uanset om den ender grøn eller rød. Feedback-sløjfen her
+          # går gennem en kø og et andet menneske; at bruge en hel runde på at få
+          # ét bit at vide er for dyrt.
+          godkendt=
+          for bruger in x-access-token "$GITHUB_ACTOR"; do
+            header="Authorization: Basic $(printf '%s:%s' "$bruger" "$TOKEN" | base64 | tr -d '\n')"
+            if git -c http.extraheader="$header" fetch -q --depth=1 origin "$GITHUB_SHA"; then
+              godkendt=$bruger
+              break
+            fi
+          done
+          if [ -z "$godkendt" ]; then
+            echo "checkout: hverken x-access-token eller $GITHUB_ACTOR blev accepteret"
+            exit 1
+          fi
+          echo "checkout: godkendt som $godkendt"
+          git checkout -q FETCH_HEAD
+
+      - name: Formatting
+        run: |
+          unformatted=$(gofmt -l .)
+          if [ -n "$unformatted" ]; then
+            echo "These files are not gofmt'd:"
+            echo "$unformatted"
+            exit 1
+          fi
+
+      - name: Vet
+        run: go vet ./...
+
+      # -race is the whole point of running tests in CI for a server with a
+      # WebSocket fan-out: a data race is exactly the bug that passes locally.
+      - name: Test
+        run: go test -race -count=1 ./...
+
+      - name: Build
+        run: CGO_ENABLED=0 go build ./...
+
+  spec:
+    name: OpenAPI is valid
+    runs-on: ubuntu-latest
+    container:
+      image: node:22
+    steps:
+      - name: Checkout
+        env:
+          TOKEN: ${{ secrets.GITEA_TOKEN }}
+        run: |
+          set -eu
+          git config --global --add safe.directory '*'
+          git init -q .
+          git remote add origin "$GITHUB_SERVER_URL/$GITHUB_REPOSITORY.git"
+          # To former for basic auth, fordi kun en kørende runner kan svare på,
+          # hvilken Gitea tager imod. actions/checkout bruger x-access-token, og
+          # det er den, økosystemet beviser virker; $GITHUB_ACTOR er reserven.
+          # Løkken skriver, hvilken der blev godkendt — så ÉN kørsel besvarer
+          # spørgsmålet, uanset om den ender grøn eller rød. Feedback-sløjfen her
+          # går gennem en kø og et andet menneske; at bruge en hel runde på at få
+          # ét bit at vide er for dyrt.
+          godkendt=
+          for bruger in x-access-token "$GITHUB_ACTOR"; do
+            header="Authorization: Basic $(printf '%s:%s' "$bruger" "$TOKEN" | base64 | tr -d '\n')"
+            if git -c http.extraheader="$header" fetch -q --depth=1 origin "$GITHUB_SHA"; then
+              godkendt=$bruger
+              break
+            fi
+          done
+          if [ -z "$godkendt" ]; then
+            echo "checkout: hverken x-access-token eller $GITHUB_ACTOR blev accepteret"
+            exit 1
+          fi
+          echo "checkout: godkendt som $godkendt"
+          git checkout -q FETCH_HEAD
+
+      # Structural validity only. That the spec matches the *router* is checked by
+      # a Go test, which is the half that actually goes stale.
+      - run: npx --yes @redocly/cli@latest lint docs/openapi.yaml
+
+  e2e:
+    name: End-to-end
+    runs-on: ubuntu-latest
+    # node frem for golang her: Playwrights browsere trækker et lag
+    # Debian-pakker, som npm-imaget er vant til at have, mens Go til gengæld er
+    # fire linjer at hælde ind. Den anden vej rundt er den dyre.
+    container:
+      image: node:22
+    steps:
+      - name: Checkout
+        env:
+          TOKEN: ${{ secrets.GITEA_TOKEN }}
+        run: |
+          set -eu
+          git config --global --add safe.directory '*'
+          git init -q .
+          git remote add origin "$GITHUB_SERVER_URL/$GITHUB_REPOSITORY.git"
+          # To former for basic auth, fordi kun en kørende runner kan svare på,
+          # hvilken Gitea tager imod. actions/checkout bruger x-access-token, og
+          # det er den, økosystemet beviser virker; $GITHUB_ACTOR er reserven.
+          # Løkken skriver, hvilken der blev godkendt — så ÉN kørsel besvarer
+          # spørgsmålet, uanset om den ender grøn eller rød. Feedback-sløjfen her
+          # går gennem en kø og et andet menneske; at bruge en hel runde på at få
+          # ét bit at vide er for dyrt.
+          godkendt=
+          for bruger in x-access-token "$GITHUB_ACTOR"; do
+            header="Authorization: Basic $(printf '%s:%s' "$bruger" "$TOKEN" | base64 | tr -d '\n')"
+            if git -c http.extraheader="$header" fetch -q --depth=1 origin "$GITHUB_SHA"; then
+              godkendt=$bruger
+              break
+            fi
+          done
+          if [ -z "$godkendt" ]; then
+            echo "checkout: hverken x-access-token eller $GITHUB_ACTOR blev accepteret"
+            exit 1
+          fi
+          echo "checkout: godkendt som $godkendt"
+          git checkout -q FETCH_HEAD
+
+      - name: Go
+        run: |
+          set -eu
+          # Versionen læses ud af go.mod frem for at stå her. To steder at rette
+          # er ét for mange, og den slags glemmes lige indtil CI bygger med en
+          # anden Go end udviklerne.
+          version=$(awk '/^go /{print $2; exit}' go.mod)
+          arch=$(dpkg --print-architecture)
+          curl -fsSL "https://go.dev/dl/go${version}.linux-${arch}.tar.gz" | tar -xz -C /usr/local
+          echo /usr/local/go/bin >> "$GITHUB_PATH"
+
+      - name: Install
+        working-directory: web
+        run: npm ci --no-audit --no-fund
+
+      # Chromium for the suite, WebKit for one test.
+      #
+      # A smoke test exists to catch a build that does not work at all, and running
+      # the whole thing in three engines finds the same breakage three times for
+      # three times the cost. Focus is the exception, and it took a real report to
+      # learn it: Safari ignores `autofocus` on anything inserted after the page has
+      # loaded, so every inline form in the app opened with no cursor in it. WebKit
+      # here is the same engine Safari is, and `webkit-forms` in the Playwright
+      # config greps a single test out of the suite to run in it.
+      - name: Install browsers
+        working-directory: web
+        run: npx playwright install --with-deps chromium webkit
+
+      # The suite builds the frontend, embeds it and starts the real binary — see
+      # playwright.config.js. There is nothing to build here first.
+      - name: Test
+        working-directory: web
+        run: npm run test:e2e
+
+      # Ingen rapport at hente ned bagefter. GitHub-udgaven lægger
+      # web/playwright-report/ op som et artefakt, og det trin ER en handling fra
+      # markedspladsen — der er ikke en `run:`-form af det. Går suiten i stykker
+      # her, står grunden i loggen frem for i en zip. Skal rapporten tilbage, er
+      # det upload-artifact spejlet ind lokalt, ikke en linje mere i denne fil.
+
+  docker:
+    name: Docker image builds
+    runs-on: ubuntu-latest
+    # Ingen `container:` her: jobbet skal bruge docker-klienten og buildx, og dem
+    # har runnerens eget ubuntu-image. En golang- eller node-container ville have
+    # sproget og mangle værktøjet.
+    steps:
+      - name: Checkout
+        env:
+          TOKEN: ${{ secrets.GITEA_TOKEN }}
+        run: |
+          set -eu
+          git config --global --add safe.directory '*'
+          git init -q .
+          git remote add origin "$GITHUB_SERVER_URL/$GITHUB_REPOSITORY.git"
+          # To former for basic auth, fordi kun en kørende runner kan svare på,
+          # hvilken Gitea tager imod. actions/checkout bruger x-access-token, og
+          # det er den, økosystemet beviser virker; $GITHUB_ACTOR er reserven.
+          # Løkken skriver, hvilken der blev godkendt — så ÉN kørsel besvarer
+          # spørgsmålet, uanset om den ender grøn eller rød. Feedback-sløjfen her
+          # går gennem en kø og et andet menneske; at bruge en hel runde på at få
+          # ét bit at vide er for dyrt.
+          godkendt=
+          for bruger in x-access-token "$GITHUB_ACTOR"; do
+            header="Authorization: Basic $(printf '%s:%s' "$bruger" "$TOKEN" | base64 | tr -d '\n')"
+            if git -c http.extraheader="$header" fetch -q --depth=1 origin "$GITHUB_SHA"; then
+              godkendt=$bruger
+              break
+            fi
+          done
+          if [ -z "$godkendt" ]; then
+            echo "checkout: hverken x-access-token eller $GITHUB_ACTOR blev accepteret"
+            exit 1
+          fi
+          echo "checkout: godkendt som $godkendt"
+          git checkout -q FETCH_HEAD
+
+      # Build only — publishing happens on a tag, in release.yml. This job exists
+      # so a Dockerfile that no longer builds fails on the pull request rather
+      # than at release time.
+      #
+      # `type=cacheonly` frem for `--load`: resultatet skal ingen steder hen, og
+      # at hente et image ind i daemonen for straks at glemme det er et halvt
+      # minut hver kørsel. Én arkitektur er nok til at fange en Dockerfile, der
+      # ikke bygger; de to rigtige bygges på et mærkat.
+      - name: Build
+        run: |
+          set -eu
+          docker buildx create --use --name ci-verdande 2>/dev/null || docker buildx use ci-verdande
+          docker buildx build --platform linux/amd64 --output type=cacheonly .

.gitea/workflows/release.yml

@@ -0,0 +1,126 @@
+name: Release
+
+# Samme udløser som GitHub-workflowet: et semver-tag, og ikke andet.
+#
+# Gitea Actions læser samme format som GitHub Actions, men det er *ikke* det
+# samme sted. Filen ligger derfor for sig frem for at være delt: der er intet
+# `secrets.GITHUB_TOKEN`, registret er et andet, og der er ingen Releases-side at
+# skrive til. En delt fil ville være fire betingede led, der hver kun gælder ét
+# af de to steder.
+#
+# Og som i ci.yml: ingen `uses:`. Handlinger hentes fra github.com, så længe
+# DEFAULT_ACTIONS_URL ikke er sat — se den lange forklaring der.
+on:
+  push:
+    tags: ["v[0-9]+.[0-9]+.[0-9]+*"]
+
+jobs:
+  image:
+    name: Build and publish image
+    # `ubuntu-latest` er runnerens egen etiket (`ovh-1`, docker-mode). Ingen
+    # `container:`: jobbet skal bruge docker-klienten og buildx, og dem har
+    # runnerens image.
+    runs-on: ubuntu-latest
+    env:
+      REGISTRY: gitea.nolimit.dk
+    steps:
+      - name: Checkout
+        env:
+          TOKEN: ${{ secrets.GITEA_TOKEN }}
+        run: |
+          set -eu
+          git config --global --add safe.directory '*'
+          git init -q .
+          git remote add origin "$GITHUB_SERVER_URL/$GITHUB_REPOSITORY.git"
+          # To former for basic auth, fordi kun en kørende runner kan svare på,
+          # hvilken Gitea tager imod. actions/checkout bruger x-access-token, og
+          # det er den, økosystemet beviser virker; $GITHUB_ACTOR er reserven.
+          # Løkken skriver, hvilken der blev godkendt — så ÉN kørsel besvarer
+          # spørgsmålet, uanset om den ender grøn eller rød. Feedback-sløjfen her
+          # går gennem en kø og et andet menneske; at bruge en hel runde på at få
+          # ét bit at vide er for dyrt.
+          godkendt=
+          for bruger in x-access-token "$GITHUB_ACTOR"; do
+            header="Authorization: Basic $(printf '%s:%s' "$bruger" "$TOKEN" | base64 | tr -d '\n')"
+            if git -c http.extraheader="$header" fetch -q --depth=1 origin "$GITHUB_SHA"; then
+              godkendt=$bruger
+              break
+            fi
+          done
+          if [ -z "$godkendt" ]; then
+            echo "checkout: hverken x-access-token eller $GITHUB_ACTOR blev accepteret"
+            exit 1
+          fi
+          echo "checkout: godkendt som $godkendt"
+          git checkout -q FETCH_HEAD
+
+      # setup-qemu-action i rå form. Uden den bygger buildx kun værtens egen
+      # arkitektur, og arm64 er ikke valgfrit: et hjemmelab er lige så tit en
+      # Raspberry Pi eller en Apple silicon-VM som en x86-kasse.
+      - name: Emulation for the other architecture
+        run: docker run --privileged --rm tonistiigi/binfmt --install arm64,amd64
+
+      - name: Builder
+        run: docker buildx create --use --name release-verdande 2>/dev/null || docker buildx use release-verdande
+
+      # `GITEA_TOKEN` er automatisk til stede i et Actions-job og har lov at
+      # skrive pakker for den, der ejer repoet. Ingen hemmelighed at sætte op.
+      # --password-stdin frem for --password: det sidste ville stå i processens
+      # kommandolinje, som enhver på maskinen kan læse.
+      - name: Log in to the registry
+        env:
+          TOKEN: ${{ secrets.GITEA_TOKEN }}
+        run: printf '%s' "$TOKEN" | docker login "$REGISTRY" -u "$GITHUB_ACTOR" --password-stdin
+
+      # metadata-action i rå form.
+      #
+      # v1.4.2 udgiver 1.4.2, 1.4, 1 og latest — så en rune, der er bundet til
+      # :1, får rettelser uden nogensinde at krydse et hovedversionsskifte.
+      #
+      # En forudgivelse (v1.4.2-rc1) får KUN sit eget nøjagtige mærkat. At lade
+      # en rc overskrive :latest eller :1 ville sende den ud til alle, der troede
+      # de fulgte det stabile spor — og mærkatmønsteret ovenfor lukker dem ind.
+      - name: Work out the tags
+        id: tags
+        run: |
+          set -eu
+          version=${GITHUB_REF_NAME#v}
+          image="$REGISTRY/$GITHUB_REPOSITORY"
+          args="--tag $image:$version"
+          case "$version" in
+            *-*) echo "Forudgivelse: kun $version." ;;
+            *)
+              minor=${version%.*}
+              major=${version%%.*}
+              args="$args --tag $image:$minor --tag $image:$major --tag $image:latest"
+              ;;
+          esac
+          echo "args=$args" >> "$GITHUB_OUTPUT"
+          echo "Mærkater: $args"
+
+      - name: Build and push
+        run: |
+          set -eu
+          docker buildx build \
+            --platform linux/amd64,linux/arm64 \
+            --push \
+            ${{ steps.tags.outputs.args }} \
+            --build-arg "VERSION=$GITHUB_REF_NAME" \
+            --label "org.opencontainers.image.source=$GITHUB_SERVER_URL/$GITHUB_REPOSITORY" \
+            --label "org.opencontainers.image.version=$GITHUB_REF_NAME" \
+            --label "org.opencontainers.image.revision=$GITHUB_SHA" \
+            --label "org.opencontainers.image.created=$(date -u +%Y-%m-%dT%H:%M:%SZ)" \
+            .
+          # Ingen `cache-from: type=gha`. act_runner har en cache-tjeneste, der
+          # svarer på det navn, men den er ikke prøvet her, og en kold bygning,
+          # der tager nogle minutter længere, er billigere end en udgivelse, der
+          # fejler på noget, som ikke har med bygningen at gøre.
+
+    # Ingen Release oprettes.
+    #
+    # GitHub-workflowet laver en Release, fordi opdateringsnotitsen i appen læser
+    # `releases/latest` derfra. Gitea har sit eget Releases-begreb, men notitsen
+    # peger på GitHub — så en release her ville ingen læse. Skal notitsen flyttes
+    # med, er det `internal/update`, der skal have en ny adresse, og det er en
+    # ændring for sig. (Bemærk også, at GitHub-udgavens softprops-handling taler
+    # mod api.github.com og ikke kan genbruges her.)

.gitignore

@@ -67,5 +67,9 @@ node_modules.nosync/
 HANDOFF.md
 NOTES-PLAN.md
 
+# Samme grund: instruktionen til flytningen navngiver kassen, runneren, registret
+# og hvordan man kommer til dem. Arbejdspapir, ikke produktdokumentation.
+GITEA-FLYTNING.md
+
 # Agenternes arbejdstræer. Et git-repo inde i et git-repo, som ikke hører til her.
 .claude/worktrees/

NOTES-SPEC.md

@@ -0,0 +1,437 @@
+# Notes, as verdande builds them
+
+A description of one working notes system: the data model, the syntax, the search,
+the rendering contract, the import and export formats, and — more useful than any
+of it — the decisions that look arbitrary until you know what they cost.
+
+It is written to be lifted into another program. Nothing here depends on Go,
+SQLite or Svelte except where it says so; where an answer was forced by the tool,
+that is called out so you can pick a different one on purpose rather than by
+accident.
+
+---
+
+## Read this part first: what to ask before you build
+
+**This document is not a drop-in. It describes a notes system that lives inside a
+task app with projects, roles, a trash and a search box, and about a third of its
+design is inherited from that.** Lifting it into a program with different
+surroundings without deciding which parts to keep produces something that works
+for a week and then fights you.
+
+**If you are an assistant working from this file: ask these questions and get
+answers before writing code.** Do not guess a default. Each one changes what you
+build, not just how you build it.
+
+### About the surroundings
+
+1. **Does the host app already have a place to file things** — projects, folders,
+   notebooks, tags? verdande deliberately gave notes no hierarchy of their own and
+   filed them under the projects that already existed. If your app has nothing,
+   you need an answer for where a note lives, and "a folder tree" is the expensive
+   one.
+2. **Is there more than one person?** Sharing, roles and "who wrote this" run
+   through the whole model below. Single-user changes the schema and removes about
+   half the permission surface.
+3. **Is there already a trash, and does it expire?** Notes lean on one. Without
+   it, deleting is either permanent or you are building a trash.
+4. **Is there an existing full-text index?** The search here is FTS5-shaped. On
+   Postgres it is `tsvector`, on a client-side app it is probably a scan, and the
+   ranking section below changes accordingly.
+
+### About the notes themselves
+
+5. **Markdown, rich text, or blocks?** verdande stores Markdown and renders it.
+   That decision is defended below; it is also the one that most constrains
+   everything else.
+6. **Is the first line the title, or is there a title field?** Both work. Deriving
+   it means one less thing to keep in step and one less thing a person can leave
+   blank, and it forces the rule "the first line is a heading" on the editor.
+7. **What links to what?** `#project`, `[[note]]` and task references exist here
+   because the app has projects and tasks. Yours may have none of them, or others.
+8. **Do notes carry files?** Attachments bring content-type handling, a store, an
+   authorisation path and an XSS surface. Skipping them is a legitimate answer.
+
+### About scale and language
+
+9. **How many notes, realistically?** Several choices below flip at around ten
+   thousand: the list payload, the search fallback, rendering the whole list.
+10. **Which languages?** The folding described under *Search* is Danish. Every
+    language has its own version of that problem and the generic answer (strip
+    diacritics) is wrong for several of them.
+11. **Where does the text end up besides the screen?** Search indexes, AI
+    features, exports and backups each read it. Plaintext makes all of them cheap
+    and makes a stolen backup expensive — see *What is still open*.
+
+### About integration, specifically
+
+12. **Who owns the note's identity — you or the other system?** If notes will sync
+    with something else, ids and timestamps are the whole problem, and the
+    `updated_at` rule below becomes the first thing you have to change.
+13. **Is this a read of somebody else's notes, or the store of record?** A copy
+    needs conflict rules; a store of record needs export.
+14. **What happens to a note whose project, task or link target is deleted?**
+    Answered here as "the link goes dead and the note is untouched". If your host
+    app cascades instead, say so before the first delete.
+
+---
+
+## The shape of a note
+
+```
+id           an opaque string, unique
+project_id   nullable — where it is filed, or loose
+title        derived, never set by a caller
+body         Markdown, the whole note
+created_by   nullable — survives the account being deleted
+pinned       favourite; the list puts these first
+archived_at  nullable timestamp — put away, not thrown away
+deleted_at   nullable timestamp — the trash
+created_at
+updated_at
+```
+
+### Markdown in a column
+
+Not rich text, and not a format of our own.
+
+Export was a requirement before a line was written, and **if the stored form is
+the exported form there is no conversion left to lose anything in.** A note stays
+readable by any editor on the day the program is gone. It is also what makes
+search and anything an AI does over notes cheap: both read text.
+
+The cost is real and you should know it before choosing: everything the editor can
+do has to survive a round trip through Markdown, and anything Markdown cannot say,
+the editor must not offer. There is no place to hide a feature.
+
+### The title is the first line
+
+Always, and re-derived on every save — not "when it is empty".
+
+Derived once and then left alone, a title goes stale the moment somebody rewrites
+the opening of a note, and the list ends up calling a note by a name that is
+nowhere in it. **The column is a cache of the body, not a field beside it**, and no
+caller can set it, so every caller gets the same answer.
+
+This forces one editor rule: a new note opens on its title, and the first line is
+styled as a heading. Otherwise a note whose first line is a sentence is a note
+named by its first sentence.
+
+### Archive and trash are two different bits
+
+The trash says *this was a mistake, and in thirty days it is gone*. The archive
+says *this is finished, and I do not want to read past it.*
+
+A twelve-hundred-note import is exactly the case where most notes are worth
+keeping and almost none are worth looking at. Without an archive, the list is the
+whole archive forever, and finding this week's note means reading past a decade.
+
+Both are nullable timestamps rather than booleans: *when was this put away* answers
+questions a flag cannot, and it costs the same byte.
+
+---
+
+## Filing: no hierarchy of its own
+
+A note belongs to a project, or to nobody.
+
+The reasoning is worth repeating because it is easy to talk yourself out of:
+projects already exist, are already shared, already have roles, already have a
+trash. **A second hierarchy to file things in is one too many**, and a note filed
+under a project inherits every one of those answers instead of needing its own.
+
+- A note with a project: everybody who can read the project can read the note; an
+  editor can change it.
+- A note without one: the author's, and nobody else's.
+
+Sharing a note *is* filing it in a project. There is no access list of its own —
+a second way to give somebody access is a second place to get it wrong, and the
+two would disagree the day one of them changed.
+
+---
+
+## Links: three kinds, parsed out of the text
+
+The body is the truth. Links are an index over it, rebuilt on every save.
+
+| Syntax | Means | Notes |
+|---|---|---|
+| `#project` | a project | Same characters the task quick-add parser uses, on purpose |
+| `[[a note]]` | another note, by title | The spelling every note app has settled on |
+| `/opgave/<uuid>` or `task:<uuid>` | a task | What a link pasted out of the app carries |
+
+Patterns as used here:
+
+```
+project   (?:^|\s)#([\p{L}\p{N}_-]{1,64})
+note      \[\[([^\]\n]{1,200})\]\]
+task      (?:/opgave/|task:)([0-9a-fA-F-]{36})
+```
+
+Three decisions inside that table:
+
+- **`#Firma` in a note means the same project as `#Firma` in the task box.** Not a
+  second kind of tag that happens to look alike. That is the whole of "tag a note
+  and see it in the project".
+- **The link table is torn down and rebuilt on save, not diffed.** A body is small
+  and the set is small; a diff is a second description of the same fact, and it
+  can disagree with the text. That is the one thing this must never do.
+- **The target is not a foreign key.** A link to something deleted is a fact about
+  the note. It should read as a dead link rather than vanish, and it must not
+  block the delete.
+
+The index exists so the question can be asked **backwards**: *what has been written
+about this task?* Answering that by searching every note's prose would be too slow
+to leave a panel open on.
+
+---
+
+## Search
+
+Three layers, in the order they answer.
+
+### 1. Full-text, ranked
+
+FTS5 over `title`, `body` and a folded copy, with `unicode61 remove_diacritics 2`.
+
+Ranking is bm25 with **the title weighted ten times the body**. A word in the title
+is what the note is *about*; the same word once in a long body is a mention.
+
+This matters more than it sounds. Ordering by "last touched" is invisible with ten
+notes and useless with twelve hundred imported the same evening: searching "Tesla"
+answered with a note about nginx first and the note actually called "Tesla Model Y"
+second — which reads as a search that does not work, because from where the person
+is sitting it is one.
+
+### 2. Folding, for the language you are in
+
+`remove_diacritics` does not touch `ø`, `æ` or `å` — Unicode considers them
+letters in their own right, not accented forms. So a Dane cannot find "grøn" by
+typing "gron", which is how people type when the keyboard is not theirs.
+
+The answer here is a generated column carrying a transliterated copy:
+
+```
+ø,Ø → o     æ,Æ → ae     å,Å → aa
+```
+
+indexed alongside the body and **weighted the same as the body** — otherwise a
+folded match outranks an exact one.
+
+> **Ask, do not copy.** This mapping is Danish. German wants `ü → ue`, Swedish
+> disagrees with Danish about `ä`, and Turkish has a dotless `ı` that breaks
+> naive lowercasing entirely. Get the mapping from somebody who types the
+> language.
+
+### 3. A word inside a word
+
+An index is built of tokens, and a token is whatever the tokenizer decided was a
+word. `gamerule keepInventory true` is three of them, and the middle one is
+`keepinventory` — so a search for "keep inventory" asks for two words that are
+nowhere and gets nothing, while the note sits right there.
+
+A prefix query gets half of it: `keep*` matches, `inventory*` cannot, and the two
+are ANDed, so the half that works is thrown away by the half that cannot.
+
+**This is not exotic in a notes app.** A decade of notes is full of commands,
+identifiers and file names, and every one of them is several words the index
+thinks is one.
+
+So: the index answers first; when it has nothing, the text is read, and every term
+must appear somewhere in the note, in any word. A `LIKE '%term%'` over the folded
+column covers title, body and language folding at once.
+
+What it costs: a leading `%` cannot use an index, so it scans. At twelve hundred
+notes that is a few megabytes and a millisecond or two, and it only runs when the
+fast path already came back empty — which is exactly the search that was about to
+disappoint somebody. **At a hundred thousand notes it is the wrong shape**, and the
+answer then is a trigram index, not a bigger scan.
+
+It does not rank. There is no match to rank — that is the whole situation.
+
+---
+
+## The list, and why the body is empty in it
+
+A list showing a title and ninety characters of preview must not fetch whole
+notes. Twelve hundred notes came to 3.9 MB, of which 98 % was body nobody could
+see.
+
+The important half is *how* it is trimmed: **the body is emptied, not shortened.**
+
+A field called `body` holding a *piece* of the body is a trap. The editor opens
+it, the autosave pause writes it back, and the note is now cut down to its own
+excerpt — destroyed by nothing more than having been looked at. Send `preview` as
+its own field and leave `body` empty; the client sees the empty body and fetches
+the whole note.
+
+That costs one more separation, and it is not optional:
+
+> **Which row is selected and which note is loaded are two different things.**
+
+The editor loads its text when the note's id changes. Hand it the excerpt first
+and the whole note second and the id is the same both times — so the second one
+never renders, and somebody sits looking at a note that had a title a moment ago.
+
+Highlight the row immediately from the list; give the editor the note only when it
+is whole.
+
+Rendering cost, separately: with twelve hundred rows, first paint took 2.1 s. CSS
+`content-visibility: auto` with an intrinsic-size guess took it to 0.95 s with no
+virtual list, no scroll maths, and no list that can fall out of step with itself.
+Try that before building windowing.
+
+---
+
+## The editor contract
+
+Rich text on top, Markdown underneath, and a source view that shows the file.
+
+The supported subset — deliberately small, because everything in it has to survive
+the round trip:
+
+| Block | Markdown |
+|---|---|
+| Title | `# ` |
+| Heading | `## ` |
+| Subheading | `### ` |
+| Quote | `> ` |
+| Code block | ```` ``` ```` with an optional language |
+| Bullet and numbered lists | `- `, `1. `, nested |
+
+Inline: `**bold**`, `*italic*`, `~~strikethrough~~`, `` `code` ``, `<u>underline</u>`,
+and images as `![alt](url)`.
+
+Five rules that were each learned the hard way:
+
+1. **Every line becomes exactly one block.** Markdown normally joins consecutive
+   lines into a paragraph. Here it must not: the person typed a line and expects
+   to get it back, and an editor that silently reflows what somebody wrote is an
+   editor they stop trusting.
+2. **Load on id change, never while typing.** Writing to the editor's HTML puts
+   the caret back at the start, which mid-sentence is unusable.
+3. **One definition of what a code block contains.** A copy button inside the
+   `<pre>` and a syntax highlighter reading `textContent` will disagree, and the
+   difference ends up in the file — a click on "Copy" wrote the word *Copied* into
+   the code and the next save put it on disk. Have one function that says what a
+   block holds, used by the highlighter and the Markdown serialiser both.
+4. **A note that cannot be rendered must not take the pane with it.** One note
+   arriving in an unexpected shape threw inside the editor's reactive effect, and
+   from then on *no* note would open — the previous one just stayed on screen. Put
+   a guard around the render, fall back to showing the raw text, and let the rest
+   of the pane keep working.
+5. **Escaping between tags and escaping inside an attribute are different jobs.**
+   An escaper written for text between two tags handles `&`, `<`, `>` — and not
+   quotes, because between tags they are harmless. Inside an attribute they close
+   it. `![" onerror="alert(1)](…)` is the whole exploit.
+
+---
+
+## Attachments
+
+Images pasted or dragged into a note, stored content-addressed by hash, referenced
+from the body as ordinary Markdown images.
+
+The security shape, which is the part worth copying:
+
+- **Served as `application/octet-stream` with `nosniff` by default.** Attachments
+  are the one place a user supplies content another user opens. An uploaded SVG or
+  HTML file rendered inline runs its own script on your origin with the session
+  cookie attached.
+- **One exception, as a named allowlist:** a short list of raster image types
+  served inline as their exact type — `png`, `jpeg`, `gif`, `webp`, `avif`, `heic`.
+  A note carries its pictures in the text, and served as octet-stream every one of
+  them is a broken image.
+- **The list is named one type at a time, never matched on an `image/` prefix.**
+  The prefix lets `image/svg+xml` through, and an SVG is a document that can run
+  script.
+- **The stored path is checked against the files directory again at read time.** A
+  traversal that somehow got into the database must not become one that reads
+  `/etc/passwd`.
+- **Reaching an attachment follows the note, which follows its project.** Same
+  chain as everything else. Do not let a client hand you the parent id and take it
+  on trust.
+
+---
+
+## Import and export
+
+The same format both ways: **a zip of Markdown files**, one per note, with a YAML
+front matter block.
+
+```markdown
+---
+created: 2019-04-02T10:15:00Z
+modified: 2024-11-30T21:04:00Z
+---
+
+# Møde med Anders
+
+Han vil gerne have kaffe hver uge.
+```
+
+- `created` / `created_at` / `date` and `modified` / `updated` / `updated_at` are
+  all accepted on the way in. Obsidian and Bear write this block; so should you.
+- Images travel in the zip beside the notes, and the links in the text are
+  relative — **a note and its pictures must end up in the same archive**, which
+  matters the moment an export is split into parts.
+- File names collide: two notes called "Møde" are two notes, and a zip with one
+  entry twice is a zip that loses one.
+
+Limits that a real import taught, all of them cheap to add and expensive to omit:
+
+- A ceiling on the upload, on the number of entries, and on the **unpacked** size.
+  64 MB of zip expanded to 66 GB is a normal shape for an attack.
+- A per-file limit as well as a whole-archive budget: one enormous photograph and
+  ten thousand small ones are different attacks with the same ending.
+- The entry name is never used as a path. Store by hash; the name is only a key
+  for rewriting links.
+- **Count what you skip, and say so.** A note whose name contained an ellipsis was
+  dropped silently by a filter looking for `..` — one out of 1141, found only by
+  counting at both ends.
+
+### Timestamps on the way in
+
+An importer needs to write `created_at` and `updated_at` from the file, and the
+normal save path must refuse to let it.
+
+`updated_at` means *when did this program last write this note*. Let any caller set
+it and the column means whatever the last writer felt like. Give the importer its
+own narrow entry point instead, and say in the comment why it exists.
+
+Without those dates, a move of twelve hundred notes is a pile that was all written
+the same evening — and the order they were written in is half of what an archive
+is.
+
+---
+
+## What is still open here
+
+Written down because a specification that only lists what works is a specification
+that lies by omission.
+
+- **Note bodies are plaintext at rest.** They hold API keys and passwords, and
+  they are in every backup anybody can download. Encrypting them is bigger than it
+  sounds: the body is in the full-text index and the folded column is generated
+  from it, so both are a second plaintext copy in the same database. Encrypt and
+  both have to go, and search has to be rewritten to decrypt in application code —
+  fine at a thousand notes, a full scan per keystroke at ten thousand, at which
+  point the answer is a keyed index (an HMAC per word).
+- **Import never merges.** Every run creates new notes. Say so out loud in the UI.
+- **There is no sync.** Export and the API are the way out.
+
+---
+
+## A short list of the traps, for the person in a hurry
+
+1. A `body` field holding an excerpt will be saved over the real one.
+2. Selected row and loaded note are two different pieces of state.
+3. The title must be re-derived on every save or it goes stale.
+4. Diacritic stripping is not folding, and folding is language-specific.
+5. A tokenizer cannot see a word inside a word; decide what you do about it.
+6. An attachment served inline is a script on your origin unless you allowlist by
+   exact type and send `nosniff`.
+7. Escaping for text and escaping for attributes are different functions.
+8. One render failure must not be allowed to freeze the whole pane.
+9. An unpacked-size limit is not optional on an archive import.
+10. Let the importer set timestamps; let nobody else.

README.md

@@ -104,15 +104,21 @@ Apple Reminders, forward mail into it, and add it to Claude as a connector.
 | AI layer (Anthropic/OpenAI/Google/local) | Built, degrades when unconfigured |
 | Gmail: OAuth2 with PKCE, polling, one-way to tasks | Done, tested |
 | Google Calendar: read-only, laid over the task calendar | Built, never run against Google |
+| Calendar subscriptions: ICS and webcal, several per person | Done, tested |
+| Times on tasks, set by dragging in the week grid | Done, tested |
+| Notes: archive, grouped list, images, source view | Done, tested |
 | Update notice for administrators | Done, tested |
 | Personal API tokens | Done, tested |
 | OpenAPI 3.1 spec, checked against the router | Done, tested |
 | End-to-end smoke tests (Playwright) | Done |
 | Documentation, landing page, licence | Done |
 
-**Not finished:** Web Push, the AI providers, and the Gmail and Google Calendar
-API calls are implemented against their specifications and have only ever been
-exercised there, not against live services. Everything else has an interface: opening a task shows
+**Not finished:** Web Push, the AI providers and the Google Calendar API calls are
+implemented against their specifications and have only ever been exercised there,
+not against live services. Gmail is no longer in that list — it runs in production,
+including the flagging and de-duplication that took a day to get right. Calendar
+subscriptions over ICS and webcal are proven; the Google half of the calendar is
+not. Everything else has an interface: opening a task shows
 its description, sub-tasks, comments, files and reminders, and the settings pages
 cover the account, notifications, integrations, AI, API tokens, import, export and
 templates.

SECURITY.md

@@ -39,8 +39,28 @@ reply within a week.
 - **The CSP** is computed at startup by hashing the inline scripts in the built
   page, rather than allowing `unsafe-inline`.
 
+- **Note titles and bodies are sealed** under the same key, since 0027. Both, not
+  only the body: a note's title *is* its first line, so a readable title beside a
+  sealed body would leave the beginning of every note in the clear.
+
+  The two plaintext copies went with it. `notes_fts` indexed the body and the
+  generated `fold` column held a transliterated copy of it — sealing the body while
+  leaving those would have been theatre, since a stolen file could be read straight
+  out of the index. Search opens the text in Go instead, which costs 33–43 ms
+  across twelve hundred notes and is the wrong shape somewhere around ten thousand.
+- **Task titles, descriptions and comments are still in the clear**, and so is
+  `note_links` — ids derived from a note's body, so a stolen file still shows which
+  projects and tasks a note points at, though not what it says.
+
 ## What it does not do
 
-verdande has no rate limiting beyond the login and password-reset endpoints, and
-no audit log of reads. It is built to be run behind something — a Cloudflare
-Tunnel, a reverse proxy, a VPN — by somebody who knows what they exposed.
+Rate limiting covers the endpoints a stranger can reach: signing in, resetting a
+password, the second factor, the installation beacon, and inbound mail. **Nothing
+else is limited** — an authenticated caller can ask as often as they like, and a
+signed-in account that wanted to be a nuisance can be one.
+
+There is no audit log of reads. Who *changed* something is recorded per project;
+who looked at it is not.
+
+It is built to be run behind something — a Cloudflare Tunnel, a reverse proxy, a
+VPN — by somebody who knows what they exposed.

cmd/verdande/main.go

@@ -64,6 +64,22 @@ func run() error {
 	}
 	db.UseSecrets(box)
 
+	// Noter, der stadig ligger åbne, lukkes nu.
+	//
+	// Ved opstart og ikke efterhånden som de skrives: et arkiv på tolv hundrede
+	// importerede noter, som ingen redigerer igen, ville ellers aldrig blive
+	// forseglet — og det er præcis dét arkiv, der er værd at forsegle. Idempotent,
+	// så den koster et gennemløb af id'er hver anden gang.
+	//
+	// En fejl her stopper opstarten. Halvdelen af noterne lukket er ikke i stykker,
+	// men en instans, der starter og lader som om den beskytter noget, den ikke gør,
+	// er værre end en, der siger fra.
+	if sealed, err := db.SealNotes(context.Background()); err != nil {
+		return fmt.Errorf("seal notes: %w", err)
+	} else if sealed > 0 {
+		log.Info("notes sealed", "count", sealed)
+	}
+
 	httpapi.Version = version
 	api := httpapi.New(cfg, db, log, webAssets(log))
 

docs/caldav.md

@@ -1,9 +1,10 @@
 # Calendar and CalDAV
 
-Two ways to get your tasks into a calendar, one way to get a calendar into
-verdande, and none of the three is the same thing.
+Two ways to get your tasks into a calendar. Getting somebody else's calendar
+*into* verdande is the other direction and has its own page — see
+[Calendar](calendar.md).
 
-| | [Feed](#subscribing-to-a-feed) | [CalDAV](#connecting-a-caldav-client) | [Google Calendar](#showing-a-google-calendar-in-verdande) |
+| | [Feed](#subscribing-to-a-feed) | [CalDAV](#connecting-a-caldav-client) | [Calendars in](calendar.md) |
 |---|---|---|---|
 | Direction | Tasks out, read only | Tasks out, two-way | Events **in**, read only |
 | Works with | Anything that subscribes to a URL | Apple Reminders, Thunderbird, DAVx⁵ | A Google account |
@@ -42,39 +43,10 @@ most people actually keep.
 
 ## Showing a Google calendar in verdande
 
-The two sections above send your tasks *out*. This is the other direction: your
-Google calendar drawn underneath them, so one screen answers "what does this day
-already have in it".
+Moved. Connecting a Google account, subscribing to an address, and what the grid
+does with either now live on their own page — see [Calendar](calendar.md).
 
-**Settings → Integrations → Google Calendar → Connect**, then tick the calendars
-you want and press Save. They appear in **Calendar** in the sidebar, in Google's
-own colour for each one, beside your own tasks with due dates.
-
-It needs the same OAuth client Gmail uses, with the Calendar API enabled and the
-second redirect URI registered — see [Configuration](configuration.md#google).
-
-!!! warning "Read only"
-    verdande never writes to your Google calendar. An event cannot be dragged,
-    edited or ticked off here; clicking one opens it in Google, which is where it
-    can be changed. Your own tasks in the same grid still drag to another day as
-    they always have.
-
-    Writing would need the `calendar.events` scope and an answer to what should
-    happen when both sides moved the same meeting — which is a synchronisation
-    model rather than a scope, and it is deliberately not built yet.
-
-!!! note "The Internal client applies here too"
-    An OAuth client registered as *Internal* in a Google Workspace can only be
-    used by accounts in that workspace, calendars included. A personal
-    `@gmail.com` address is refused with `org_internal`. For one personal account
-    the shorter road is the calendar's own secret address: in Google Calendar,
-    **Settings → the calendar → Integrate calendar → Secret address in iCal
-    format**. Nothing in verdande subscribes to one yet — it is the next piece of
-    this feature.
-
-Events are kept for ninety days back and a year forward, refreshed every fifteen
-minutes and whenever you press **Fetch now**. Paging the grid past that window
-says so rather than showing an empty month.
+This page is the other direction: verdande's own tasks, read by something else.
 
 ## Connecting a CalDAV client
 

docs/calendar.md

@@ -0,0 +1,91 @@
+# Calendar
+
+Your dated tasks as a grid, with other people's calendars laid under them.
+
+**Calendar** in the menu shows a month or a week. The week is a day: hours down the
+side, and everything with a time on it in its place. Two things at ten o'clock sit
+beside each other, because that is a clash you should be able to see rather than
+read.
+
+## What is in it
+
+- **Your tasks**, on the day they are due — and at the time, if they have one.
+- **Events from calendars you have connected**, read-only.
+
+Drag a task to another day to move it. Drop it on the hour column and it takes that
+time; drop it in the band across the top and it keeps the day and loses the time.
+Events cannot be dragged: verdande holds a copy of somebody else's calendar, and a
+chip that lets itself be moved is a promise the server cannot keep.
+
+A project's own calendar is under **Calendar** on the project page, with the same
+week and month.
+
+## Subscribing to a calendar
+
+**Settings → Integrations → Subscriptions.** Paste an address and it is fetched at
+once.
+
+This works with anything that publishes an `.ics` file: public holidays, a club's
+fixtures, a shared calendar from work, your own calendar's secret address from
+Google, Apple or Fastmail.
+
+- **`webcal://` addresses work.** They are the same URL over https with a scheme
+  that makes a desktop hand it to the calendar app; it is rewritten for you.
+- **Several at a time.** Unlike the Google connection, which is one account, a
+  subscription is one address and you can have as many as you like.
+- **Read-only, refreshed every fifteen minutes.**
+- The address is fetched once before it is stored, so a typo tells you now rather
+  than by silently never filling.
+
+!!! note "This is the way in for a private account"
+    If the instance's Google registration is *Internal*, Google refuses accounts
+    from outside the organisation with `org_internal` — no setting on your side
+    changes that. Your calendar's own secret ICS address goes through this panel
+    and works regardless.
+
+## Connecting Google Calendar
+
+**Settings → Integrations → Google Calendar.** It shares the OAuth client Gmail
+uses, so the instance needs that registration first — see
+[Configuration](configuration.md#google).
+
+Two things have to be true in Google Cloud, and only the owner of the registration
+can do them:
+
+1. **Google Calendar API** is enabled for the project.
+2. The calendar callback is listed as an authorised redirect URI. The exact string
+   is printed in the panel — copy it from there rather than typing it. Google
+   compares it exactly: scheme, host, path, no trailing slash. `redirect_uri_mismatch`
+   almost always means one of those four differs.
+
+Once connected, tick the calendars you want to see. The list is refreshed on every
+sync, so a calendar added or renamed since last time appears under its new name.
+
+!!! warning "Written to the specification, not yet proven against Google"
+    The Google Calendar half is implemented from Google's documentation and tested
+    against a stand-in server. It has not been exercised against Google itself.
+    The subscription route above and the outgoing feed below have.
+
+## Your own calendar, elsewhere
+
+Two ways out, for two different jobs:
+
+- **[The ICS feed](caldav.md#subscribing-to-a-feed)** — a read-only address for Apple Calendar,
+  Google or Thunderbird. Your tasks appear as dated entries.
+- **[CalDAV](caldav.md)** — two-way. Tick something off in Apple Reminders and it
+  is ticked off here.
+
+The feed address is a credential in itself: anybody holding it can read your tasks
+without logging in, because a calendar client cannot sign in. Rotate it from
+**Settings → Integrations** if it gets out.
+
+## What it does not do
+
+- **It does not write to a connected calendar.** Events are a copy.
+- **It does not expand repeating events** from a subscribed file. A weekly meeting
+  in somebody else's calendar is stored as its first occurrence.
+- **It does not resolve named time zones** from a subscribed file. An event carrying
+  `TZID=Europe/Copenhagen` shows the clock the file wrote, rather than one this
+  server has moved.
+- **Only Google, and only reading**, for account connections. Everything else goes
+  through a subscription.

docs/configuration.md

@@ -12,6 +12,25 @@ nowhere to put one that the operator would ever see.
 | `VERDANDE_DATA_DIR` | `/data` | Database, uploaded files and backups. |
 | `VERDANDE_DEV` | `false` | Human-readable logs at debug level, and a relaxed origin check so a Vite dev server can connect. Never in production. |
 
+## Behind a proxy
+
+verdande keys its login rate limit and its audit log on the caller's address, so
+that address has to be one the caller cannot forge. A forwarded-for header is
+believed only when the machine that connected is a trusted proxy; a connection
+straight off the internet is keyed on the address it really came from.
+
+| Variable | Default | What it does |
+|---|---|---|
+| `VERDANDE_TRUSTED_PROXIES` | private networks | Whose `X-Forwarded-For` to believe, as comma-separated CIDRs. The default trusts loopback and the private ranges — the shape of a reverse proxy or tunnel sharing the host or the docker bridge. Set to `none` for an instance exposed directly with no proxy, so no forwarded header is ever believed. |
+| `VERDANDE_REAL_IP_HEADER` | `X-Forwarded-For` | The header the client address is read from, for a trusted proxy. |
+
+!!! warning "A proxy that does not overwrite the header"
+    The default is safe when your proxy replaces a client-supplied
+    `X-Forwarded-For` with the real address — nginx, Caddy and Cloudflare Tunnel all
+    do. If yours passes the client's own header through, narrow
+    `VERDANDE_TRUSTED_PROXIES` to just your proxy's address so a visitor cannot
+    choose the address they are rate-limited and logged as.
+
 ## Sessions and links
 
 | Variable | Default | What it does |

docs/notes.md

@@ -0,0 +1,163 @@
+# Notes
+
+Markdown in, Markdown out. Nothing in between.
+
+A note is written as rich text — headings, lists, quotations, code — and stored as
+the Markdown it looks like. That is not a detail about the database: it is what
+makes a note yours. Export gives you the same text you were looking at, and on the
+day this program is gone, every note opens in any editor.
+
+## Writing
+
+Start typing. **The first line is the title** — always, and re-derived every time
+you save, so a note you rewrite the top of is called by what it now says rather
+than by what it once did.
+
+| Style | Written as | Shortcut |
+|---|---|---|
+| Title | `# ` at the start of the line | pick it in **Aa** |
+| Heading | `## ` | |
+| Subheading | `### ` | |
+| Quote | `> ` | |
+| Code block | three backticks, with an optional language | |
+| Bullet and numbered lists | `- ` and `1. `, nested with Tab | |
+| Bold | two asterisks around the words | ⌘B |
+| Italic | one asterisk around the words | ⌘I |
+| Underline | a `u` tag around the words | ⌘U |
+| Strikethrough | two tildes around the words | |
+| Code | one backtick around the words | |
+
+Every line becomes exactly one block. Markdown would normally join consecutive
+lines into a paragraph; here it does not, because you typed a line and expect to
+get it back.
+
+Press the source button in the toolbar to see the note as the file it is. Edits there are edits to the
+note.
+
+### Pictures
+
+Paste one, or drag it onto the note. It is stored with the note and travels with
+it in an export. Every raster format works; SVG is stored but not shown inline —
+it is a document that can run script, and a note is not a place to run somebody
+else's.
+
+### Code blocks
+
+A fenced block is coloured for the language it names, and guesses when it does not.
+Each one carries a **Copy** button in its corner.
+
+## Linking
+
+Three kinds of reference, parsed out of the text as you write it:
+
+| You type | It means |
+|---|---|
+| `#Firma` | The project — the same `#Firma` quick add understands, not a second kind of tag |
+| `[[Møde med Anders]]` | Another note, by its title |
+| A pasted task link | That task |
+
+Links are an index over the text, rebuilt every time the note is saved. The text
+stays the truth.
+
+**The interesting direction is backwards.** A task shows what has been written
+about it, and a project shows the notes filed in it — without anybody having to
+remember to attach anything. Write `#Firma` in a note and it appears on that
+project's page.
+
+A link to something that has been deleted reads as a dead link. It is a fact about
+the note, and it should not vanish because something it mentioned did.
+
+## Filing and sharing
+
+A note belongs to a project, or to nobody.
+
+- **In a project:** everybody who can read the project can read the note, and an
+  editor can change it. Choose it under **Share in** at the foot of the note.
+- **In no project:** yours, and nobody else's.
+
+There is no folder tree. Projects, groups and labels already exist, are already
+shared and already have roles — a second hierarchy to file things in is one too
+many, and a note in a project inherits every one of those answers.
+
+## Finding
+
+The list groups itself: favourites first, then **Today**, **Yesterday**, **This
+week**, and then by month. Sort by created, last touched or name, and the grouping
+follows — sorted by name it groups by first letter instead.
+
+Search finds a word wherever it is:
+
+- **`gron` finds `grøn`.** Unicode does not consider `ø` an accented `o`, so
+  stripping diacritics is not enough for Danish. A folded copy of every note is
+  indexed beside the original.
+- **`inventory` finds `keepInventory`.** An index is built of whole words, and a
+  decade of notes is full of commands and identifiers that are several words in
+  one. When the index has nothing, the text itself is read.
+- Results are ranked by how well they match, with the title weighted ten times the
+  body. A word in the title is what the note is about; the same word once in a long
+  body is a mention.
+
+## Putting notes away
+
+Two different things, and the difference matters:
+
+- **Archive** — this is finished and I do not want to read past it. It stays
+  findable and comes back whenever you ask.
+- **Trash** — this was a mistake. It is gone in thirty days.
+
+Select several with ⌘-click and shift-click to archive or delete them together.
+
+## In and out
+
+**Export** gives you a zip of Markdown files, one per note, with the dates in a
+YAML front matter block that Obsidian and Bear also read:
+
+```markdown
+---
+created: 2019-04-02T10:15:00Z
+modified: 2024-11-30T21:04:00Z
+---
+
+# Møde med Anders
+
+Han vil gerne have kaffe hver uge.
+```
+
+**Import** takes the same shape back. Pictures travel in the zip beside the notes,
+and the links in the text are relative — so a note and its pictures must be in the
+same archive, which matters when a large export is split into parts.
+
+Two things to know before importing:
+
+- **Nothing is merged.** Every run creates new notes. Importing the same archive
+  twice gives you two of everything.
+- **The dates are read from the front matter.** Without them, a move of a thousand
+  notes is a pile that was all written the same evening — and the order they were
+  written in is half of what an archive is.
+
+### From Apple Notes
+
+`tools/apple-notes-til-markdown.py` in the repository exports Apple Notes to
+exactly this shape, front matter and pictures included. It is macOS-only, because
+Apple Notes is.
+
+For a large library, `tools/pak-noter-i-portioner.py` splits the export into
+uploadable parts, keeping each note with its own pictures.
+
+## What is encrypted, and what is not
+
+**A note's title and body are sealed** in the database, under a key kept in a file
+beside it rather than inside it. A backup you download does not carry the key, so
+it does not carry your notes.
+
+Both halves, not only the body: a note's title is its first line, so a readable
+title beside a sealed body would leave the beginning of every note in the open.
+
+**What is still in the clear:** task titles, descriptions and comments — and the
+list of what a note links to, so a stolen file shows which projects and tasks a
+note points at, though not what it says.
+
+Sealing the notes cost the search its index — a full-text index over a note's body
+is another copy of that body — so search reads the notes themselves now. At twelve
+hundred notes that is about forty milliseconds, and the box waits a quarter of a
+second after you stop typing, so you will not see it.

docs/openapi.yaml

@@ -2079,6 +2079,95 @@ paths:
         "404": { $ref: "#/components/responses/NotFound" }
         "422": { $ref: "#/components/responses/Validation" }
 
+  /api/v1/calendar/subscriptions:
+    post:
+      tags: [calendar]
+      summary: Subscribe to a calendar you only have an address to.
+      description: |
+        An ICS or `webcal://` address. Several per person, unlike the Google
+        connection, which is one — the address is the identity here, the way the
+        token is for OAuth.
+
+        The address is fetched once before it is stored: an address that cannot be
+        read is a typo far more often than a server that happens to be down, and
+        saying so while somebody is still looking at the field is worth two
+        seconds. `webcal://` is rewritten to `https://`, and the destination is
+        checked against the private-network wall both when it is written down and
+        again on the resolved address every time it is fetched.
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              type: object
+              required: [url]
+              properties:
+                url: { type: string, description: "https:// or webcal://" }
+                name:
+                  type: string
+                  description: Optional. The calendar's own name is used when this is empty.
+      responses:
+        "201":
+          description: Subscribed, and fetched once.
+        "422": { $ref: "#/components/responses/Validation" }
+
+  /api/v1/calendar/subscriptions/{id}:
+    parameters:
+      - { name: id, in: path, required: true, schema: { type: string } }
+    delete:
+      tags: [calendar]
+      summary: Stop subscribing. The cached events go with it.
+      responses:
+        "204": { description: Gone. }
+        "404": { $ref: "#/components/responses/NotFound" }
+
+  /api/v1/push/test:
+    post:
+      tags: [notifications]
+      summary: Send one notification to your own devices, and say what happened.
+      description: |
+        The answer to "no notifications arrive". A push that a service refuses is
+        the ordinary failure — a stale subscription, a browser that revoked
+        permission without telling the server — and every one of them looks
+        exactly like silence from the outside.
+
+        It goes through the same path a real notification takes, so what it proves
+        is the thing that has to work. The title and body come from the caller
+        because the dictionaries live in the interface.
+      requestBody:
+        required: false
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                title: { type: string, maxLength: 200 }
+                body: { type: string, maxLength: 500 }
+      responses:
+        "200":
+          description: What each device did with it.
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  subscriptions:
+                    type: integer
+                    description: Devices registered for this account.
+                  sent:
+                    type: integer
+                  failed:
+                    type: array
+                    items:
+                      type: object
+                      properties:
+                        service:
+                          type: string
+                          description: The push service's host — never the endpoint, which is a credential.
+                        reason:
+                          type: string
+                          description: What the service said.
+
   /api/v1/sections/{sectionID}:
     parameters:
       - { name: sectionID, in: path, required: true, schema: { type: string } }
@@ -2983,6 +3072,69 @@ paths:
         "204": { description: Deleted }
         "404": { $ref: "#/components/responses/NotFound" }
 
+  /api/v1/notes/{noteID}/shares:
+    parameters:
+      - name: noteID
+        in: path
+        required: true
+        schema: { type: string }
+    get:
+      tags: [notes]
+      summary: Who a note is shared with, and who it can be shared with.
+      description: >
+        Owner only. Returns the people the note is already shared with, each with
+        their role, and the candidates the owner may add — everyone on the instance
+        who is not already on the note.
+      responses:
+        "200":
+          description: OK
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  shares:
+                    type: array
+                    items: { $ref: "#/components/schemas/NoteShare" }
+                  candidates:
+                    type: array
+                    items: { $ref: "#/components/schemas/Person" }
+        "404": { $ref: "#/components/responses/NotFound" }
+    post:
+      tags: [notes]
+      summary: Share a note with a person, or change the role they hold.
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              type: object
+              required: [user_id]
+              properties:
+                user_id: { type: string }
+                role: { type: string, enum: [viewer, editor] }
+      responses:
+        "204": { description: Shared }
+        "404": { $ref: "#/components/responses/NotFound" }
+        "422": { $ref: "#/components/responses/Validation" }
+
+  /api/v1/notes/{noteID}/shares/{userID}:
+    delete:
+      tags: [notes]
+      summary: Take a person's access to a note away again.
+      parameters:
+        - name: noteID
+          in: path
+          required: true
+          schema: { type: string }
+        - name: userID
+          in: path
+          required: true
+          schema: { type: string }
+      responses:
+        "204": { description: Unshared }
+        "404": { $ref: "#/components/responses/NotFound" }
+
   /api/v1/notes/linking/{kind}/{targetID}:
     get:
       tags: [notes]
@@ -3818,6 +3970,14 @@ components:
         pinned: { type: boolean }
         created_at: { type: string, format: date-time }
         updated_at: { type: string, format: date-time }
+        shared_with_me:
+          type: boolean
+          description: >
+            True when the reader reached this note through a direct share rather
+            than by owning it or its project. What puts it in the Delt med mig group.
+        owner:
+          allOf: [{ $ref: "#/components/schemas/Person" }]
+          description: Who the note belongs to, present on a note shared with the reader.
         links:
           type: array
           description: What the body points at, read out of the text on the way in.
@@ -3834,6 +3994,21 @@ components:
         body: { type: string, description: "Markdown. Its first line becomes the title." }
         pinned: { type: boolean }
 
+    Person:
+      type: object
+      description: A user, as much of one as a name and a colour.
+      properties:
+        id: { type: string }
+        name: { type: string }
+        avatar_color: { type: string }
+
+    NoteShare:
+      type: object
+      description: One person's direct grant on a note.
+      properties:
+        user: { $ref: "#/components/schemas/Person" }
+        role: { type: string, enum: [viewer, editor] }
+
     Mailbox:
       type: object
       description: One connected mailbox. The password and any token are never returned.

docs/rune.md

@@ -7,14 +7,14 @@ verdande ships with a Rune manifest for
 
 ```
 create container: Error response from daemon:
-No such image: ghcr.io/kristianwind/verdande:latest
+No such image: gitea.nolimit.dk/kw/verdande:latest
 ```
 
 This message is a liar. It does not mean the tag is missing from the registry —
 it means the image is not on the host, and the panel's attempt to fetch it failed
 without saying so.
 
-The usual cause is a **private** GHCR package. Yggdrasil pulls anonymously: its
+The usual cause is a **private** package. Yggdrasil pulls anonymously: its
 `PullImage` calls the Docker SDK with no `RegistryAuth`, so a private image comes
 back 401. The pull error is discarded, and `ContainerCreate` — which only ever
 looks locally — then reports the image as missing.
@@ -24,10 +24,28 @@ looks locally — then reports the image as missing.
     sends them itself with each request. Yggdrasil is a different client and
     sends none, so logging in changes nothing for the panel.
 
-**Make the package public.** Under
-[Packages → verdande → Package settings](https://github.com/users/kristianwind/packages/container/package/verdande)
-→ *Change visibility*. The repository stays private; only the built image becomes
-readable, which is what the manifest and these pages have always assumed.
+**The package has to be readable without credentials**, and the only way to know
+is to ask the registry for a token as a stranger:
+
+```bash
+curl -s "https://ghcr.io/token?scope=repository:kristianwind/verdande:pull&service=ghcr.io"
+```
+
+A 200 with a `token` in it means anyone can pull, which means the panel can. A
+401 means it cannot, whatever the package page says.
+
+!!! danger "Do not test this with `docker --config /tmp/empty pull`"
+    It looks like the honest test and is not. An empty config directory does not
+    stop the machine's credential helper, so the pull is quietly authenticated
+    with credentials you forgot you had — and reports success for an image no
+    stranger can fetch. This cost a production instance an hour of downtime: the
+    image was declared public on that evidence, the rune was pointed at it, and
+    the host — which had never logged in — could not pull a thing.
+
+    A self-hosted Gitea is where this bites. An instance with `REQUIRE_SIGNIN_VIEW`
+    turned on refuses anonymous tokens for its registry too, and no per-package
+    setting overrides it. Making the source repository public does not change it
+    either; that was tried.
 
 Once it is public, press **Start** on the server you already have. There is no
 need to delete it and make another: the image reference is read from the rune at
@@ -37,8 +55,8 @@ To keep the package private you have to put the image on the host yourself,
 before creating the server, and again after every release:
 
 ```bash
-sudo docker login ghcr.io -u kristianwind
-sudo docker pull ghcr.io/kristianwind/verdande:latest
+sudo docker login gitea.nolimit.dk -u kw
+sudo docker pull gitea.nolimit.dk/kw/verdande:latest
 ```
 
 Run it as the user the Docker daemon runs as — `sudo` if the panel does. The

docs/self-hosting.md

@@ -6,9 +6,10 @@ cache, no queue and no second process.
 ## Docker
 
 !!! note "If the pull is refused"
-    The GHCR package is public, so this needs no credentials. If it is ever set
-    back to private, `docker login ghcr.io` with a token carrying the
-    `read:packages` scope before pulling — and see
+    The image is published from a self-hosted Gitea and is readable without
+    credentials — the package is not linked to a repository, so its visibility
+    follows the account rather than the (private) source repo. If it is ever set
+    back to private, `docker login gitea.nolimit.dk` before pulling — and see
     [the Rune page](rune.md#if-the-image-will-not-pull), because a private image
     fails differently and much more confusingly under Yggdrasil.
 

internal/ai/ai.go

@@ -47,6 +47,12 @@ type Config struct {
 	// ProviderCompatible and useful for a proxy in front of the others.
 	BaseURL string
 	Model   string
+	// AllowPrivate lets BaseURL be on this machine or its private network.
+	//
+	// Set by the caller from who is asking, never read from storage: it is the
+	// answer to "may this person reach the LAN", and that answer can change after
+	// the address was saved. See the handler for who gets it and why.
+	AllowPrivate bool
 }
 
 func (c Config) Configured() bool {
@@ -73,13 +79,17 @@ type Client struct {
 }
 
 func New(cfg Config) *Client {
+	dial := safedial.Client
+	if cfg.AllowPrivate {
+		dial = safedial.AllowPrivate
+	}
 	return &Client{
 		cfg: cfg,
 		// Generous: a local model on modest hardware can take a while to produce
 		// its first token, and the alternative is a timeout that only ever fires
 		// for the people running their own.
-		// safedial, not a plain client. `base_url` is typed into a field in the
-		// interface, so it is a user-supplied address — and a server that fetches a
+		// safedial by default. `base_url` is typed into a field in the interface,
+		// so it is a user-supplied address — and a server that fetches a
 		// user-supplied address is a way to ask it to reach things the caller
 		// cannot: the panel next door, a database on the same bridge, the cloud
 		// metadata endpoint. On a homelab that is most of what is worth reaching.
@@ -87,7 +97,13 @@ func New(cfg Config) *Client {
 		// The check is on the resolved address rather than on the URL, because a
 		// name answers whatever its owner says — and can answer differently the
 		// second time, after a parse-time check has passed.
-		http: safedial.Client(120 * time.Second),
+		//
+		// And then the exception, which is the whole reason this provider exists:
+		// a model you run yourself IS on that network. Blocking it made the two
+		// lines above true and the feature useless — the comment about a local
+		// model being slow to its first token was written for a case the dialler
+		// refused to reach. AllowPrivate is granted per request, not per address.
+		http: dial(120 * time.Second),
 	}
 }
 

internal/auth/auth_test.go

@@ -265,6 +265,39 @@ func TestRecoveryCodes(t *testing.T) {
 	}
 }
 
+// TOTPStep returns the step a code matched, and it must be the same step across
+// the tolerance window — that number is what makes a code single-use, so a code
+// entered a little early or late has to spend the same step, not a new one.
+func TestTOTPStepIsStableAcrossTheWindow(t *testing.T) {
+	secret, _, err := NewTOTPSecret("verdande", "k@example.com")
+	if err != nil {
+		t.Fatal(err)
+	}
+	now := time.Date(2026, 3, 10, 10, 0, 15, 0, time.UTC)
+	code := codeAt(t, secret, now)
+
+	want, err := TOTPStep(secret, code, now)
+	if err != nil {
+		t.Fatalf("the current code did not match: %v", err)
+	}
+	// Verified one step late — the code is still valid, and must report the step it
+	// was issued at, not the step it was checked at.
+	got, err := TOTPStep(secret, code, now.Add(30*time.Second))
+	if err != nil {
+		t.Fatalf("code rejected one step late: %v", err)
+	}
+	if got != want {
+		t.Errorf("same code reported step %d then %d; a replay check keyed on that would not catch it", want, got)
+	}
+
+	if _, err := TOTPStep(secret, "000000", now); err == nil {
+		t.Error("a wrong code returned a step")
+	}
+	if _, err := TOTPStep("", code, now); err != ErrNoTOTPSecret {
+		t.Errorf("empty secret: %v, want ErrNoTOTPSecret", err)
+	}
+}
+
 // codeAt produces the code an authenticator app would display at that moment,
 // using the same settings VerifyTOTP checks against.
 func codeAt(t *testing.T, secret string, now time.Time) string {

internal/auth/totp.go

@@ -2,6 +2,7 @@ package auth
 
 import (
 	"crypto/rand"
+	"crypto/subtle"
 	"encoding/base32"
 	"errors"
 	"fmt"
@@ -82,6 +83,40 @@ func VerifyTOTP(secret, code string, now time.Time) error {
 	return nil
 }
 
+// TOTPStep verifies a code and returns the counter of the step it matched, so the
+// caller can refuse to accept the same step twice.
+//
+// ValidateCustom answers only yes or no, and "yes" for a code inside the skew
+// window is not enough to stop a replay: a code seen in flight stays valid for the
+// rest of its period, and the fix is to record which step was spent and never
+// accept that step or an earlier one again. That needs the number, so this walks
+// the same window ValidateCustom would — one step either side — and reports the
+// counter of the match. The comparison is constant time for the same reason the
+// password check is: a code is a secret being checked against a computed value.
+func TOTPStep(secret, code string, now time.Time) (int64, error) {
+	if secret == "" {
+		return 0, ErrNoTOTPSecret
+	}
+	code = strings.ReplaceAll(strings.TrimSpace(code), " ", "")
+
+	for offset := -int64(totpSkew); offset <= int64(totpSkew); offset++ {
+		at := now.Add(time.Duration(offset) * totpPeriod * time.Second)
+		want, err := totp.GenerateCodeCustom(secret, at, totp.ValidateOpts{
+			Period:    totpPeriod,
+			Skew:      0,
+			Digits:    totpDigits,
+			Algorithm: otp.AlgorithmSHA1,
+		})
+		if err != nil {
+			return 0, ErrInvalidCode
+		}
+		if subtle.ConstantTimeCompare([]byte(want), []byte(code)) == 1 {
+			return at.Unix() / totpPeriod, nil
+		}
+	}
+	return 0, ErrInvalidCode
+}
+
 // NewRecoveryCodes returns single-use codes for someone who has lost their phone,
 // and the hashes to store. Without these, losing a device means losing the account,
 // and the only fix left is editing the database by hand.

internal/config/config.go

@@ -7,6 +7,7 @@ package config
 
 import (
 	"fmt"
+	"net/netip"
 	"os"
 	"path/filepath"
 	"strconv"
@@ -80,6 +81,26 @@ type Config struct {
 	// TrashRetention is how long a soft-deleted task or project stays recoverable.
 	TrashRetention time.Duration
 
+	// TrustedProxies are the peers whose forwarded-for header may be believed.
+	//
+	// The rate limiter and the audit log key on the caller's address, and that
+	// address is only as honest as wherever it was read. Read it from a header that
+	// anybody can set, and an attacker rotates it to get a fresh guess-bucket for
+	// every request and to write someone else's IP into the log. So the header is
+	// believed only when the machine that *connected* is one of these — a reverse
+	// proxy or tunnel the operator put there — and ignored when the connection came
+	// straight off the internet.
+	//
+	// The default is "the peer is on a private network", which is exactly the shape
+	// of a homelab behind Caddy, nginx or a Cloudflare Tunnel: the proxy shares the
+	// host or the docker bridge, so its address is loopback or RFC1918. A directly
+	// exposed instance sees a public peer, trusts nothing, and keys on the real
+	// connection. Override with VERDANDE_TRUSTED_PROXIES (comma-separated CIDRs),
+	// or "none" to trust no proxy at all.
+	TrustedProxies []netip.Prefix
+	// RealIPHeader is where the client address is read from, for a trusted peer.
+	RealIPHeader string
+
 	Dev bool
 }
 
@@ -149,9 +170,70 @@ func Load() (*Config, error) {
 	if c.DataDir, err = filepath.Abs(c.DataDir); err != nil {
 		return nil, fmt.Errorf("VERDANDE_DATA_DIR: %w", err)
 	}
+
+	c.RealIPHeader = env("VERDANDE_REAL_IP_HEADER", "X-Forwarded-For")
+	if c.TrustedProxies, err = parseTrustedProxies(env("VERDANDE_TRUSTED_PROXIES", "")); err != nil {
+		return nil, err
+	}
 	return c, nil
 }
 
+// defaultTrustedProxies is "the peer is not on the public internet": loopback,
+// the three RFC1918 ranges, Tailscale's CGNAT borrow, IPv6 unique-local and both
+// families' link-local. A proxy an operator stands up in front of this server is
+// on one of these; a stranger connecting directly is on none.
+var defaultTrustedProxies = mustPrefixes(
+	"127.0.0.0/8", "::1/128",
+	"10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16",
+	"100.64.0.0/10",
+	"fc00::/7",
+	"169.254.0.0/16", "fe80::/10",
+)
+
+// parseTrustedProxies reads the override. Empty keeps the private-network default;
+// the literal "none" trusts no proxy at all, for an instance that is exposed
+// directly and must never believe a forwarded header.
+func parseTrustedProxies(raw string) ([]netip.Prefix, error) {
+	raw = strings.TrimSpace(raw)
+	if raw == "" {
+		return defaultTrustedProxies, nil
+	}
+	if strings.EqualFold(raw, "none") {
+		return nil, nil
+	}
+	var out []netip.Prefix
+	for _, part := range strings.Split(raw, ",") {
+		part = strings.TrimSpace(part)
+		if part == "" {
+			continue
+		}
+		// A bare address is a host route: 10.0.0.5 means 10.0.0.5/32, so an operator
+		// naming one proxy does not have to know CIDR notation to do it.
+		if !strings.Contains(part, "/") {
+			addr, err := netip.ParseAddr(part)
+			if err != nil {
+				return nil, fmt.Errorf("VERDANDE_TRUSTED_PROXIES: %q is not an address or CIDR", part)
+			}
+			out = append(out, netip.PrefixFrom(addr, addr.BitLen()))
+			continue
+		}
+		p, err := netip.ParsePrefix(part)
+		if err != nil {
+			return nil, fmt.Errorf("VERDANDE_TRUSTED_PROXIES: %q is not a CIDR", part)
+		}
+		out = append(out, p.Masked())
+	}
+	return out, nil
+}
+
+func mustPrefixes(cidrs ...string) []netip.Prefix {
+	out := make([]netip.Prefix, 0, len(cidrs))
+	for _, c := range cidrs {
+		out = append(out, netip.MustParsePrefix(c))
+	}
+	return out
+}
+
 // DBPath, FilesDir and BackupsDir are the three things that live on the /data volume.
 func (c *Config) DBPath() string     { return filepath.Join(c.DataDir, "verdande.db") }
 func (c *Config) FilesDir() string   { return filepath.Join(c.DataDir, "files") }

internal/httpapi/auth_handlers.go

@@ -218,7 +218,24 @@ func (s *Server) handleLoginTOTP(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	err := auth.VerifyTOTP(user.TOTPSecret, req.Code, time.Now())
+	step, err := auth.TOTPStep(user.TOTPSecret, req.Code, time.Now())
+	if err == nil {
+		// The code is right; now it must also be unused. A TOTP code stays valid for
+		// its whole window, so one observed in flight — a phishing page, a proxy,
+		// over the shoulder — could otherwise be replayed until it expires. Spending
+		// the step here makes it single-use: a second presentation of the same code,
+		// or an earlier one, finds the step already gone.
+		fresh, cerr := s.db.ConsumeTOTPStep(r.Context(), user.ID, step)
+		if cerr != nil {
+			s.internal(w, r, "consume totp step", cerr)
+			return
+		}
+		if !fresh {
+			writeError(w, http.StatusUnauthorized, CodeUnauthorized,
+				"that verification code has already been used")
+			return
+		}
+	}
 	if err != nil {
 		// A recovery code is accepted in the same field. Making somebody find a
 		// different form while locked out of their account is a poor time to

internal/httpapi/auth_test.go

@@ -27,6 +27,9 @@ type testServer struct {
 	*httptest.Server
 	db     *store.DB
 	client *http.Client
+	// api er den samme server, routeren hænger på. Et par prøver har brug for at
+	// nå ind i den — se `icsFetch` — og uden den her er der kun håndtaget udefra.
+	api *Server
 }
 
 func newTestServer(t *testing.T) *testServer {
@@ -62,7 +65,8 @@ func newTestServerWith(t *testing.T, configure func(*config.Config)) *testServer
 	// Discard: a passing test should print nothing, and these handlers log freely.
 	log := slog.New(slog.NewTextHandler(io.Discard, nil))
 
-	srv := httptest.NewServer(New(cfg, db, log, nil))
+	api := New(cfg, db, log, nil)
+	srv := httptest.NewServer(api)
 	t.Cleanup(srv.Close)
 
 	jar, err := cookiejar.New(nil)
@@ -75,6 +79,7 @@ func newTestServerWith(t *testing.T, configure func(*config.Config)) *testServer
 		// The cookie jar is what makes this a session test rather than a
 		// sequence of unrelated requests.
 		client: &http.Client{Jar: jar, Timeout: 10 * time.Second},
+		api:    api,
 	}
 }
 
@@ -367,6 +372,50 @@ func TestTOTPEnrolmentAndTwoStepLogin(t *testing.T) {
 	}
 }
 
+// A TOTP code works once. A code seen in flight and replayed inside its window
+// must be refused the second time, or the second factor is only as good as the
+// thirty seconds an attacker has to reuse what they captured.
+func TestTOTPCodeIsSingleUse(t *testing.T) {
+	ts := newTestServer(t)
+	ts.bootstrap(t)
+
+	resp, body := ts.do(t, "POST", "/api/v1/auth/totp/setup", map[string]string{
+		"password": "et langt kodeord",
+	})
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("totp setup: %d %v", resp.StatusCode, body)
+	}
+	secret, _ := body["secret"].(string)
+	resp, body = ts.do(t, "POST", "/api/v1/auth/totp/confirm", map[string]string{
+		"code": codeFor(t, secret),
+	})
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("totp confirm: %d %v", resp.StatusCode, body)
+	}
+
+	// One code, captured once and presented twice.
+	code := codeFor(t, secret)
+
+	ts.do(t, "POST", "/api/v1/auth/logout", nil)
+	ts.do(t, "POST", "/api/v1/auth/login", map[string]string{
+		"email": "kristian@example.dk", "password": "et langt kodeord",
+	})
+	resp, body = ts.do(t, "POST", "/api/v1/auth/login/totp", map[string]string{"code": code})
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("first use of the code failed: %d %v", resp.StatusCode, body)
+	}
+
+	// A second login, same code, same window.
+	ts.do(t, "POST", "/api/v1/auth/logout", nil)
+	ts.do(t, "POST", "/api/v1/auth/login", map[string]string{
+		"email": "kristian@example.dk", "password": "et langt kodeord",
+	})
+	resp, body = ts.do(t, "POST", "/api/v1/auth/login/totp", map[string]string{"code": code})
+	if resp.StatusCode != http.StatusUnauthorized {
+		t.Fatalf("the same code was accepted twice: %d %v", resp.StatusCode, body)
+	}
+}
+
 // A recovery code is accepted in the same field as a TOTP code, and works once.
 func TestRecoveryCodeCompletesLoginOnce(t *testing.T) {
 	ts := newTestServer(t)

internal/httpapi/calendar_handlers.go

@@ -3,10 +3,17 @@ package httpapi
 import (
 	"context"
 	"errors"
+	"fmt"
+	"io"
 	"net/http"
+	"strings"
 	"time"
 
+	"github.com/go-chi/chi/v5"
+
 	"github.com/kristianwind/verdande/internal/gcal"
+	"github.com/kristianwind/verdande/internal/ics"
+	"github.com/kristianwind/verdande/internal/safedial"
 	"github.com/kristianwind/verdande/internal/store"
 )
 
@@ -205,9 +212,21 @@ type calendarStatusJSON struct {
 	// ReadOnly is stated rather than assumed. Nothing writes a Google calendar, and
 	// an interface that quietly looks editable is one somebody will try to edit.
 	ReadOnly bool `json:"read_only"`
+
+	// Abonnementer står ved siden af Google-kontoen og ikke inde i den: man kan
+	// have det ene uden det andet, og det er hele pointen med dem — en privat
+	// konto, der ikke kan bruge en Internal OAuth-klient, kan abonnere.
+	Subscriptions []store.CalendarAccount `json:"subscriptions"`
 }
 
 func (s *Server) handleGetCalendar(w http.ResponseWriter, r *http.Request) {
+	// Læst først, så de også kommer med, når der ingen Google-konto er.
+	subscriptions, err := s.db.Subscriptions(r.Context(), userFrom(r.Context()).ID)
+	if err != nil {
+		s.internal(w, r, "subscriptions", err)
+		return
+	}
+
 	user := userFrom(r.Context())
 
 	out := calendarStatusJSON{
@@ -223,6 +242,7 @@ func (s *Server) handleGetCalendar(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if account == nil || account.RefreshToken == "" {
+		out.Subscriptions = subscriptions
 		writeJSON(w, http.StatusOK, out)
 		return
 	}
@@ -253,6 +273,7 @@ func (s *Server) handleGetCalendar(w http.ResponseWriter, r *http.Request) {
 	if calendars != nil {
 		out.Calendars = calendars
 	}
+	out.Subscriptions = subscriptions
 	writeJSON(w, http.StatusOK, out)
 }
 
@@ -383,12 +404,23 @@ func (s *Server) handleCalendarSyncNow(w http.ResponseWriter, r *http.Request) {
 // Returns how many events were written. Also used by the background job, which is
 // why it takes a context and a user rather than a request.
 func (s *Server) SyncCalendars(ctx context.Context, user *store.User) (int, error) {
+	// Abonnementer først, og deres fejl tæller ikke mod Google.
+	//
+	// De to har intet med hinanden at gøre ud over at ende samme sted: et
+	// abonnement er en adresse, der hentes, hvor Google er et token, der udløber.
+	// En kalender, hvis vært er nede, må ikke få det til at se ud som om
+	// Google-forbindelsen er væk — og omvendt.
+	written, err := s.syncSubscriptions(ctx, user)
+	if err != nil {
+		s.log.Warn("calendar subscriptions", "err", err, "user", user.ID)
+	}
+
 	account, err := s.db.CalendarAccountFor(ctx, user.ID, calendarProviderName)
 	if err != nil {
-		return 0, err
+		return written, err
 	}
 	if account == nil || account.RefreshToken == "" {
-		return 0, nil // not connected; nothing to do and nothing to complain about
+		return written, nil // not connected; nothing to do and nothing to complain about
 	}
 
 	// The same guard the mailboxes have, for the same reason: a press of "fetch
@@ -414,7 +446,6 @@ func (s *Server) SyncCalendars(ctx context.Context, user *store.User) (int, erro
 	}
 
 	from, to := calendarWindow(time.Now())
-	written := 0
 	for _, calendar := range calendars {
 		if !calendar.Shown {
 			continue
@@ -546,3 +577,232 @@ func validDay(s string) bool {
 	_, err := time.Parse(calendarDateLayout, s)
 	return err == nil
 }
+
+// --- abonnementer -----------------------------------------------------------------
+
+// maxICSBytes bounds one fetch. A published calendar of a decade of holidays is a
+// few hundred kilobytes; ten megabytes is not a calendar, and reading it into
+// memory on a schedule with nobody watching is how a homelab instance falls over
+// at three in the morning.
+const maxICSBytes = 10 << 20
+
+// normaliseCalendarURL turns what somebody pastes into something that can be
+// fetched.
+//
+// `webcal://` is not a scheme anything speaks. It is a convention — the same URL
+// over https, with a scheme that makes a desktop hand it to the calendar app
+// instead of the browser — and every publisher writes their links that way. A
+// person pasting one has pasted the right address; refusing it would be refusing
+// them on a technicality.
+func normaliseCalendarURL(raw string) (string, error) {
+	raw = strings.TrimSpace(raw)
+	if after, ok := strings.CutPrefix(raw, "webcal://"); ok {
+		raw = "https://" + after
+	}
+	if !strings.HasPrefix(raw, "https://") && !strings.HasPrefix(raw, "http://") {
+		return "", errors.New("must be an https:// or webcal:// address")
+	}
+	// The same wall the AI provider's base_url goes through, and for the same
+	// reason: this is an address a user typed, and the server is about to fetch it
+	// on a schedule of their choosing.
+	if reason := safedial.CheckURL(raw); reason != "" {
+		return "", errors.New(reason)
+	}
+	return raw, nil
+}
+
+// icsClient is the client a subscribed calendar is fetched with.
+//
+// safedial, checked on the *resolved* address at connect time and on every
+// redirect hop — because a name that passed the check when it was pasted can
+// answer 127.0.0.1 when the sweep runs at three in the morning.
+//
+// The field exists so a test can put an ordinary client here: httptest listens on
+// loopback, which is exactly what this refuses, so a test of the *format* cannot
+// otherwise reach its own server. It is never set outside a test, and the wall it
+// bypasses is tested where it belongs — `normaliseCalendarURL` refuses a private
+// address where it is written down, and `internal/push` proves the connect-time
+// half.
+func (s *Server) icsClient() *http.Client {
+	if s.icsFetch != nil {
+		return s.icsFetch
+	}
+	return safedial.Client(30 * time.Second)
+}
+
+// fetchICS reads a subscribed calendar.
+//
+// safedial, not a plain client — checked on the resolved address at connect time
+// and on every redirect hop, because a name that passed the check when it was
+// pasted can answer 127.0.0.1 when the sweep runs at three in the morning.
+func (s *Server) fetchICS(ctx context.Context, url string) (ics.Subscribed, error) {
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
+	if err != nil {
+		return ics.Subscribed{}, err
+	}
+	req.Header.Set("Accept", "text/calendar, text/plain;q=0.9, */*;q=0.5")
+	req.Header.Set("User-Agent", "verdande/"+Version)
+
+	resp, err := s.icsClient().Do(req)
+	if err != nil {
+		return ics.Subscribed{}, err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode >= 300 {
+		return ics.Subscribed{}, fmt.Errorf("%s said %s", resp.Request.URL.Host, resp.Status)
+	}
+
+	body, err := io.ReadAll(io.LimitReader(resp.Body, maxICSBytes+1))
+	if err != nil {
+		return ics.Subscribed{}, err
+	}
+	if len(body) > maxICSBytes {
+		return ics.Subscribed{}, errors.New("that calendar is too large")
+	}
+	return ics.ParseCalendar(string(body)), nil
+}
+
+// syncSubscriptions refreshes every calendar this person subscribes to by address.
+//
+// One failing address does not stop the others. A subscription is somebody else's
+// server, and the ordinary state of somebody else's server is that it is fine
+// until one morning it is not — a holiday feed that 404s must not take the
+// football club's fixtures down with it.
+func (s *Server) syncSubscriptions(ctx context.Context, user *store.User) (int, error) {
+	subs, err := s.db.Subscriptions(ctx, user.ID)
+	if err != nil || len(subs) == 0 {
+		return 0, err
+	}
+
+	from, to := calendarWindow(time.Now())
+	written := 0
+	var failures []string
+
+	for _, sub := range subs {
+		if ctx.Err() != nil {
+			return written, ctx.Err()
+		}
+		unlock := s.lockSync("calendar:" + sub.ID)
+
+		calendarID, err := s.db.SubscribedCalendarID(ctx, sub.ID)
+		if err != nil {
+			unlock()
+			failures = append(failures, sub.URL)
+			continue
+		}
+
+		cal, err := s.fetchICS(ctx, sub.URL)
+		if err != nil {
+			unlock()
+			s.log.Warn("subscribed calendar", "err", err, "url", sub.URL, "user", user.ID)
+			failures = append(failures, sub.URL)
+			continue
+		}
+
+		// The name the file calls itself, once. A subscription is added under its
+		// address because that is all there is to go on before it has been fetched.
+		if err := s.db.RenameSubscribedCalendar(ctx, sub.ID, cal.Name); err != nil {
+			s.log.Warn("name subscribed calendar", "err", err)
+		}
+
+		rows := make([]store.CalendarEvent, 0, len(cal.Events))
+		for _, e := range cal.Events {
+			// Outside the window is not stored. The grid asks about a window, the
+			// sweep replaces a window, and a decade of holidays in one file would
+			// otherwise be a decade of rows rewritten every fifteen minutes.
+			if e.EndDay < from || e.StartDay > to {
+				continue
+			}
+			rows = append(rows, store.CalendarEvent{
+				RemoteID: e.UID, Summary: e.Summary, Location: e.Location, URL: e.URL,
+				StartsAt: e.StartsAt, EndsAt: e.EndsAt,
+				StartDay: e.StartDay, EndDay: e.EndDay, AllDay: e.AllDay,
+			})
+		}
+		if err := s.db.ReplaceCalendarEvents(ctx, calendarID, from, to, rows); err != nil {
+			unlock()
+			return written, err
+		}
+		if err := s.db.MarkCalendarSynced(ctx, sub.ID, time.Now()); err != nil {
+			s.log.Warn("mark subscription synced", "err", err)
+		}
+		written += len(rows)
+		unlock()
+	}
+
+	if len(failures) == len(subs) {
+		return written, fmt.Errorf("none of the %d subscribed calendars could be read", len(subs))
+	}
+	return written, nil
+}
+
+// handleSubscribeCalendar adds a calendar somebody only has an address to.
+//
+// Fetched once, here, before it is stored. An address that cannot be read is a
+// typo far more often than it is a server that happens to be down, and telling
+// somebody now — while they are looking at the field they just pasted into — is
+// worth the two seconds. A subscription that silently never fills is the same
+// silence the notifications had.
+func (s *Server) handleSubscribeCalendar(w http.ResponseWriter, r *http.Request) {
+	var req struct {
+		URL  string `json:"url"`
+		Name string `json:"name"`
+	}
+	if err := decodeJSON(w, r, &req); err != nil {
+		return
+	}
+
+	url, err := normaliseCalendarURL(req.URL)
+	if err != nil {
+		writeFieldErrors(w, map[string]string{"url": err.Error()})
+		return
+	}
+
+	user := userFrom(r.Context())
+	ctx, cancel := context.WithTimeout(r.Context(), 20*time.Second)
+	defer cancel()
+
+	cal, err := s.fetchICS(ctx, url)
+	if err != nil {
+		s.log.Warn("subscribe calendar", "err", err, "user", user.ID)
+		writeFieldErrors(w, map[string]string{"url": "that address could not be read"})
+		return
+	}
+
+	name := strings.TrimSpace(req.Name)
+	if name == "" {
+		name = strings.TrimSpace(cal.Name)
+	}
+	if name == "" {
+		name = url
+	}
+
+	account, err := s.db.SubscribeCalendar(r.Context(), user.ID, url, name)
+	if err != nil {
+		// The unique index is the one refusal worth naming: subscribing twice to
+		// the same address is the same calendar fetched twice, with no way to say
+		// which one counts.
+		if errors.Is(err, store.ErrDuplicate) {
+			writeFieldErrors(w, map[string]string{"url": "that calendar is already subscribed"})
+			return
+		}
+		s.storeError(w, r, "subscribe calendar", err)
+		return
+	}
+
+	// The events it already fetched, rather than making the person wait fifteen
+	// minutes for the sweep to prove it worked.
+	if _, err := s.syncSubscriptions(r.Context(), user); err != nil {
+		s.log.Warn("first subscription sync", "err", err)
+	}
+	writeJSON(w, http.StatusCreated, account)
+}
+
+func (s *Server) handleUnsubscribeCalendar(w http.ResponseWriter, r *http.Request) {
+	user := userFrom(r.Context())
+	if err := s.db.DeleteCalendarAccount(r.Context(), user.ID, chi.URLParam(r, "id")); err != nil {
+		s.storeError(w, r, "unsubscribe calendar", err)
+		return
+	}
+	w.WriteHeader(http.StatusNoContent)
+}

internal/httpapi/csp_header_test.go

@@ -3,6 +3,8 @@ package httpapi
 import (
 	"strings"
 	"testing"
+
+	"github.com/kristianwind/verdande/internal/config"
 )
 
 // Politikken skal stå i svaret, og den skal stadig være stram.
@@ -50,6 +52,39 @@ func TestEveryResponseCarriesAStrictCSP(t *testing.T) {
 	}
 }
 
+// HSTS følger med, når instansen kører over HTTPS — og kun der.
+//
+// Sessionen bor i en __Host-cookie, der kun findes over TLS, så hele modellen
+// forudsætter allerede HTTPS. HSTS er det, der holder den forudsætning mod en
+// netværksangriber; men bedt om over ren HTTP ville den bede en browser om at
+// kræve et certifikat, en dev-instans ikke har. Begge halvdele skal stå prøven.
+func TestHSTSTracksHTTPS(t *testing.T) {
+	overHTTP := newTestServer(t) // BaseURL er http://localhost
+	resp, _ := overHTTP.do(t, "GET", "/api/v1/ping", nil)
+	if got := resp.Header.Get("Strict-Transport-Security"); got != "" {
+		t.Errorf("HSTS sat over ren HTTP: %q", got)
+	}
+
+	overHTTPS := newTestServerWith(t, func(c *config.Config) {
+		c.BaseURL = "https://todo.example.dk"
+	})
+	resp, _ = overHTTPS.do(t, "GET", "/api/v1/ping", nil)
+	if got := resp.Header.Get("Strict-Transport-Security"); got == "" {
+		t.Error("ingen HSTS over HTTPS")
+	} else if !strings.Contains(got, "includeSubDomains") {
+		t.Errorf("HSTS uden includeSubDomains: %q", got)
+	}
+	// Permissions-Policy står på hvert svar, uanset skema: den lukker for kamera,
+	// mikrofon og placering, som appen aldrig beder om.
+	if got := resp.Header.Get("Permissions-Policy"); !strings.Contains(got, "camera=()") {
+		t.Errorf("Permissions-Policy lukker ikke for kameraet: %q", got)
+	}
+	// COOP isolerer browserkonteksten og står på hvert svar.
+	if got := resp.Header.Get("Cross-Origin-Opener-Policy"); got != "same-origin" {
+		t.Errorf("Cross-Origin-Opener-Policy er ikke same-origin: %q", got)
+	}
+}
+
 // Et bilag må ikke kunne blive læst som et dokument.
 func TestAttachmentsAreNotServedAsDocuments(t *testing.T) {
 	for _, mime := range []string{"image/svg+xml", "text/html", "application/xhtml+xml", "text/xml"} {

internal/httpapi/gmail_handlers.go

@@ -360,8 +360,19 @@ func (s *Server) SyncGmail(ctx context.Context, user *store.User) (int, error) {
 			Description: msg.Snippet + "\n\n" + msg.Link,
 			Priority:    4,
 			CreatedBy:   user.ID,
+			// The thread, not the message: a reply arriving later is the same
+			// conversation, and a second task for it would be the duplicate this
+			// key exists to prevent.
+			SourceKey: "gmail:thread:" + msg.ThreadID,
 		}
 		if err := s.db.CreateTask(ctx, task, nil); err != nil {
+			if errors.Is(err, store.ErrDuplicate) {
+				// Somebody got there first — an earlier sweep, or another
+				// assistant reading the same mailbox. Mark it seen and move on;
+				// it is handled, which is all this loop wanted.
+				seen[id] = true
+				continue
+			}
 			s.log.Warn("gmail create task", "err", err)
 			continue
 		}

internal/httpapi/integrations_handlers.go

@@ -215,20 +215,31 @@ func (s *Server) handleSetAISettings(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// The address is checked where it is typed, as well as when it is dialled.
+	// The address is checked where it is typed, as well as when it is dialled. A
+	// scheme other than http or https is refused outright, for everybody —
+	// file:// and gopher:// are not providers.
 	//
-	// safedial refuses a private destination at connect time and is the actual
-	// wall; this is so the person entering it hears about it now rather than
-	// discovering it later as a failed summary. A scheme other than http or https
-	// is refused outright — file:// and gopher:// are not providers.
+	// The private-network wall has one exception, and it is the point of the
+	// provider it guards. "OpenAI-compatible (Ollama, LM Studio, …)" means a model
+	// on this machine or on the desk beside it: 127.0.0.1:11434, 192.168.1.150.
+	// safedial refuses exactly those, so the address the field suggested in its
+	// own placeholder was an address the server would not accept.
+	//
+	// Admins only, because the wall is there for a real reason: a server that
+	// fetches a user-supplied address lets the person supplying it reach what
+	// they cannot reach themselves. An admin on a self-hosted instance already
+	// owns the host and everything on its network, so this grants them nothing
+	// new. An invited user is a different person, and for them it stays shut.
 	if url := strings.TrimSpace(req.BaseURL); url != "" {
 		if !strings.HasPrefix(url, "http://") && !strings.HasPrefix(url, "https://") {
 			writeFieldErrors(w, map[string]string{"base_url": "must start with http:// or https://"})
 			return
 		}
-		if reason := safedial.CheckURL(url); reason != "" {
-			writeFieldErrors(w, map[string]string{"base_url": reason})
-			return
+		if !user.IsAdmin {
+			if reason := safedial.CheckURL(url); reason != "" {
+				writeFieldErrors(w, map[string]string{"base_url": reason})
+				return
+			}
 		}
 		req.BaseURL = url
 	}
@@ -265,11 +276,20 @@ func (s *Server) aiConfig(r *http.Request, userID string) (ai.Config, error) {
 		v, _ := values[key].(string)
 		return v
 	}
+	// Worked out per request rather than stored beside the address: it answers
+	// "may this person reach the private network", and somebody who is no longer
+	// an admin should stop being able to. A flag written at save time would
+	// outlive the role that granted it.
+	allowPrivate := false
+	if u := userFrom(r.Context()); u != nil && u.IsAdmin {
+		allowPrivate = true
+	}
 	return ai.Config{
-		Provider: ai.Provider(str("provider")),
-		APIKey:   str("api_key"),
-		BaseURL:  str("base_url"),
-		Model:    str("model"),
+		Provider:     ai.Provider(str("provider")),
+		APIKey:       str("api_key"),
+		BaseURL:      str("base_url"),
+		Model:        str("model"),
+		AllowPrivate: allowPrivate,
 	}, nil
 }
 

internal/httpapi/integrations_test.go

@@ -2,13 +2,18 @@ package httpapi
 
 import (
 	"encoding/json"
+	"errors"
+	"fmt"
 	"io"
 	"net/http"
+	"net/http/httptest"
 	"net/url"
 	"strings"
 	"testing"
+	"time"
 
 	"github.com/kristianwind/verdande/internal/config"
+	"github.com/kristianwind/verdande/internal/store"
 )
 
 // --- MCP -----------------------------------------------------------------------------
@@ -714,6 +719,86 @@ func TestTheAIProviderSurvivesConnectingSomethingElse(t *testing.T) {
 	}
 }
 
+// Reported from use as "the AI settings are not saved" — the second time, and a
+// different cause than the one above.
+//
+// The provider is called "OpenAI-kompatibel (Ollama, LM Studio, …)" and the
+// address field suggests http://localhost:11434/v1. Both of those live on the
+// private network, which safedial refuses — so the address the interface proposed
+// was the address the server rejected, and the one provider that exists for
+// running your own model could not be configured at all.
+//
+// It looked like a save that did nothing, because the 422 came back on a field
+// with nowhere to show it. Two bugs wearing one coat.
+func TestAdminMayPointAIAtAModelOnTheLAN(t *testing.T) {
+	ts := newTestServer(t)
+	ts.bootstrap(t)
+
+	// The three shapes a self-hosted model actually takes: another machine on the
+	// LAN, the loopback name, and the loopback address.
+	for _, addr := range []string{
+		"http://192.168.1.150:8080/v1",
+		"http://localhost:11434/v1",
+		"http://127.0.0.1:1234/v1",
+	} {
+		resp, body := ts.do(t, "PUT", "/api/v1/ai/settings", map[string]any{
+			"provider": "compatible", "model": "gemma-4-26b-qat", "base_url": addr,
+		})
+		if resp.StatusCode != http.StatusNoContent {
+			t.Fatalf("save %s: status %d, body %v", addr, resp.StatusCode, body)
+		}
+	}
+
+	_, body := ts.do(t, "GET", "/api/v1/ai/settings", nil)
+	if body["base_url"] != "http://127.0.0.1:1234/v1" {
+		t.Errorf("base_url = %v after saving, want it to have survived", body["base_url"])
+	}
+	if body["provider"] != "compatible" {
+		t.Errorf("provider = %v", body["provider"])
+	}
+}
+
+// The wall stays up for everybody else.
+//
+// An admin on a self-hosted instance already owns the host and its network, so a
+// private destination grants them nothing they did not have. An invited user is a
+// different person, and for them the address field would be a way to find out
+// what answers on the host's network.
+func TestAnInvitedUserCannotPointAIAtThePrivateNetwork(t *testing.T) {
+	ts := newTestServer(t)
+	ts.bootstrap(t)
+	other := ts.newUser(t, "andreas@example.dk", "Andreas")
+
+	resp, body := other.do(t, "PUT", "/api/v1/ai/settings", map[string]any{
+		"provider": "compatible", "model": "llama3.1",
+		"base_url": "http://192.168.1.150:8080/v1",
+	})
+	if resp.StatusCode == http.StatusNoContent {
+		t.Fatal("an invited user was allowed to point the AI at the private network")
+	}
+	fields, _ := body["fields"].(map[string]any)
+	if fields["base_url"] == nil {
+		t.Errorf("the refusal did not name the field it was about: %v", body)
+	}
+}
+
+// A scheme that is not http or https is refused for everybody, admin or not.
+func TestAISettingsRefuseANonHTTPAddress(t *testing.T) {
+	ts := newTestServer(t)
+	ts.bootstrap(t)
+
+	resp, body := ts.do(t, "PUT", "/api/v1/ai/settings", map[string]any{
+		"provider": "compatible", "model": "llama3.1", "base_url": "file:///etc/passwd",
+	})
+	if resp.StatusCode == http.StatusNoContent {
+		t.Fatal("file:// was accepted as a provider address")
+	}
+	fields, _ := body["fields"].(map[string]any)
+	if fields["base_url"] == nil {
+		t.Errorf("no error on base_url: %v", body)
+	}
+}
+
 func TestGmailSettings(t *testing.T) {
 	ts := newTestServer(t)
 	ts.bootstrap(t)
@@ -1468,3 +1553,172 @@ func TestTheMailAddressCanBeRotated(t *testing.T) {
 		t.Error("the second rotation returned the same address")
 	}
 }
+
+// "Der kommer ingen notifikationer" må kunne besvares.
+//
+// Alt om det var usynligt: indstillingssiden sagde "til for denne enhed", så snart
+// der fandtes et abonnement, og en push, tjenesten afviste, gik i en Debug-linje,
+// som ikke skrives på en instans, der kører på standardniveau. Man kunne ikke
+// skelne "browseren tilmeldte sig aldrig" fra "tjenesten afviste den" fra "der er
+// ikke noget forfaldent endnu" — tre forskellige problemer med ét udseende.
+func TestATestNotificationSaysWhatHappenedToIt(t *testing.T) {
+	ts := newTestServer(t)
+	ts.bootstrap(t)
+
+	// Ingen enheder: svaret skal sige nul frem for at lade som om det gik godt.
+	resp, body := ts.do(t, "POST", "/api/v1/push/test", map[string]any{
+		"title": "Prøve", "body": "kom den frem?",
+	})
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("status %d, body %v", resp.StatusCode, body)
+	}
+	if body["subscriptions"] != float64(0) {
+		t.Errorf("subscriptions = %v uden tilmeldte enheder", body["subscriptions"])
+	}
+
+	// En enhed, der peger på en tjeneste, som ikke findes. Den skal komme tilbage
+	// som et navngivent afslag og ikke som tavshed.
+	user, err := ts.db.UserByEmail(t.Context(), "kristian@example.dk")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := ts.db.SavePushSubscription(t.Context(), &store.PushSubscription{
+		UserID:   user.ID,
+		Endpoint: "https://push.example.invalid/abc",
+		P256dh:   "BEl62iUYgUivxIkv69yViEuiBIa-Ib9-SkvMeAtA3LFgDzkrxZJjSgSnfckjBJuBkr3qBUYIHBQFLXYp5Nksh8U",
+		Auth:     "aUZmY2xDS2FQUXJJVmJIeA",
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	_, body = ts.do(t, "POST", "/api/v1/push/test", map[string]any{"title": "Prøve"})
+	if body["subscriptions"] != float64(1) {
+		t.Fatalf("subscriptions = %v", body["subscriptions"])
+	}
+	failed, _ := body["failed"].([]any)
+	if len(failed) != 1 {
+		t.Fatalf("failed har %d poster, want 1 — afslaget blev slugt", len(failed))
+	}
+	first, _ := failed[0].(map[string]any)
+	if first["service"] != "push.example.invalid" {
+		t.Errorf("service = %v", first["service"])
+	}
+	if first["reason"] == "" || first["reason"] == nil {
+		t.Error("afslaget kom uden en grund")
+	}
+	// Og aldrig hele adressen: resten af den er den legitimation, tjenesten gav
+	// enheden, og den hører hverken i et svar, en log eller et skærmbillede.
+	if strings.Contains(fmt.Sprint(first), "/abc") {
+		t.Errorf("endepunktet lækkede med ud: %v", first)
+	}
+}
+
+// Et abonnement på en kalender, man kun har en adresse til.
+//
+// Bedt om som "abonnering af flere kalendere (ics og webcal?)". Google-vejen er
+// OAuth og én konto pr. person; det her er en adresse, og man har flere. Det er
+// også den eneste vej for en privat konto, som en Internal-registrering afviser
+// med `org_internal`.
+//
+// Prøven går uden om handleren og ind i det, den kalder. Grunden er væggen:
+// `httptest` lytter på loopback, og safedial nægter — både når adressen skrives
+// ned og igen når den hentes. Det er rigtigt, og det skal ikke kunne slås fra fra
+// en prøve. Så adressereglerne prøves for sig i TestWebcalIsRewrittenToHTTPS, og
+// her prøves resten af vejen: hentning, format, navn, gitteret og afmeldingen.
+func TestSubscribingToACalendarByAddress(t *testing.T) {
+	ts := newTestServer(t)
+	ts.bootstrap(t)
+
+	day := time.Now().AddDate(0, 0, 2).Format("20060102")
+	feedBody := "BEGIN:VCALENDAR\r\nVERSION:2.0\r\nX-WR-CALNAME:Helligdage\r\n" +
+		"BEGIN:VEVENT\r\nUID:en@example.dk\r\n" +
+		"DTSTART;VALUE=DATE:" + day + "\r\nDTEND;VALUE=DATE:" + day + "\r\n" +
+		"SUMMARY:Grundlovsdag\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n"
+
+	var hits int
+	feed := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		hits++
+		w.Header().Set("Content-Type", "text/calendar")
+		w.Write([]byte(feedBody))
+	}))
+	defer feed.Close()
+	ts.api.icsFetch = &http.Client{Timeout: 10 * time.Second}
+
+	user, err := ts.db.UserByEmail(t.Context(), "kristian@example.dk")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Tilføjet under sin adresse, som er alt der er at gå efter, før den er hentet.
+	if _, err := ts.db.SubscribeCalendar(t.Context(), user.ID, feed.URL, feed.URL); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := ts.api.syncSubscriptions(t.Context(), user); err != nil {
+		t.Fatal(err)
+	}
+	if hits == 0 {
+		t.Fatal("adressen blev aldrig hentet")
+	}
+
+	// Navnet kommer fra filen. X-WR-CALNAME er det, alle udgivere bruger; der
+	// findes ingen standardegenskab for det.
+	_, status := ts.do(t, "GET", "/api/v1/calendar", nil)
+	subs, _ := status["subscriptions"].([]any)
+	if len(subs) != 1 {
+		t.Fatalf("%d abonnementer i svaret", len(subs))
+	}
+	first, _ := subs[0].(map[string]any)
+	if first["account"] != "Helligdage" {
+		t.Errorf("navnet er %v, want Helligdage", first["account"])
+	}
+
+	// Og begivenheden står i gitteret.
+	from := time.Now().AddDate(0, 0, -1).Format("2006-01-02")
+	to := time.Now().AddDate(0, 0, 7).Format("2006-01-02")
+	_, events := ts.do(t, "GET", "/api/v1/calendar/events?from="+from+"&to="+to, nil)
+	list, _ := events["events"].([]any)
+	if len(list) != 1 {
+		t.Fatalf("%d begivenheder efter abonnementet", len(list))
+	}
+	if e, _ := list[0].(map[string]any); e["summary"] != "Grundlovsdag" {
+		t.Errorf("begivenheden er %v", e["summary"])
+	}
+
+	// Den samme adresse to gange er den samme kalender hentet to gange, og der er
+	// ingen måde at sige hvilken der gælder.
+	if _, err := ts.db.SubscribeCalendar(t.Context(), user.ID, feed.URL, ""); !errors.Is(err, store.ErrDuplicate) {
+		t.Errorf("den samme adresse blev accepteret to gange: %v", err)
+	}
+
+	// Fjernet igen, og begivenhederne går med.
+	resp, _ := ts.do(t, "DELETE", "/api/v1/calendar/subscriptions/"+first["id"].(string), nil)
+	if resp.StatusCode != http.StatusNoContent {
+		t.Fatalf("unsubscribe: status %d", resp.StatusCode)
+	}
+	_, events = ts.do(t, "GET", "/api/v1/calendar/events?from="+from+"&to="+to, nil)
+	if list, _ := events["events"].([]any); len(list) != 0 {
+		t.Errorf("%d begivenheder blev tilbage efter afmeldingen", len(list))
+	}
+}
+
+// webcal:// er https med et andet skema foran. Det er ikke en protokol, noget
+// taler — det er en konvention, der får et skrivebord til at give adressen til
+// kalenderprogrammet i stedet for til browseren, og alle udgivere skriver deres
+// links sådan. At afvise den ville være at afvise folk på en teknikalitet.
+func TestWebcalIsRewrittenToHTTPS(t *testing.T) {
+	got, err := normaliseCalendarURL("webcal://example.dk/kalender.ics")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got != "https://example.dk/kalender.ics" {
+		t.Errorf("blev til %q", got)
+	}
+
+	// Og en adresse indad afvises, hvor den skrives — ikke først når den hentes.
+	if _, err := normaliseCalendarURL("http://127.0.0.1:8080/x.ics"); err == nil {
+		t.Error("en loopback-adresse blev godtaget")
+	}
+	if _, err := normaliseCalendarURL("file:///etc/passwd"); err == nil {
+		t.Error("et skema, der ikke er http, blev godtaget")
+	}
+}

internal/httpapi/mailbox_handlers.go

@@ -202,8 +202,20 @@ func (s *Server) SyncMailbox(ctx context.Context, user *store.User, m *store.Mai
 			Description: msg.Snippet,
 			Priority:    4,
 			CreatedBy:   user.ID,
+			// Host and uid together: a uid is only unique within one mailbox on
+			// one server, and two accounts will hand out the same small numbers.
+			SourceKey: fmt.Sprintf("imap:%s:%s:%d", m.Host, m.Folder, msg.UID),
 		}
 		if err := s.db.CreateTask(ctx, task, nil); err != nil {
+			if errors.Is(err, store.ErrDuplicate) {
+				// Already a task. Still count it as read, or last_uid never moves
+				// past it and every sweep from here on stops at the same message.
+				done = append(done, msg.UID)
+				if msg.UID > highest {
+					highest = msg.UID
+				}
+				continue
+			}
 			s.log.Warn("mailbox create task", "err", err, "mailbox", m.ID)
 			continue
 		}

internal/httpapi/notes_handlers.go

@@ -19,21 +19,38 @@ import (
 
 // Notes.
 //
-// Access follows the project, because that is where a note lives: a note in a
-// shared project is readable by everybody who can read the project and writable
-// by an editor. A note with no project is its author's alone — the same answer a
-// task in the inbox gets, arrived at the same way rather than by a rule of its own.
+// Access has three ways in, and a note may have any of them at once. A note with
+// no project is its author's alone — the same answer a task in the inbox gets. A
+// note in a project is readable by everyone who can read the project and writable
+// by an editor. And a note can be shared with a person directly, which grants that
+// person a role of its own. The effective role is the most any of the three allow.
 
-// mayReadNote reports whether this person may see the note, and mayWriteNote
-// whether they may change it. Split, because a viewer on a shared project can do
-// the first and not the second.
+// mayTouchNote reports whether this person may act on the note at the given role —
+// RoleViewer to read, RoleEditor to change. Split by role because a viewer, whether
+// on a shared project or a shared note, may do the first and not the second.
 func (s *Server) mayTouchNote(r *http.Request, n *store.Note, role store.Role) bool {
 	user := userFrom(r.Context())
+	// The owner and the project path, exactly as before.
 	if n.ProjectID == "" {
-		return n.CreatedBy == user.ID
+		if n.CreatedBy == user.ID {
+			return true
+		}
+	} else if _, err := store.RequireProjectRole(r.Context(), s.db, n.ProjectID, user.ID, role); err == nil {
+		return true
 	}
-	_, err := store.RequireProjectRole(r.Context(), s.db, n.ProjectID, user.ID, role)
-	return err == nil
+	// A direct share grants its role on top of whatever the above allow.
+	if shareRole, ok, err := s.db.NoteShareRole(r.Context(), n.ID, user.ID); err == nil && ok {
+		return shareRole.AtLeast(role)
+	}
+	return false
+}
+
+// ownsNote reports whether this person is the note's owner — its created_by — which
+// is who, and only who, may hand it to other people. An editor on a shared note can
+// change its text; giving away access is the owner's alone, the same shape a
+// project takes where members edit but only the owner invites.
+func (s *Server) ownsNote(r *http.Request, n *store.Note) bool {
+	return n != nil && n.CreatedBy == userFrom(r.Context()).ID
 }
 
 func (s *Server) handleListNotes(w http.ResponseWriter, r *http.Request) {
@@ -48,7 +65,7 @@ func (s *Server) handleListNotes(w http.ResponseWriter, r *http.Request) {
 			s.internal(w, r, "search notes", err)
 			return
 		}
-		writeJSON(w, http.StatusOK, map[string]any{"notes": briefly(s.readable(r, found))})
+		writeJSON(w, http.StatusOK, map[string]any{"notes": s.markShared(r, briefly(s.readable(r, found)))})
 		return
 	}
 
@@ -62,7 +79,7 @@ func (s *Server) handleListNotes(w http.ResponseWriter, r *http.Request) {
 			s.internal(w, r, "notes in project", err)
 			return
 		}
-		writeJSON(w, http.StatusOK, map[string]any{"notes": briefly(found)})
+		writeJSON(w, http.StatusOK, map[string]any{"notes": s.markShared(r, briefly(found))})
 		return
 	}
 
@@ -75,7 +92,7 @@ func (s *Server) handleListNotes(w http.ResponseWriter, r *http.Request) {
 			s.internal(w, r, "list archived notes", err)
 			return
 		}
-		writeJSON(w, http.StatusOK, map[string]any{"notes": briefly(found)})
+		writeJSON(w, http.StatusOK, map[string]any{"notes": s.markShared(r, briefly(found))})
 		return
 	}
 
@@ -87,7 +104,7 @@ func (s *Server) handleListNotes(w http.ResponseWriter, r *http.Request) {
 		s.internal(w, r, "list notes", err)
 		return
 	}
-	writeJSON(w, http.StatusOK, map[string]any{"notes": briefly(found)})
+	writeJSON(w, http.StatusOK, map[string]any{"notes": s.markShared(r, briefly(found))})
 }
 
 // briefly replaces each note's body with the first of it.
@@ -206,9 +223,16 @@ func (s *Server) handleUpdateNote(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if body.ProjectID != nil {
-		// Moving it means being allowed on both sides: you cannot file somebody
-		// else's note into your project, nor yours into theirs.
+	if body.ProjectID != nil && *body.ProjectID != n.ProjectID {
+		// Filing a note is the owner's call, not an editor's. A shared editor may
+		// change the text; letting them also move the note would let them file
+		// somebody else's note into a project the owner is not in — and the owner,
+		// who is not a member there, would lose their own note. So the move is
+		// owner-only, and then only into a project the owner may write to.
+		if !s.ownsNote(r, n) {
+			writeError(w, http.StatusForbidden, CodeForbidden, "only the note's owner can move it")
+			return
+		}
 		if *body.ProjectID != "" {
 			if _, err := store.RequireProjectRole(r.Context(), s.db, *body.ProjectID,
 				userFrom(r.Context()).ID, store.RoleEditor); err != nil {
@@ -238,7 +262,16 @@ func (s *Server) handleDeleteNote(w http.ResponseWriter, r *http.Request) {
 		s.internal(w, r, "delete note", err)
 		return
 	}
-	if n == nil || !s.mayTouchNote(r, n, store.RoleEditor) {
+	// Deleting is not editing. Someone the note was shared with — even as an editor
+	// — may change its text, but throwing away the owner's note is the owner's to
+	// do. A project editor keeps the reach they have always had over a project's
+	// notes; a direct share does not extend that far.
+	mayDelete := s.ownsNote(r, n)
+	if !mayDelete && n != nil && n.ProjectID != "" {
+		_, perr := store.RequireProjectRole(r.Context(), s.db, n.ProjectID, userFrom(r.Context()).ID, store.RoleEditor)
+		mayDelete = perr == nil
+	}
+	if n == nil || !mayDelete {
 		writeError(w, http.StatusNotFound, CodeNotFound, "no such note")
 		return
 	}
@@ -280,6 +313,18 @@ func (s *Server) handleExportNotes(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	// Oldest first, and the id to break a tie. AllNotes comes back newest-first by
+	// the second, so two notes made in the same second have no order between them —
+	// and then which of two same-titled notes gets the plain name and which gets
+	// "(2)" is a coin toss that lands differently each export. Ordering the whole
+	// thing by when it was made settles it: the first note of a name keeps the name.
+	sort.SliceStable(notes, func(i, j int) bool {
+		if notes[i].CreatedAt.Equal(notes[j].CreatedAt) {
+			return notes[i].ID < notes[j].ID
+		}
+		return notes[i].CreatedAt.Before(notes[j].CreatedAt)
+	})
+
 	w.Header().Set("Content-Type", "application/zip")
 	w.Header().Set("Content-Disposition",
 		`attachment; filename="verdande-noter-`+time.Now().Format("2006-01-02")+`.zip"`)

internal/httpapi/notes_share_handlers.go

@@ -0,0 +1,181 @@
+package httpapi
+
+import (
+	"net/http"
+
+	"github.com/go-chi/chi/v5"
+
+	"github.com/kristianwind/verdande/internal/store"
+)
+
+// markShared fills in the two fields the list needs to show a note somebody else
+// shared with the reader: that it is such a note, and whose it is.
+//
+// Done in one pass over the page rather than per note: one query asks which of
+// these ids are shared with the reader, and one asks for the owners' names and
+// colours. A note the reader owns is never "shared with me", however it was
+// reached — the group is other people's notes, not one's own.
+func (s *Server) markShared(r *http.Request, notes []store.Note) []store.Note {
+	me := userFrom(r.Context()).ID
+	if len(notes) == 0 {
+		return notes
+	}
+
+	ids := make([]string, 0, len(notes))
+	for _, n := range notes {
+		if n.CreatedBy != me {
+			ids = append(ids, n.ID)
+		}
+	}
+	shared, err := s.db.NotesSharedWith(r.Context(), me, ids)
+	if err != nil {
+		// The list is worth more than the chip: a note without its "shared" mark
+		// still reads and still opens. Log nothing here — the store already did.
+		return notes
+	}
+
+	owners := map[string]store.Person{}
+	if len(shared) > 0 {
+		ownerIDs := make([]string, 0, len(shared))
+		for _, n := range notes {
+			if shared[n.ID] && n.CreatedBy != "" {
+				ownerIDs = append(ownerIDs, n.CreatedBy)
+			}
+		}
+		owners, _ = s.db.PeopleByIDs(r.Context(), ownerIDs)
+	}
+
+	for i := range notes {
+		if !shared[notes[i].ID] {
+			continue
+		}
+		notes[i].SharedWithMe = true
+		if p, ok := owners[notes[i].CreatedBy]; ok {
+			owner := p
+			notes[i].Owner = &owner
+		}
+	}
+	return notes
+}
+
+// handleListNoteShares is who a note is shared with. Owner only: the list of people
+// who can see your note is itself something only you should see.
+func (s *Server) handleListNoteShares(w http.ResponseWriter, r *http.Request) {
+	n, err := s.db.Note(r.Context(), chi.URLParam(r, "noteID"))
+	if err != nil {
+		s.internal(w, r, "get note", err)
+		return
+	}
+	// 404, not 403: telling a stranger "not yours" still confirms the note exists.
+	if n == nil || !s.ownsNote(r, n) {
+		writeError(w, http.StatusNotFound, CodeNotFound, "no such note")
+		return
+	}
+
+	shares, err := s.db.ListNoteShares(r.Context(), n.ID)
+	if err != nil {
+		s.internal(w, r, "list note shares", err)
+		return
+	}
+	out := make([]noteShareJSON, 0, len(shares))
+	already := map[string]bool{}
+	for _, sh := range shares {
+		out = append(out, noteShareJSON{
+			User: personJSON{ID: sh.User.ID, Name: sh.User.Name, AvatarColor: sh.User.AvatarColor},
+			Role: string(sh.Role),
+		})
+		already[sh.User.ID] = true
+	}
+
+	// The picker is filled from the same response, so the panel opens complete in
+	// one round-trip. People already on the note are left out — they are in the list
+	// above it, not the "add someone" menu.
+	candidates, err := s.db.UsersForSharing(r.Context(), userFrom(r.Context()).ID)
+	if err != nil {
+		s.internal(w, r, "share candidates", err)
+		return
+	}
+	cand := make([]personJSON, 0, len(candidates))
+	for _, p := range candidates {
+		if already[p.ID] {
+			continue
+		}
+		cand = append(cand, personJSON{ID: p.ID, Name: p.Name, AvatarColor: p.AvatarColor})
+	}
+
+	writeJSON(w, http.StatusOK, map[string]any{"shares": out, "candidates": cand})
+}
+
+type noteShareJSON struct {
+	User personJSON `json:"user"`
+	Role string     `json:"role"`
+}
+
+type shareNoteRequest struct {
+	UserID string `json:"user_id"`
+	Role   string `json:"role"`
+}
+
+// handleShareNote grants a person a role on a note, or changes the role they hold.
+func (s *Server) handleShareNote(w http.ResponseWriter, r *http.Request) {
+	var req shareNoteRequest
+	if err := decodeJSON(w, r, &req); err != nil {
+		return
+	}
+	n, err := s.db.Note(r.Context(), chi.URLParam(r, "noteID"))
+	if err != nil {
+		s.internal(w, r, "get note", err)
+		return
+	}
+	if n == nil || !s.ownsNote(r, n) {
+		writeError(w, http.StatusNotFound, CodeNotFound, "no such note")
+		return
+	}
+
+	role := store.Role(req.Role)
+	if role == "" {
+		role = store.RoleViewer
+	}
+	if role != store.RoleViewer && role != store.RoleEditor {
+		writeFieldErrors(w, map[string]string{"role": "must be viewer or editor"})
+		return
+	}
+	if req.UserID == "" {
+		writeFieldErrors(w, map[string]string{"user_id": "required"})
+		return
+	}
+	// The recipient must be a real account and not the sharer themselves; ShareNote
+	// refuses the owner, and a made-up id should not reach it.
+	if req.UserID == userFrom(r.Context()).ID {
+		writeFieldErrors(w, map[string]string{"user_id": "you already have this note"})
+		return
+	}
+	if _, err := s.db.PersonByID(r.Context(), req.UserID); err != nil {
+		writeError(w, http.StatusNotFound, CodeNotFound, "no such person")
+		return
+	}
+
+	if err := s.db.ShareNote(r.Context(), n.ID, req.UserID, role, userFrom(r.Context()).ID); err != nil {
+		s.storeError(w, r, "share note", err)
+		return
+	}
+	w.WriteHeader(http.StatusNoContent)
+}
+
+// handleUnshareNote takes a person's access away again.
+func (s *Server) handleUnshareNote(w http.ResponseWriter, r *http.Request) {
+	n, err := s.db.Note(r.Context(), chi.URLParam(r, "noteID"))
+	if err != nil {
+		s.internal(w, r, "get note", err)
+		return
+	}
+	if n == nil || !s.ownsNote(r, n) {
+		writeError(w, http.StatusNotFound, CodeNotFound, "no such note")
+		return
+	}
+	if err := s.db.UnshareNote(r.Context(), n.ID, chi.URLParam(r, "userID")); err != nil {
+		s.internal(w, r, "unshare note", err)
+		return
+	}
+	w.WriteHeader(http.StatusNoContent)
+}

internal/httpapi/notes_share_test.go

@@ -0,0 +1,199 @@
+package httpapi
+
+import (
+	"net/http"
+	"testing"
+)
+
+// createNote makes a note as the current client and returns its id.
+func (ts *testServer) createNote(t *testing.T, body string) string {
+	t.Helper()
+	resp, out := ts.do(t, "POST", "/api/v1/notes", map[string]any{"body": body})
+	if resp.StatusCode != http.StatusCreated {
+		t.Fatalf("create note: status %d", resp.StatusCode)
+	}
+	id, _ := out["id"].(string)
+	if id == "" {
+		t.Fatal("create note returned no id")
+	}
+	return id
+}
+
+func userID(t *testing.T, ts *testServer, email string) string {
+	t.Helper()
+	u, err := ts.db.UserByEmail(t.Context(), email)
+	if err != nil {
+		t.Fatalf("look up %s: %v", email, err)
+	}
+	return u.ID
+}
+
+// A note shared with a person shows up in their list, marked as theirs-from-
+// somebody, and a viewer can read it but not change it.
+func TestSharedNoteReachesTheOtherPerson(t *testing.T) {
+	owner := newTestServer(t)
+	owner.bootstrap(t)
+	other := owner.newUser(t, "sofie@example.dk", "Sofie")
+	sofie := userID(t, owner, "sofie@example.dk")
+
+	noteID := owner.createNote(t, "# Ferieplan\nuge 29")
+
+	// Before sharing, Sofie cannot see it at all.
+	if resp, _ := other.do(t, "GET", "/api/v1/notes/"+noteID, nil); resp.StatusCode != http.StatusNotFound {
+		t.Fatalf("an unshared note was reachable: %d", resp.StatusCode)
+	}
+
+	// Share it as a viewer.
+	resp, _ := owner.do(t, "POST", "/api/v1/notes/"+noteID+"/shares",
+		map[string]string{"user_id": sofie, "role": "viewer"})
+	if resp.StatusCode != http.StatusNoContent {
+		t.Fatalf("share: status %d", resp.StatusCode)
+	}
+
+	// Now it is in Sofie's list, flagged as shared with her and carrying its owner.
+	_, list := other.do(t, "GET", "/api/v1/notes", nil)
+	notes, _ := list["notes"].([]any)
+	var found map[string]any
+	for _, raw := range notes {
+		n := raw.(map[string]any)
+		if n["id"] == noteID {
+			found = n
+		}
+	}
+	if found == nil {
+		t.Fatal("the shared note is not in the recipient's list")
+	}
+	if found["shared_with_me"] != true {
+		t.Errorf("the note is not marked shared_with_me: %v", found)
+	}
+	ownerObj, _ := found["owner"].(map[string]any)
+	if ownerObj == nil || ownerObj["name"] != "Kristian" {
+		t.Errorf("the owner is not carried on the shared note: %v", found["owner"])
+	}
+
+	// A viewer reads it.
+	if resp, _ := other.do(t, "GET", "/api/v1/notes/"+noteID, nil); resp.StatusCode != http.StatusOK {
+		t.Errorf("a viewer could not read the shared note: %d", resp.StatusCode)
+	}
+	// But cannot change it.
+	if resp, _ := other.do(t, "PATCH", "/api/v1/notes/"+noteID,
+		map[string]any{"body": "hijacked"}); resp.StatusCode != http.StatusNotFound {
+		t.Errorf("a viewer changed a shared note: %d", resp.StatusCode)
+	}
+}
+
+// An editor may change the text, but only the owner may delete the note or hand it
+// to somebody else.
+func TestSharedEditorCanWriteButNotGiveAway(t *testing.T) {
+	owner := newTestServer(t)
+	owner.bootstrap(t)
+	other := owner.newUser(t, "sofie@example.dk", "Sofie")
+	sofie := userID(t, owner, "sofie@example.dk")
+
+	noteID := owner.createNote(t, "# Delt\noprindelig")
+	if resp, _ := owner.do(t, "POST", "/api/v1/notes/"+noteID+"/shares",
+		map[string]string{"user_id": sofie, "role": "editor"}); resp.StatusCode != http.StatusNoContent {
+		t.Fatalf("share as editor failed")
+	}
+
+	// The editor writes.
+	if resp, _ := other.do(t, "PATCH", "/api/v1/notes/"+noteID,
+		map[string]any{"body": "# Delt\nrettet"}); resp.StatusCode != http.StatusOK {
+		t.Errorf("an editor could not change a shared note: %d", resp.StatusCode)
+	}
+
+	// The editor cannot re-share it: giving access is the owner's alone.
+	if resp, _ := other.do(t, "GET", "/api/v1/notes/"+noteID+"/shares", nil); resp.StatusCode != http.StatusNotFound {
+		t.Errorf("an editor could read the share list: %d", resp.StatusCode)
+	}
+	// The editor cannot delete it.
+	if resp, _ := other.do(t, "DELETE", "/api/v1/notes/"+noteID, nil); resp.StatusCode == http.StatusNoContent {
+		t.Error("an editor deleted the owner's note")
+	}
+	// The note still exists for the owner.
+	if resp, _ := owner.do(t, "GET", "/api/v1/notes/"+noteID, nil); resp.StatusCode != http.StatusOK {
+		t.Errorf("the note is gone after the editor's delete attempt: %d", resp.StatusCode)
+	}
+}
+
+// Unsharing takes access away again, and only the owner can do it.
+func TestUnshareRemovesAccess(t *testing.T) {
+	owner := newTestServer(t)
+	owner.bootstrap(t)
+	other := owner.newUser(t, "sofie@example.dk", "Sofie")
+	sofie := userID(t, owner, "sofie@example.dk")
+
+	noteID := owner.createNote(t, "# Hemmelig")
+	owner.do(t, "POST", "/api/v1/notes/"+noteID+"/shares",
+		map[string]string{"user_id": sofie, "role": "viewer"})
+
+	// A non-owner cannot unshare.
+	if resp, _ := other.do(t, "DELETE", "/api/v1/notes/"+noteID+"/shares/"+sofie, nil); resp.StatusCode != http.StatusNotFound {
+		t.Errorf("a non-owner unshared a note: %d", resp.StatusCode)
+	}
+
+	// The owner can.
+	if resp, _ := owner.do(t, "DELETE", "/api/v1/notes/"+noteID+"/shares/"+sofie, nil); resp.StatusCode != http.StatusNoContent {
+		t.Fatalf("owner unshare: %d", resp.StatusCode)
+	}
+	// And access is gone.
+	if resp, _ := other.do(t, "GET", "/api/v1/notes/"+noteID, nil); resp.StatusCode != http.StatusNotFound {
+		t.Errorf("the note was still reachable after unsharing: %d", resp.StatusCode)
+	}
+}
+
+// The share list is owner-only and offers the instance's other people as
+// candidates, minus those already on the note.
+func TestShareListShowsCandidatesAndIsOwnerOnly(t *testing.T) {
+	owner := newTestServer(t)
+	owner.bootstrap(t)
+	owner.newUser(t, "sofie@example.dk", "Sofie")
+	owner.newUser(t, "anders@example.dk", "Anders")
+	sofie := userID(t, owner, "sofie@example.dk")
+
+	noteID := owner.createNote(t, "# Plan")
+	owner.do(t, "POST", "/api/v1/notes/"+noteID+"/shares",
+		map[string]string{"user_id": sofie, "role": "viewer"})
+
+	_, out := owner.do(t, "GET", "/api/v1/notes/"+noteID+"/shares", nil)
+	shares, _ := out["shares"].([]any)
+	if len(shares) != 1 {
+		t.Fatalf("shares = %d, want 1", len(shares))
+	}
+	cands, _ := out["candidates"].([]any)
+	// Anders is a candidate; Sofie is already on the note and so is not.
+	names := map[string]bool{}
+	for _, c := range cands {
+		names[c.(map[string]any)["name"].(string)] = true
+	}
+	if !names["Anders"] {
+		t.Errorf("Anders is not offered as a candidate: %v", names)
+	}
+	if names["Sofie"] {
+		t.Error("somebody already on the note is offered as a candidate")
+	}
+	if names["Kristian"] {
+		t.Error("the owner is offered as a candidate to share with themselves")
+	}
+}
+
+// Sharing refuses a made-up person and the owner themselves.
+func TestShareRejectsUnknownAndSelf(t *testing.T) {
+	owner := newTestServer(t)
+	owner.bootstrap(t)
+	me := userID(t, owner, "kristian@example.dk")
+	noteID := owner.createNote(t, "# Note")
+
+	if resp, _ := owner.do(t, "POST", "/api/v1/notes/"+noteID+"/shares",
+		map[string]string{"user_id": "does-not-exist", "role": "viewer"}); resp.StatusCode != http.StatusNotFound {
+		t.Errorf("sharing with an unknown id: %d, want 404", resp.StatusCode)
+	}
+	if resp, _ := owner.do(t, "POST", "/api/v1/notes/"+noteID+"/shares",
+		map[string]string{"user_id": me, "role": "viewer"}); resp.StatusCode != http.StatusUnprocessableEntity {
+		t.Errorf("sharing with oneself: %d, want 422", resp.StatusCode)
+	}
+	if resp, _ := owner.do(t, "POST", "/api/v1/notes/"+noteID+"/shares",
+		map[string]string{"user_id": me, "role": "owner"}); resp.StatusCode == http.StatusNoContent {
+		t.Error("a note was shared at the owner role")
+	}
+}

internal/httpapi/notifications_handlers.go

@@ -1,7 +1,9 @@
 package httpapi
 
 import (
+	"errors"
 	"net/http"
+	"net/url"
 	"strings"
 	"time"
 
@@ -106,41 +108,186 @@ func (s *Server) PushToUser(userID, title, body, projectID string) {
 	s.pushToUser(userID, title, body, projectID)
 }
 
-func (s *Server) pushToUser(userID, title, body, projectID string) {
+// pushOutcome is what happened, per device.
+//
+// It exists because "nothing arrives" was unanswerable. A push that a service
+// refuses is the ordinary failure here — a stale subscription, a VAPID subject the
+// service will not take, a browser that revoked permission without telling the
+// server — and every one of them looked exactly like silence.
+type pushOutcome struct {
+	Subscriptions int           `json:"subscriptions"`
+	Sent          int           `json:"sent"`
+	Failed        []pushFailure `json:"failed"`
+}
+
+// pushFailure names the service and quotes what it said.
+//
+// The host and not the endpoint: the rest of that URL is the credential the push
+// service issued for this device, and it does not belong in an answer, a log line
+// or a screenshot.
+type pushFailure struct {
+	Service string `json:"service"`
+	Reason  string `json:"reason"`
+}
+
+func (s *Server) pushToUser(userID, title, body, projectID string) pushOutcome {
 	ctx, cancel := contextWithBackgroundTimeout(30 * time.Second)
 	defer cancel()
 
+	var out pushOutcome
 	subs, err := s.db.ListPushSubscriptions(ctx, userID)
 	if err != nil || len(subs) == 0 {
-		return
+		return out
 	}
+	out.Subscriptions = len(subs)
+
 	public, private, err := s.vapidKeys(ctx)
 	if err != nil {
 		s.log.Warn("vapid keys", "err", err)
-		return
+		out.Failed = append(out.Failed, pushFailure{Service: "verdande", Reason: err.Error()})
+		return out
 	}
 
-	payload := push.Payload{Title: title, Body: body, URL: "/projekt/" + projectID}
+	target := "/projekt/" + projectID
+	if projectID == "" {
+		target = "/"
+	}
+	payload := push.Payload{Title: title, Body: body, URL: target}
+	subject := s.vapidSubject()
 	for _, sub := range subs {
 		err := push.Send(ctx, push.Subscription{
 			Endpoint: sub.Endpoint, P256dh: sub.P256dh, Auth: sub.Auth,
 		}, payload, push.VAPID{
-			Public: public, Private: private, Subject: "mailto:" + s.cfg.SMTP.From,
+			Public: public, Private: private, Subject: subject,
 		})
 		if err == nil {
+			out.Sent++
+			if delErr := s.db.MarkPushDelivered(ctx, sub.Endpoint); delErr != nil {
+				s.log.Warn("mark push delivered", "err", delErr)
+			}
 			continue
 		}
-		s.log.Debug("web push failed", "err", err, "endpoint", sub.Endpoint)
+		// Warn, not Debug.
+		//
+		// This was the one line that would have said why no notification ever
+		// arrived, and at Debug it is not printed on an instance running at the
+		// default level. A delivery that fails silently and a delivery that does
+		// not happen look the same from the outside, and the difference is the
+		// whole diagnosis.
+		reason := pushReason(sub.Endpoint, err)
+		s.log.Warn("web push refused", "reason", reason, "service", pushHost(sub.Endpoint), "user", userID)
+		out.Failed = append(out.Failed, pushFailure{
+			Service: pushHost(sub.Endpoint),
+			Reason:  reason,
+		})
 		if recErr := s.db.RecordPushFailure(ctx, sub.Endpoint, push.IsGone(err)); recErr != nil {
 			s.log.Warn("record push failure", "err", recErr)
 		}
 	}
+	return out
+}
+
+// pushReason is what went wrong, with the endpoint taken back out of it.
+//
+// Go wraps a transport failure as `*url.Error`, and its message is `Post
+// "https://fcm.googleapis.com/fcm/send/dQw4w9…": dial tcp: …` — the whole
+// endpoint, which is the credential the push service issued for that device. It
+// would have gone into the answer, the log line and any screenshot of either. A
+// test written to prove the host was reported instead is what found it.
+//
+// Unwrapped first, so the cause is what is quoted. Then the endpoint is scrubbed
+// anyway: the next error type to carry it will not come with a warning.
+func pushReason(endpoint string, err error) string {
+	var urlErr *url.Error
+	if errors.As(err, &urlErr) && urlErr.Err != nil {
+		err = urlErr.Err
+	}
+	reason := err.Error()
+	if endpoint != "" {
+		reason = strings.ReplaceAll(reason, endpoint, pushHost(endpoint))
+	}
+	return reason
+}
+
+// pushHost is the service an endpoint belongs to, and nothing else from it.
+func pushHost(endpoint string) string {
+	u, err := url.Parse(endpoint)
+	if err != nil || u.Host == "" {
+		return "ukendt"
+	}
+	return u.Host
+}
+
+// handlePushTest sends one notification to this account's devices and says what
+// happened to it.
+//
+// Reported as "der kommer ikke nogen". Everything about that was invisible: the
+// settings page said "on for this device" as soon as a subscription existed, and a
+// refusal from the push service went into a Debug line nobody sees. There was no
+// way to tell "the browser never subscribed" from "the service refused it" from
+// "nothing has come due yet" — three different problems with one appearance.
+//
+// It goes through the same path as a real notification rather than a shortcut, so
+// what it proves is the thing that actually has to work.
+//
+// The words come from the client, which is where the dictionaries are. A server
+// that carries its own copy of "This is a test" carries it in one language, and
+// this one deliberately keeps its prose in the interface — see
+// `internal/i18n`. The text is only ever shown back to the person who asked for
+// it, on their own devices.
+func (s *Server) handlePushTest(w http.ResponseWriter, r *http.Request) {
+	var req struct {
+		Title string `json:"title"`
+		Body  string `json:"body"`
+	}
+	if err := decodeJSON(w, r, &req); err != nil {
+		return
+	}
+	title := strings.TrimSpace(req.Title)
+	if title == "" {
+		title = "verdande"
+	}
+	// Bounded: this is written into a notification on somebody's lock screen, and
+	// a megabyte of title is not a notification.
+	if len(title) > 200 {
+		title = title[:200]
+	}
+	body := strings.TrimSpace(req.Body)
+	if len(body) > 500 {
+		body = body[:500]
+	}
+
+	user := userFrom(r.Context())
+	writeJSON(w, http.StatusOK, s.pushToUser(user.ID, title, body, ""))
 }
 
 func (s *Server) vapidKeys(ctx contextLike) (string, string, error) {
 	return s.db.InstanceKeys(ctx, push.GenerateVAPIDKeys)
 }
 
+// vapidSubject is the "sub" claim a push service is told to reach the sender at.
+//
+// It has to be one the service will actually accept, and Apple is the strict one:
+// it answers 403 Forbidden to a mailto whose domain is made up — which is exactly
+// what the old fallback, mailto:verdande@example.invalid, was on an instance with
+// no mail set up. Every push to an iPhone or a Mac was rejected, silently as far as
+// the person waiting for the notification could tell.
+//
+// So a real address is used when there is one, and otherwise the instance's own
+// https address — which is a valid VAPID subject, points at something that exists,
+// and Apple accepts. Verified against web.push.apple.com: the mailto gets a 403,
+// the https URL a 201.
+func (s *Server) vapidSubject() string {
+	from := strings.TrimSpace(s.cfg.SMTP.From)
+	if from != "" && strings.Contains(from, "@") && !strings.HasSuffix(from, "@localhost") {
+		return "mailto:" + from
+	}
+	if strings.HasPrefix(s.cfg.BaseURL, "https://") || strings.HasPrefix(s.cfg.BaseURL, "http://") {
+		return s.cfg.BaseURL
+	}
+	return "mailto:verdande@example.invalid"
+}
+
 // --- subscription endpoints -----------------------------------------------------------
 
 type pushSubscriptionRequest struct {

internal/httpapi/push_subject_test.go

@@ -0,0 +1,33 @@
+package httpapi
+
+import (
+	"testing"
+
+	"github.com/kristianwind/verdande/internal/config"
+)
+
+// The VAPID subject has to be one a push service will accept. Apple answers 403 to
+// a mailto with a made-up domain, which is what the no-mail fallback used to be, so
+// every push to an Apple device was refused. With no real address, the instance's
+// own https URL is used instead — valid, real, and accepted.
+func TestVAPIDSubject(t *testing.T) {
+	cases := []struct {
+		name    string
+		from    string
+		baseURL string
+		want    string
+	}{
+		{"a real address is used as-is", "todo@example.dk", "https://verdande.example.dk", "mailto:todo@example.dk"},
+		{"no mail falls back to the https url", "", "https://verdande.example.dk", "https://verdande.example.dk"},
+		{"the localhost default is not a real address", "verdande@localhost", "https://verdande.example.dk", "https://verdande.example.dk"},
+		{"a plain http dev url still serves as a subject", "", "http://localhost:8080", "http://localhost:8080"},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			s := &Server{cfg: &config.Config{BaseURL: tc.baseURL, SMTP: config.SMTP{From: tc.from}}}
+			if got := s.vapidSubject(); got != tc.want {
+				t.Errorf("vapidSubject() = %q, want %q", got, tc.want)
+			}
+		})
+	}
+}

internal/httpapi/realip.go

@@ -0,0 +1,88 @@
+package httpapi
+
+import (
+	"net"
+	"net/http"
+	"net/netip"
+	"strings"
+
+	"github.com/kristianwind/verdande/internal/config"
+)
+
+// realIP rewrites r.RemoteAddr to the client address a trusted proxy reported,
+// and does nothing at all when the peer is not trusted.
+//
+// This replaces chi's middleware.RealIP, which is deprecated precisely because it
+// believes a forwarded header from anyone: an attacker sets X-Forwarded-For to a
+// new value on every request and gets a fresh rate-limit bucket each time, and
+// writes whatever address they like into the audit log. The one control that
+// exists for when a password is already gone is keyed on this address, so it has
+// to be an address the caller cannot choose.
+//
+// The gate is the peer. A header is read only when the machine that opened the
+// connection is one of cfg.TrustedProxies — a reverse proxy or tunnel the operator
+// put there. A connection straight off the internet is trusted for nothing, so its
+// header is ignored and it is keyed on the address it actually came from. Behind a
+// proxy that overwrites the client's own header (nginx, Caddy and cloudflared all
+// do) the value is then the real client and cannot be forged from outside.
+func realIP(cfg *config.Config) func(http.Handler) http.Handler {
+	trusted := cfg.TrustedProxies
+	header := cfg.RealIPHeader
+	if header == "" {
+		header = "X-Forwarded-For"
+	}
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			if ip := trustedClientIP(r, trusted, header); ip != "" {
+				// Port preserved off the original peer only for shape; downstream
+				// clientIP() splits it away, and the forwarded value carries none.
+				r.RemoteAddr = ip
+			}
+			next.ServeHTTP(w, r)
+		})
+	}
+}
+
+// trustedClientIP returns the forwarded client address if the peer may be believed,
+// or "" to leave RemoteAddr untouched.
+func trustedClientIP(r *http.Request, trusted []netip.Prefix, header string) string {
+	peer := r.RemoteAddr
+	if host, _, err := net.SplitHostPort(peer); err == nil {
+		peer = host
+	}
+	peerAddr, err := netip.ParseAddr(peer)
+	if err != nil || !isTrusted(peerAddr, trusted) {
+		return ""
+	}
+
+	raw := r.Header.Get(header)
+	if raw == "" {
+		return ""
+	}
+	// The leftmost entry is the original client. That entry is only as trustworthy
+	// as the proxy that wrote it — but the trusted proxy is exactly the one that
+	// replaces a client-supplied header, so on the deployments this is written for
+	// it is the real client, and on a direct connection we never reach this line.
+	first := raw
+	if i := strings.IndexByte(raw, ','); i >= 0 {
+		first = raw[:i]
+	}
+	first = strings.TrimSpace(first)
+	if _, err := netip.ParseAddr(first); err != nil {
+		return ""
+	}
+	return first
+}
+
+func isTrusted(addr netip.Addr, trusted []netip.Prefix) bool {
+	if !addr.IsValid() {
+		return false
+	}
+	addr = addr.Unmap()
+	for _, p := range trusted {
+		if p.Contains(addr) {
+			return true
+		}
+	}
+	return false
+}

internal/httpapi/realip_test.go

@@ -0,0 +1,94 @@
+package httpapi
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/kristianwind/verdande/internal/config"
+)
+
+// The address the rate limiter keys on must be one the caller cannot choose. A
+// forwarded header is believed only from a trusted proxy, and ignored from a
+// stranger connecting directly — the difference between a control and a suggestion.
+func TestRealIPTrustsOnlyTheProxy(t *testing.T) {
+	cfg, err := config.Load()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	seen := ""
+	h := realIP(cfg)(http.HandlerFunc(func(_ http.ResponseWriter, r *http.Request) {
+		seen = clientIP(r)
+	}))
+
+	cases := []struct {
+		name       string
+		remoteAddr string
+		xff        string
+		want       string
+	}{
+		{
+			// A private peer is a proxy the operator put there: believe it.
+			name:       "trusted proxy is believed",
+			remoteAddr: "10.1.2.3:5000",
+			xff:        "203.0.113.9",
+			want:       "203.0.113.9",
+		},
+		{
+			// A public peer connected straight to us; its header is a guess.
+			name:       "public peer header ignored",
+			remoteAddr: "198.51.100.7:5000",
+			xff:        "203.0.113.9",
+			want:       "198.51.100.7",
+		},
+		{
+			// No header from a trusted proxy leaves the peer as the answer.
+			name:       "trusted peer without header",
+			remoteAddr: "127.0.0.1:5000",
+			xff:        "",
+			want:       "127.0.0.1",
+		},
+		{
+			// A spoofed value from a stranger cannot become the key.
+			name:       "spoof from outside does not win",
+			remoteAddr: "198.51.100.7:5000",
+			xff:        "127.0.0.1",
+			want:       "198.51.100.7",
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			r := httptest.NewRequest("POST", "/api/v1/auth/login", nil)
+			r.RemoteAddr = tc.remoteAddr
+			if tc.xff != "" {
+				r.Header.Set("X-Forwarded-For", tc.xff)
+			}
+			h.ServeHTTP(httptest.NewRecorder(), r)
+			if seen != tc.want {
+				t.Errorf("keyed on %q, want %q", seen, tc.want)
+			}
+		})
+	}
+}
+
+// "none" turns the trust off entirely, for an instance exposed directly.
+func TestRealIPTrustNone(t *testing.T) {
+	t.Setenv("VERDANDE_TRUSTED_PROXIES", "none")
+	cfg, err := config.Load()
+	if err != nil {
+		t.Fatal(err)
+	}
+	seen := ""
+	h := realIP(cfg)(http.HandlerFunc(func(_ http.ResponseWriter, r *http.Request) {
+		seen = clientIP(r)
+	}))
+	r := httptest.NewRequest("POST", "/", nil)
+	r.RemoteAddr = "10.1.2.3:5000" // even a private peer is not trusted now
+	r.Header.Set("X-Forwarded-For", "203.0.113.9")
+	h.ServeHTTP(httptest.NewRecorder(), r)
+	if seen != "10.1.2.3" {
+		t.Errorf("keyed on %q, want the peer 10.1.2.3", seen)
+	}
+}

internal/httpapi/server.go

@@ -63,6 +63,8 @@ type Server struct {
 	// the endpoints that check a secret are limited separately and more tightly
 	// than the rest of the API.
 	loginLimiter *limiter
+	// Sat kun af prøver; se icsClient().
+	icsFetch     *http.Client
 	mailLimiter  *limiter
 	resetLimiter *limiter
 	// Second factors are counted against the *account*, not the address. An
@@ -108,7 +110,10 @@ func New(cfg *config.Config, db *store.DB, log *slog.Logger, web fs.FS) *Server
 
 	r := chi.NewRouter()
 	r.Use(middleware.RequestID)
-	r.Use(middleware.RealIP)
+	// Not middleware.RealIP: that believes a forwarded header from anyone, which
+	// lets a caller pick the address the rate limiter and audit log key on. This
+	// one reads the header only from a trusted proxy — see realip.go.
+	r.Use(realIP(cfg))
 	r.Use(requestLogger(log))
 	r.Use(middleware.Recoverer)
 	r.Use(middleware.Timeout(30 * time.Second))
@@ -295,6 +300,9 @@ func New(cfg *config.Config, db *store.DB, log *slog.Logger, web fs.FS) *Server
 				r.Get("/key", s.handlePushKey)
 				r.Post("/subscribe", s.handleSubscribePush)
 				r.Post("/unsubscribe", s.handleUnsubscribePush)
+				// One notification, to this account's own devices, reporting what
+				// each of them did with it. The answer to "der kommer ikke nogen".
+				r.Post("/test", s.handlePushTest)
 			})
 
 			r.Route("/attachments/{attachmentID}", func(r chi.Router) {
@@ -340,6 +348,11 @@ func New(cfg *config.Config, db *store.DB, log *slog.Logger, web fs.FS) *Server
 				r.Post("/", s.handleCreateNote)
 				r.Post("/import", s.handleImportNotes)
 				r.Get("/linking/{kind}/{targetID}", s.handleNotesLinking)
+				// Sharing a note with a person directly — its own access list, beside
+				// the project path. Owner only; see notes_share_handlers.go.
+				r.Get("/{noteID}/shares", s.handleListNoteShares)
+				r.Post("/{noteID}/shares", s.handleShareNote)
+				r.Delete("/{noteID}/shares/{userID}", s.handleUnshareNote)
 				r.Get("/{noteID}", s.handleGetNote)
 				r.Patch("/{noteID}", s.handleUpdateNote)
 				r.Delete("/{noteID}", s.handleDeleteNote)
@@ -389,6 +402,12 @@ func New(cfg *config.Config, db *store.DB, log *slog.Logger, web fs.FS) *Server
 				r.Post("/authorize", s.handleCalendarAuthorize)
 				r.Post("/sync", s.handleCalendarSyncNow)
 				r.Get("/events", s.handleCalendarEvents)
+
+				// Abonnementer: en kalender, man kun har en adresse til. Flere pr.
+				// person, hvor Google er én — det er adressen, der er identiteten,
+				// hvor tokenet er det for OAuth.
+				r.Post("/subscriptions", s.handleSubscribeCalendar)
+				r.Delete("/subscriptions/{id}", s.handleUnsubscribeCalendar)
 			})
 
 			r.Route("/import", func(r chi.Router) {
@@ -654,6 +673,31 @@ func (s *Server) securityHeaders(next http.Handler) http.Handler {
 		h.Set("X-Frame-Options", "DENY")
 		h.Set("Referrer-Policy", "same-origin")
 		h.Set("Content-Security-Policy", s.csp)
+		// The session lives in a __Host- cookie that only exists over HTTPS, so the
+		// whole security model already assumes TLS. HSTS is what makes that
+		// assumption hold against a network attacker: without it, the very first
+		// navigation can be stripped to http:// and the cookie handed over in the
+		// clear. Gated on the same condition as the cookie's Secure flag, so a
+		// plain-HTTP dev instance is never told to demand a certificate it cannot
+		// present. Two years, subdomains included; no preload directive, because
+		// asking to be hard-coded into browsers is a decision the operator makes
+		// for their domain, not one a self-hosted app makes for them.
+		if s.secureCookies() {
+			h.Set("Strict-Transport-Security", "max-age=63072000; includeSubDomains")
+		}
+		// verdande uses none of the powerful browser features, so the safest policy
+		// is to turn them all off: an injected element cannot ask for the camera,
+		// the microphone or the location if the page itself has already declined
+		// them. Named explicitly rather than with a wildcard because the wildcard
+		// form of this header is not universally understood, and a directive a
+		// browser ignores is not a control.
+		h.Set("Permissions-Policy", "camera=(), microphone=(), geolocation=(), "+
+			"payment=(), usb=(), interest-cohort=()")
+		// Isolate the browsing context: a window this page opened, or one that
+		// opened it, cannot keep a handle across the origin boundary. verdande
+		// never scripts another window, so there is nothing to lose and a whole
+		// class of cross-window attacks to close.
+		h.Set("Cross-Origin-Opener-Policy", "same-origin")
 		next.ServeHTTP(w, r)
 	})
 }

internal/httpapi/tasks_test.go

@@ -6,6 +6,7 @@ import (
 	"io"
 	"mime/multipart"
 	"net/http"
+	"net/url"
 	"strings"
 	"testing"
 	"time"
@@ -1777,3 +1778,42 @@ func TestQuickAddSectionIDIsCheckedAgainstTheProject(t *testing.T) {
 		t.Errorf("content = %v", moved["content"])
 	}
 }
+
+// A word inside a word, on the task side.
+//
+// The notes search grew this first — a note holding `keepInventory` could not be
+// found by typing "keep inventory" — and a task is the same sentence with a
+// different table behind it. `SpeedAdmin` is one token, so "speed admin" asks for
+// two words that are nowhere.
+//
+// Having it in one of the two searches would be worse than having it in neither:
+// "it finds it in my notes but not in my tasks" is the next report.
+func TestATaskIsFoundByAWordInsideAWord(t *testing.T) {
+	ts := newTestServer(t)
+	ts.bootstrap(t)
+
+	ts.do(t, "POST", "/api/v1/tasks", map[string]any{
+		"content": "Opret kodeord til Kulturskolen (SpeedAdmin)",
+	})
+	ts.do(t, "POST", "/api/v1/tasks", map[string]any{"content": "Køb kaffe"})
+
+	for _, tc := range []struct {
+		query string
+		want  int
+	}{
+		{"speed admin", 1},
+		{"admin", 1},
+		{"speedadmin", 1},
+		{"kulturskolen", 1},
+		{"vandhane", 0},
+	} {
+		resp, body := ts.do(t, "GET", "/api/v1/search?q="+url.QueryEscape(tc.query), nil)
+		if resp.StatusCode != http.StatusOK {
+			t.Fatalf("%q: status %d", tc.query, resp.StatusCode)
+		}
+		tasks, _ := body["tasks"].([]any)
+		if len(tasks) != tc.want {
+			t.Errorf("%q found %d tasks, want %d", tc.query, len(tasks), tc.want)
+		}
+	}
+}

internal/ics/ics.go

@@ -62,8 +62,13 @@ func Render(cal Calendar) string {
 
 	for _, t := range cal.Tasks {
 		writeTodo(&b, t, cal.Domain)
-		// A dated task also goes out as an event, for clients that ignore VTODO.
-		if t.DueDatetime != nil && !t.Completed {
+		// A dated task also goes out as an event, for the calendar apps that ignore
+		// VTODO — which is all of them: Apple Calendar and Google both drop a
+		// subscribed to-do on the floor and show only events. A task with a clock
+		// time becomes a timed event; one with only a date, an all-day event. Once
+		// this was limited to timed tasks, so a date-only task — most of them —
+		// simply never appeared in the calendar it was subscribed into.
+		if !t.Completed && (t.DueDatetime != nil || t.DueDate != "") {
 			writeEvent(&b, t, cal.Domain)
 		}
 	}
@@ -128,22 +133,31 @@ func writeTodo(b *strings.Builder, t Task, domain string) {
 }
 
 func writeEvent(b *strings.Builder, t Task, domain string) {
-	start := *t.DueDatetime
-	// Without a stated duration a task is shown as half an hour. A zero-length
-	// event collapses to an invisible sliver in most calendar grids.
-	minutes := 30
-	if t.DurationMin != nil && *t.DurationMin > 0 {
-		minutes = *t.DurationMin
-	}
-	end := start.Add(time.Duration(minutes) * time.Minute)
-
 	b.WriteString("BEGIN:VEVENT\r\n")
 	// A distinct UID suffix: the event and the to-do describe the same task, and
 	// sharing a UID would make a client treat them as two versions of one item.
 	writeLine(b, "UID:"+t.ID+"-event@"+domain)
 	writeLine(b, "DTSTAMP:"+utc(t.UpdatedAt))
-	writeLine(b, "DTSTART:"+utc(start))
-	writeLine(b, "DTEND:"+utc(end))
+
+	if t.DueDatetime != nil {
+		start := *t.DueDatetime
+		// Without a stated duration a task is shown as half an hour. A zero-length
+		// event collapses to an invisible sliver in most calendar grids.
+		minutes := 30
+		if t.DurationMin != nil && *t.DurationMin > 0 {
+			minutes = *t.DurationMin
+		}
+		writeLine(b, "DTSTART:"+utc(start))
+		writeLine(b, "DTEND:"+utc(start.Add(time.Duration(minutes)*time.Minute)))
+	} else {
+		// A date with no time is an all-day event. DTEND is exclusive — a one-day
+		// event ends on the following date — which is what keeps it a single day in
+		// the grid rather than bleeding into the next.
+		day := strings.ReplaceAll(t.DueDate, "-", "")
+		writeLine(b, "DTSTART;VALUE=DATE:"+day)
+		writeLine(b, "DTEND;VALUE=DATE:"+nextDay(t.DueDate))
+	}
+
 	writeLine(b, "SUMMARY:"+escape(t.Content))
 	if t.Description != "" {
 		writeLine(b, "DESCRIPTION:"+escape(t.Description))
@@ -157,6 +171,17 @@ func writeEvent(b *strings.Builder, t Task, domain string) {
 
 func utc(t time.Time) string { return t.UTC().Format("20060102T150405Z") }
 
+// nextDay is the YYYYMMDD after a YYYY-MM-DD date, for an all-day event's exclusive
+// DTEND. A malformed date is returned as its own compacted form rather than
+// dropped, so a task never loses its event over a bad string.
+func nextDay(date string) string {
+	d, err := time.Parse("2006-01-02", date)
+	if err != nil {
+		return strings.ReplaceAll(date, "-", "")
+	}
+	return d.AddDate(0, 0, 1).Format("20060102")
+}
+
 // escape applies RFC 5545 text escaping. A comma or semicolon in a task title is
 // a value separator in iCalendar, so an unescaped one silently truncates the
 // summary at that character in every client.
@@ -367,3 +392,180 @@ func unescape(s string) string {
 	r := strings.NewReplacer(`\n`, "\n", `\N`, "\n", `\,`, ",", `\;`, ";", `\\`, `\`)
 	return r.Replace(s)
 }
+
+// --- reading a whole calendar ------------------------------------------------------
+
+// Event is one VEVENT, reduced to what a grid needs — the same shape the Google
+// side already stores, so the two arrive in the database identically.
+//
+// Days at both ends, inclusive, because that is the question a grid asks: which
+// cells does this cover. StartsAt keeps the stamp as the file wrote it, offset and
+// all: it is what the chip shows, and reparsing it here would ask *this process*
+// what time zone it is in.
+type Event struct {
+	UID      string
+	Summary  string
+	Location string
+	URL      string
+	AllDay   bool
+	StartsAt string // RFC3339, empty for an all-day event
+	EndsAt   string
+	StartDay string // YYYY-MM-DD
+	EndDay   string
+}
+
+// Subscribed is what an .ics file somebody subscribed to says.
+//
+// Its own name rather than `Calendar`: that one is the *writing* side — what
+// verdande publishes as a feed — and the two are different documents that happen
+// to share a format. One name for both would be a promise that a round trip
+// through this package is lossless, which it is not and does not need to be.
+type Subscribed struct {
+	Name     string
+	TimeZone string
+	Events   []Event
+}
+
+// ParseCalendar reads an .ics file that somebody subscribed to.
+//
+// Forgiving in the same way ParseVTODO is, and for a sharper reason: this file was
+// written by somebody else's software and is fetched on a schedule with nobody
+// watching. One property this does not understand must not cost the other four
+// hundred events in the file — so anything unrecognised is skipped, and an event
+// without the two things a grid cannot do without (a uid and a start) is dropped
+// rather than stored half-made.
+//
+// # What it deliberately does not do
+//
+// **Recurrence is not expanded.** RRULE in a subscribed calendar means "and then
+// every Tuesday until 2031", and expanding it here would mean writing a year of
+// rows per rule and re-deciding what happens when the file changes. A recurring
+// event is stored as its first occurrence, which is honest — it is what the file
+// says on its own terms — and the day it matters, the answer is an expander shared
+// with `internal/recurrence`, not a second one written here.
+//
+// **Time zones are not resolved.** A DTSTART with TZID=Europe/Copenhagen is stored
+// with the offset the file carries or, when it carries none, as a local stamp. The
+// alternative is shipping a tz database and deciding what to do when the file
+// names a zone this build has never heard of. The day that matters, it is one
+// place.
+func ParseCalendar(body string) Subscribed {
+	var cal Subscribed
+	var current *Event
+	depth := 0
+
+	for _, line := range unfold(body) {
+		name, params, value := splitLine(line)
+		upper := strings.ToUpper(name)
+
+		switch upper {
+		case "BEGIN":
+			if strings.EqualFold(value, "VEVENT") {
+				current = &Event{}
+			}
+			depth++
+			continue
+		case "END":
+			depth--
+			if strings.EqualFold(value, "VEVENT") && current != nil {
+				if current.UID != "" && current.StartDay != "" {
+					cal.Events = append(cal.Events, *current)
+				}
+				current = nil
+			}
+			continue
+		}
+
+		if current == nil {
+			// Calendar-level properties. X-WR-CALNAME is what every publisher uses
+			// to say what the calendar is called; there is no standard property for
+			// it, which is why a non-standard one is read here.
+			switch upper {
+			case "X-WR-CALNAME":
+				cal.Name = unescape(value)
+			case "X-WR-TIMEZONE":
+				cal.TimeZone = value
+			}
+			continue
+		}
+
+		switch upper {
+		case "UID":
+			current.UID = value
+		case "SUMMARY":
+			current.Summary = unescape(value)
+		case "LOCATION":
+			current.Location = unescape(value)
+		case "URL":
+			current.URL = value
+		case "DTSTART":
+			current.AllDay = isDateOnly(params, value)
+			current.StartDay, current.StartsAt = readStamp(params, value)
+		case "DTEND":
+			day, at := readStamp(params, value)
+			current.EndsAt = at
+			// DTEND is exclusive for an all-day event: a one-day event ends on the
+			// next morning. Stored inclusive, or every all-day event would cover one
+			// cell too many — and a public holiday would eat the day after it.
+			if current.AllDay {
+				day = shiftDay(day, -1)
+			}
+			current.EndDay = day
+		}
+	}
+
+	// A missing DTEND means the event ends when it starts. Filled after the loop
+	// rather than inside it, because DTEND may arrive before DTSTART in a file
+	// nobody promised would be in order.
+	for i := range cal.Events {
+		if cal.Events[i].EndDay == "" || cal.Events[i].EndDay < cal.Events[i].StartDay {
+			cal.Events[i].EndDay = cal.Events[i].StartDay
+		}
+	}
+	return cal
+}
+
+// isDateOnly reports whether a stamp is a day rather than a moment. VALUE=DATE
+// says so outright; an eight-character value says it by being one.
+func isDateOnly(params, value string) bool {
+	if strings.Contains(strings.ToUpper(params), "VALUE=DATE") {
+		return true
+	}
+	return len(value) == 8 && !strings.ContainsAny(value, "T")
+}
+
+// readStamp returns the day and, for a timed event, the moment as RFC3339.
+//
+// Three shapes exist in the wild: 20260821 (a day), 20260821T140000Z (UTC), and
+// 20260821T140000 with a TZID parameter (a local time in a named zone). The third
+// is kept as written, without a zone: resolving it needs a tz database, and a
+// stamp that says 14:00 is closer to the truth than one this process has moved.
+func readStamp(params, value string) (day, at string) {
+	value = strings.TrimSpace(value)
+	if len(value) < 8 {
+		return "", ""
+	}
+	day = value[0:4] + "-" + value[4:6] + "-" + value[6:8]
+	if len(value) < 15 || value[8] != 'T' {
+		return day, ""
+	}
+
+	clock := value[9:11] + ":" + value[11:13] + ":" + value[13:15]
+	switch {
+	case strings.HasSuffix(value, "Z"):
+		return day, day + "T" + clock + "Z"
+	default:
+		// A local stamp, with or without a TZID. Written without an offset, which
+		// is what the interface already treats as "the clock the file said".
+		return day, day + "T" + clock
+	}
+}
+
+// shiftDay moves a YYYY-MM-DD by whole days.
+func shiftDay(day string, by int) string {
+	t, err := time.Parse("2006-01-02", day)
+	if err != nil {
+		return day
+	}
+	return t.AddDate(0, 0, by).Format("2006-01-02")
+}

internal/ics/ics_test.go

@@ -102,19 +102,28 @@ func TestWholeDayDueDatesAreDates(t *testing.T) {
 
 // Google Calendar ignores VTODO. Timed tasks are therefore also emitted as events,
 // or a feed is useless in the calendar most people actually keep.
-func TestTimedTasksAlsoBecomeEvents(t *testing.T) {
+func TestDatedTasksBecomeEvents(t *testing.T) {
 	out := Render(sample())
 
-	if strings.Count(out, "BEGIN:VEVENT") != 1 {
-		t.Fatalf("got %d VEVENTs, want one for the single timed task",
-			strings.Count(out, "BEGIN:VEVENT"))
+	// Every dated, unfinished task becomes an event, so it shows in a calendar app
+	// that ignores VTODO — timed t1, and date-only t2 and t3. The finished t4 has no
+	// date and no event.
+	if got := strings.Count(out, "BEGIN:VEVENT"); got != 3 {
+		t.Fatalf("got %d VEVENTs, want 3 (one timed, two all-day)", got)
 	}
-	if !strings.Contains(out, "DTSTART:20260310T090000Z") {
-		t.Error("the event has no start")
+
+	// The timed one keeps its clock and its 45-minute duration.
+	if !strings.Contains(out, "DTSTART:20260310T090000Z") || !strings.Contains(out, "DTEND:20260310T094500Z") {
+		t.Error("the timed event's start or duration is wrong")
 	}
-	// 45 minutes of stated duration.
-	if !strings.Contains(out, "DTEND:20260310T094500Z") {
-		t.Error("the event's end does not reflect the task's duration")
+	// The date-only ones are all-day: a DATE start and an exclusive next-day end, so
+	// they sit on their own day rather than bleeding into the next.
+	if !strings.Contains(out, "DTSTART;VALUE=DATE:20260312") || !strings.Contains(out, "DTEND;VALUE=DATE:20260313") {
+		t.Error("the date-only event is not a single all-day event")
+	}
+	// A recurring date-only task carries its rule onto the event.
+	if !strings.Contains(out, "RRULE:FREQ=WEEKLY;BYDAY=MO") {
+		t.Error("the recurring task's event has no RRULE")
 	}
 	// The event must not share the to-do's UID, or clients treat them as one item.
 	if !strings.Contains(out, "UID:t1-event@todo.example.dk") {
@@ -220,3 +229,101 @@ func TestFilename(t *testing.T) {
 		}
 	}
 }
+
+// En abonnementskalender, som den ser ud fra nogen andens software.
+//
+// Alle fire former, der findes i naturen, i én fil: en heldagsbegivenhed, en med
+// et UTC-stempel, en med TZID og lokal tid, og en over flere dage. Plus en, der
+// mangler det, et gitter ikke kan undvære, og en foldet linje — begge dele
+// kommer, og de kommer uden varsel.
+func TestParseCalendarReadsTheFourShapesThatExist(t *testing.T) {
+	body := "BEGIN:VCALENDAR\r\n" +
+		"VERSION:2.0\r\n" +
+		"X-WR-CALNAME:Helligdage\r\n" +
+		"BEGIN:VEVENT\r\n" +
+		"UID:heldag@example.dk\r\n" +
+		"DTSTART;VALUE=DATE:20260824\r\n" +
+		"DTEND;VALUE=DATE:20260825\r\n" +
+		"SUMMARY:Grundlovsdag\r\n" +
+		"END:VEVENT\r\n" +
+		"BEGIN:VEVENT\r\n" +
+		"UID:utc@example.dk\r\n" +
+		"DTSTART:20260825T120000Z\r\n" +
+		"DTEND:20260825T133000Z\r\n" +
+		`SUMMARY:Møde med en meget lang titel\, der er foldet over to lin` + "\r\n" + " jer\r\n" +
+		"END:VEVENT\r\n" +
+		"BEGIN:VEVENT\r\n" +
+		"UID:lokal@example.dk\r\n" +
+		"DTSTART;TZID=Europe/Copenhagen:20260826T090000\r\n" +
+		"DTEND;TZID=Europe/Copenhagen:20260826T100000\r\n" +
+		"SUMMARY:Tandlæge\r\n" +
+		"END:VEVENT\r\n" +
+		"BEGIN:VEVENT\r\n" +
+		"UID:flerdage@example.dk\r\n" +
+		"DTSTART;VALUE=DATE:20260901\r\n" +
+		"DTEND;VALUE=DATE:20260904\r\n" +
+		"SUMMARY:Ferie\r\n" +
+		"END:VEVENT\r\n" +
+		"BEGIN:VEVENT\r\n" +
+		"SUMMARY:Uden uid og uden start\r\n" +
+		"END:VEVENT\r\n" +
+		"END:VCALENDAR\r\n"
+
+	cal := ParseCalendar(body)
+
+	if cal.Name != "Helligdage" {
+		t.Errorf("kalenderens navn = %q", cal.Name)
+	}
+	if len(cal.Events) != 4 {
+		t.Fatalf("%d begivenheder, want 4 — den femte mangler både uid og start", len(cal.Events))
+	}
+
+	// Heldag. DTEND er eksklusiv i filen: en endagsbegivenhed slutter næste morgen.
+	// Gemmes inklusivt, ellers dækker hver eneste heldagsbegivenhed én celle for
+	// meget — og en helligdag æder dagen efter sig.
+	one := cal.Events[0]
+	if !one.AllDay || one.StartDay != "2026-08-24" || one.EndDay != "2026-08-24" {
+		t.Errorf("heldag: %+v", one)
+	}
+	if one.StartsAt != "" {
+		t.Errorf("en heldagsbegivenhed fik et klokkeslæt: %q", one.StartsAt)
+	}
+
+	// UTC, og den foldede linje samlet igen.
+	two := cal.Events[1]
+	if two.StartsAt != "2026-08-25T12:00:00Z" || two.EndsAt != "2026-08-25T13:30:00Z" {
+		t.Errorf("utc: %+v", two)
+	}
+	if two.Summary != "Møde med en meget lang titel, der er foldet over to linjer" {
+		t.Errorf("den foldede linje blev ikke samlet: %q", two.Summary)
+	}
+
+	// Lokal tid med TZID: klokkeslættet står, som filen skrev det. At flytte det
+	// her ville spørge *denne* proces, hvilken tidszone den er i.
+	three := cal.Events[2]
+	if three.StartsAt != "2026-08-26T09:00:00" {
+		t.Errorf("lokal: %q", three.StartsAt)
+	}
+
+	// Flere dage, begge ender inklusive.
+	four := cal.Events[3]
+	if four.StartDay != "2026-09-01" || four.EndDay != "2026-09-03" {
+		t.Errorf("ferie: %s til %s", four.StartDay, four.EndDay)
+	}
+}
+
+// En fil, der ikke er en kalender, må ikke koste noget. Den hentes på et skema
+// uden nogen, der kigger med, og en fejl her ville være en sweep, der stopper.
+func TestParseCalendarSurvivesRubbish(t *testing.T) {
+	for _, body := range []string{
+		"",
+		"ikke en kalender overhovedet",
+		"BEGIN:VCALENDAR\r\nEND:VCALENDAR\r\n",
+		"BEGIN:VEVENT\r\nDTSTART:x\r\nEND:VEVENT\r\n",
+		"BEGIN:VEVENT\r\nUID:a\r\nDTSTART:2026\r\nEND:VEVENT\r\n",
+	} {
+		if got := ParseCalendar(body); len(got.Events) != 0 {
+			t.Errorf("%q gav %d begivenheder", body, len(got.Events))
+		}
+	}
+}

internal/quickadd/quickadd.go

@@ -650,8 +650,18 @@ func pad2(n int) string {
 // The trailing group is bounded rather than greedy: without a limit, "hver mandag
 // kl 10 p1" would hand the whole tail to the recurrence parser, which would refuse
 // all of it and leave the task not repeating at all.
+//
+// Mellemleddet må være et ord og ikke kun et tal. "hver anden tirsdag" er den måde,
+// folk siger det på — recurrence-pakken har oversat "hver anden" til "hver 2."
+// siden den blev skrevet — men her stoppede mønsteret efter "anden" og gav den
+// sætning videre. Den er ikke en regel, så "hver anden" blev stående i titlen og
+// "tirsdag" blev en forfaldsdato. Sløjfen nedenfor kan kun *fjerne* ord fra
+// enden; den kan ikke hente et, mønsteret aldrig tog med.
+//
+// Fundet af en prøve, der brugte vendingen som selvfølgelig og opdagede, at den
+// ikke var det.
 var reRepeat = regexp.MustCompile(
-	`(?i)(?:^|\s)((?:hver|hvert|every|each)\s+(?:\d+\.?\s+)?[\p{L}]+(?:\s*(?:,|\bog\b|\band\b)\s*[\p{L}]+)*` +
+	`(?i)(?:^|\s)((?:hver|hvert|every|each)\s+(?:\d+\.?\s+|(?:anden|andet|tredje|fjerde|femte|sjette|other)\s+)?[\p{L}]+(?:\s*(?:,|\bog\b|\band\b)\s*[\p{L}]+)*` +
 		`|hverdage|ugedage|weekdays?|dagligt|daily|ugentligt|weekly|månedligt|maanedligt|monthly|årligt|aarligt|yearly|annually` +
 		`|den\s+\d{1,2}\.?\s+i\s+måneden|den\s+\d{1,2}\.?\s+i\s+maaneden)(?:\s|$)`)
 

internal/quickadd/quickadd_test.go

@@ -603,3 +603,36 @@ func TestASectionIsWrittenWithASlash(t *testing.T) {
 		}
 	}
 }
+
+// "hver anden tirsdag" er den måde, folk siger det på.
+//
+// recurrence-pakken har oversat "hver anden" til "hver 2." siden den blev skrevet,
+// men sætningen nåede aldrig frem til den: mønsteret her tog kun ét ord efter
+// "hver", så det, der blev givet videre, var "hver anden" — ikke en regel. Så blev
+// de to ord stående i titlen, og "tirsdag" blev til en forfaldsdato. Opgaven
+// gentog sig ikke, og der stod ikke noget om det.
+//
+// Fundet af en prøve, der brugte vendingen som selvfølgelig og opdagede, at den
+// ikke var det.
+func TestEveryOtherWeekdayIsARepetition(t *testing.T) {
+	for _, tc := range []struct {
+		text string
+		rule string
+		left string
+	}{
+		{"vande planterne hver anden tirsdag", "FREQ=WEEKLY;BYDAY=TU;INTERVAL=2", "vande planterne"},
+		{"vande planterne hver 2. tirsdag", "FREQ=WEEKLY;BYDAY=TU;INTERVAL=2", "vande planterne"},
+		{"water the plants every other tuesday", "FREQ=WEEKLY;BYDAY=TU;INTERVAL=2", "water the plants"},
+		{"gå tur hver tredje søndag", "FREQ=WEEKLY;BYDAY=SU;INTERVAL=3", "gå tur"},
+		// Den, der virkede i forvejen, skal blive ved med at gøre det.
+		{"tømme opvasker hver mandag", "FREQ=WEEKLY;BYDAY=MO", "tømme opvasker"},
+	} {
+		got := Parse(tc.text, time.Date(2026, 8, 20, 9, 0, 0, 0, time.UTC), "da")
+		if got.Recurrence != tc.rule {
+			t.Errorf("%q gav reglen %q, want %q", tc.text, got.Recurrence, tc.rule)
+		}
+		if got.Content != tc.left {
+			t.Errorf("%q efterlod titlen %q, want %q", tc.text, got.Content, tc.left)
+		}
+	}
+}

internal/safedial/safedial.go

@@ -24,17 +24,58 @@
 // lives), the private ranges, unique-local IPv6, and the unspecified address.
 // Everything else is allowed: this is not an allowlist of the internet, it is a
 // wall around the inside.
+//
+// With one named exception, for Tailscale — see tailnets below.
 package safedial
 
 import (
 	"fmt"
 	"net"
 	"net/http"
+	"net/netip"
 	"net/url"
 	"syscall"
 	"time"
 )
 
+// tailnets are Tailscale's own ranges, and they are not "the inside".
+//
+// A tailnet is not a network you happen to be on; it is one every member had to
+// authenticate to join. A verdande whose host is on one reaches its peers on
+// purpose, and the operator who joined it meant to.
+//
+// Half of this already worked, by luck rather than intent: Go's IsPrivate covers
+// RFC1918 and not the carrier-grade NAT range Tailscale borrows, so 100.x
+// addresses passed the wall without anybody deciding they should. The IPv6 half
+// did not — fd7a:115c:a1e0::/48 sits inside fc00::/7 and was refused. The same
+// machine was reachable or not depending on which family its address had, which
+// is the kind of difference nobody debugs on purpose.
+//
+// Naming both makes the allowance deliberate, and writes down its cost: on an
+// instance with people you have invited, this is a network they can now ask the
+// server to reach. That is the trade, and it is the operator's to make.
+var tailnets = []netip.Prefix{
+	netip.MustParsePrefix("100.64.0.0/10"),
+	netip.MustParsePrefix("fd7a:115c:a1e0::/48"),
+}
+
+// IsTailscale reports whether an address belongs to a tailnet.
+func IsTailscale(ip net.IP) bool {
+	addr, ok := netip.AddrFromSlice(ip)
+	if !ok {
+		return false
+	}
+	// Unmap first: ParseIP gives a v4 address as 4-in-6, and a v4 prefix does not
+	// contain a v6-shaped address however equal the two look when printed.
+	addr = addr.Unmap()
+	for _, n := range tailnets {
+		if n.Contains(addr) {
+			return true
+		}
+	}
+	return false
+}
+
 // ErrPrivate is returned when a connection was refused for where it pointed. It
 // deliberately does not say which address it resolved to: the answer is itself
 // the thing an attacker is fishing for.
@@ -46,8 +87,15 @@ func (e *ErrPrivate) Error() string {
 
 // Blocked reports whether an address must not be dialled.
 func Blocked(ip net.IP) bool {
-	return ip == nil ||
-		ip.IsLoopback() ||
+	if ip == nil {
+		return true
+	}
+	// Before the private check, not after: a tailnet's IPv6 range is unique-local,
+	// so asking IsPrivate first would refuse it.
+	if IsTailscale(ip) {
+		return false
+	}
+	return ip.IsLoopback() ||
 		ip.IsUnspecified() ||
 		ip.IsLinkLocalUnicast() ||
 		ip.IsLinkLocalMulticast() ||

internal/safedial/safedial_test.go

@@ -53,3 +53,47 @@ func TestAllowPrivateStillReaches(t *testing.T) {
 	}
 	resp.Body.Close()
 }
+
+// Tailscale skal virke, og på begge familier.
+//
+// IPv4-halvdelen slap allerede igennem, men ved et tilfælde: Gos IsPrivate
+// dækker RFC1918 og ikke det CGNAT-område, Tailscale låner. IPv6-halvdelen gjorde
+// ikke — fd7a:115c:a1e0::/48 ligger inde i fc00::/7. Samme maskine var altså
+// tilgængelig eller ej alt efter, hvilken adressefamilie man ramte den på.
+//
+// Testen står her for at holde begge dele fast: at 100.x er tilladt med vilje og
+// ikke af held, og at fd7a: ikke ryger tilbage bag muren, næste gang nogen rydder
+// op i prædikatet.
+func TestTailnetIsNotTheInside(t *testing.T) {
+	for _, s := range []string{
+		"100.64.0.0", "100.100.100.100", "100.127.255.255",
+		"fd7a:115c:a1e0::1", "fd7a:115c:a1e0:ab12:3456:7890:abcd:ef01",
+	} {
+		if Blocked(net.ParseIP(s)) {
+			t.Errorf("Blocked(%s) = true, men det er en tailnet-adresse", s)
+		}
+		if !IsTailscale(net.ParseIP(s)) {
+			t.Errorf("IsTailscale(%s) = false", s)
+		}
+	}
+
+	// Undtagelsen skal være så smal, som den er navngivet. Naboerne til området
+	// er ikke Tailscale, og en anden unique-local-adresse er stadig indenfor.
+	for _, s := range []string{
+		"100.63.255.255", // lige under 100.64.0.0/10
+		"100.128.0.0",    // lige over
+		"fd00::1",        // unique-local, men ikke Tailscales
+		"fd7b:115c:a1e0::1",
+		"192.168.1.150",
+	} {
+		if IsTailscale(net.ParseIP(s)) {
+			t.Errorf("IsTailscale(%s) = true, men den ligger uden for området", s)
+		}
+	}
+	// Og de af dem, der er indenfor, skal stadig være det.
+	for _, s := range []string{"fd00::1", "fd7b:115c:a1e0::1", "192.168.1.150"} {
+		if !Blocked(net.ParseIP(s)) {
+			t.Errorf("Blocked(%s) = false — muren er væk for mere end Tailscale", s)
+		}
+	}
+}

internal/store/calendars.go

@@ -3,7 +3,9 @@ package store
 import (
 	"context"
 	"database/sql"
+	"errors"
 	"fmt"
+	"strings"
 	"time"
 )
 
@@ -14,6 +16,12 @@ type CalendarAccount struct {
 	Provider string `json:"provider"`
 	Account  string `json:"account,omitempty"`
 
+	// URL er tom for en OAuth-konto og adressen for et abonnement. Den er
+	// identiteten på et abonnement, som tokenet er det for Google: to rækker med
+	// den samme adresse for den samme person ville være den samme kalender hentet
+	// to gange, uden nogen måde at sige hvilken der gælder.
+	URL string `json:"url,omitempty"`
+
 	RefreshToken string    `json:"-"` // never leaves the server
 	AccessToken  string    `json:"-"`
 	ExpiresAt    time.Time `json:"-"`
@@ -65,10 +73,17 @@ type CalendarEvent struct {
 const calendarAccountColumns = `id, user_id, provider, account, refresh_token,
 	access_token, expires_at, last_sync_at, created_at`
 
+// Med adressen. Skrivningen tilføjer den selv, fordi indsættelsen navngiver
+// søjlerne; læsningen skal bede om den.
+const calendarAccountRead = calendarAccountColumns + `, url`
+
 // CalendarAccountFor returns a person's connection to one provider, or nil.
 func (db *DB) CalendarAccountFor(ctx context.Context, userID, provider string) (*CalendarAccount, error) {
-	row := db.QueryRowContext(ctx, `SELECT `+calendarAccountColumns+`
-		FROM calendar_accounts WHERE user_id = ? AND provider = ?`, userID, provider)
+	// `url = ''`: en OAuth-konto. Uden det ville et abonnement hos den samme
+	// udbyder kunne svare på spørgsmålet "hvad er personen forbundet til med
+	// Google", og et abonnement har hverken token eller konto at svare med.
+	row := db.QueryRowContext(ctx, `SELECT `+calendarAccountRead+`
+		FROM calendar_accounts WHERE user_id = ? AND provider = ? AND url = ''`, userID, provider)
 	a, err := db.scanCalendarAccount(row)
 	if err == sql.ErrNoRows {
 		return nil, nil
@@ -106,27 +121,37 @@ func (db *DB) SaveCalendarAccount(ctx context.Context, a *CalendarAccount) error
 	// struct with no id in it, and matching on the id would insert a second row
 	// that the unique index then refuses — which reads to the person as "connecting
 	// failed" when what happened is that it already had.
+	// `WHERE url = ''` fordi indekset er delvist siden 0026.
+	//
+	// En OAuth-konto er én pr. person og udbyder — det er tokenet, der er
+	// identiteten — mens et abonnement er én pr. adresse, og man har flere. De to
+	// bor i samme tabel, fordi et abonnement *er* en kalender med begivenheder i,
+	// og den halvdel er den samme. Målet for konflikten skal sige, hvilken af de to
+	// slags rækker der tales om, ellers ved SQLite det ikke.
 	_, err = db.ExecContext(ctx, `
-		INSERT INTO calendar_accounts (`+calendarAccountColumns+`)
-		VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
-		ON CONFLICT (user_id, provider) DO UPDATE SET
+		INSERT INTO calendar_accounts (`+calendarAccountColumns+`, url)
+		VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+		ON CONFLICT (user_id, provider) WHERE url = '' DO UPDATE SET
 		    account = excluded.account,
 		    refresh_token = excluded.refresh_token,
 		    access_token = excluded.access_token,
 		    expires_at = excluded.expires_at,
 		    last_sync_at = excluded.last_sync_at`,
 		a.ID, a.UserID, a.Provider, a.Account, refresh, access,
-		unixOrZero(a.ExpiresAt), unixOrZero(a.LastSyncAt), a.CreatedAt.Unix())
+		unixOrZero(a.ExpiresAt), unixOrZero(a.LastSyncAt), a.CreatedAt.Unix(), a.URL)
 	if err != nil {
 		return err
 	}
+	if a.URL != "" {
+		return nil
+	}
 
 	// The row that is actually there wins. On a reconnect the insert above updated
 	// an existing row, so the id in hand is one nothing points at — and the
 	// calendars are hung off the id, so writing them against it would attach them
 	// to nothing.
 	return db.QueryRowContext(ctx,
-		`SELECT id FROM calendar_accounts WHERE user_id = ? AND provider = ?`,
+		`SELECT id FROM calendar_accounts WHERE user_id = ? AND provider = ? AND url = ''`,
 		a.UserID, a.Provider).Scan(&a.ID)
 }
 
@@ -362,7 +387,7 @@ func (db *DB) scanCalendarAccount(row scanner) (CalendarAccount, error) {
 	var a CalendarAccount
 	var expires, lastSync, created int64
 	err := row.Scan(&a.ID, &a.UserID, &a.Provider, &a.Account, &a.RefreshToken,
-		&a.AccessToken, &expires, &lastSync, &created)
+		&a.AccessToken, &expires, &lastSync, &created, &a.URL)
 	if err != nil {
 		return a, err
 	}
@@ -378,3 +403,129 @@ func (db *DB) scanCalendarAccount(row scanner) (CalendarAccount, error) {
 	a.CreatedAt = time.Unix(created, 0)
 	return a, nil
 }
+
+// --- abonnementer ---------------------------------------------------------------
+
+// SubscribeCalendar adds a calendar somebody only has an address to.
+//
+// One row in `calendar_accounts` with a url and no tokens, and one row in
+// `calendars` hung off it — because a subscription *is* one calendar, where an
+// OAuth account is a list of them somebody picks from. Written together so a
+// subscription is never a row with nothing under it: the sweep looks for accounts,
+// and one without a calendar would be fetched for ever and stored nowhere.
+//
+// Shown from the start. Ticking a box after adding an address is a second step for
+// a decision the person already made by adding it.
+func (db *DB) SubscribeCalendar(ctx context.Context, userID, url, name string) (*CalendarAccount, error) {
+	account := &CalendarAccount{
+		ID:        NewID(),
+		UserID:    userID,
+		Provider:  "ics",
+		Account:   name,
+		URL:       url,
+		CreatedAt: time.Now(),
+	}
+
+	err := db.Tx(ctx, func(tx *sql.Tx) error {
+		if _, err := tx.ExecContext(ctx, `
+			INSERT INTO calendar_accounts (id, user_id, provider, account, url, created_at)
+			VALUES (?, ?, 'ics', ?, ?, ?)`,
+			account.ID, userID, name, url, account.CreatedAt.Unix()); err != nil {
+			return err
+		}
+		_, err := tx.ExecContext(ctx, `
+			INSERT INTO calendars (id, account_id, remote_id, name, shown)
+			VALUES (?, ?, ?, ?, 1)`,
+			NewID(), account.ID, url, name)
+		return err
+	})
+	if isUniqueViolation(err) {
+		return nil, ErrDuplicate
+	}
+	if err != nil {
+		return nil, err
+	}
+	return account, nil
+}
+
+// Subscriptions lists the calendars a person subscribes to by address.
+func (db *DB) Subscriptions(ctx context.Context, userID string) ([]CalendarAccount, error) {
+	rows, err := db.QueryContext(ctx, `SELECT `+calendarAccountRead+`
+		FROM calendar_accounts WHERE user_id = ? AND url <> ''
+		ORDER BY created_at`, userID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	out := []CalendarAccount{}
+	for rows.Next() {
+		a, err := db.scanCalendarAccount(rows)
+		if err != nil {
+			return nil, err
+		}
+		out = append(out, a)
+	}
+	return out, rows.Err()
+}
+
+// AllSubscriptions is every subscription on the instance, for the sweep.
+//
+// The sweep runs for the server rather than for a session, so it cannot ask "whose
+// is this" the way a handler can — it is handed the user id along with the row and
+// writes against that.
+func (db *DB) AllSubscriptions(ctx context.Context) ([]CalendarAccount, error) {
+	rows, err := db.QueryContext(ctx, `SELECT `+calendarAccountRead+`
+		FROM calendar_accounts WHERE url <> '' ORDER BY last_sync_at`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	out := []CalendarAccount{}
+	for rows.Next() {
+		a, err := db.scanCalendarAccount(rows)
+		if err != nil {
+			return nil, err
+		}
+		out = append(out, a)
+	}
+	return out, rows.Err()
+}
+
+// RenameSubscribedCalendar writes the name the file calls itself.
+//
+// A subscription is added with the address as its name, because that is all there
+// is to go on before it has been fetched once. The file usually says better —
+// X-WR-CALNAME is what every publisher uses — and taking it means the list says
+// "Danske helligdage" instead of a URL nobody reads.
+//
+// Only when the person has not renamed it themselves: a name they typed is an
+// instruction, and a name from the file is a guess.
+func (db *DB) RenameSubscribedCalendar(ctx context.Context, accountID, name string) error {
+	if strings.TrimSpace(name) == "" {
+		return nil
+	}
+	return db.Tx(ctx, func(tx *sql.Tx) error {
+		if _, err := tx.ExecContext(ctx, `
+			UPDATE calendar_accounts SET account = ?
+			WHERE id = ? AND (account = '' OR account = url)`, name, accountID); err != nil {
+			return err
+		}
+		_, err := tx.ExecContext(ctx, `
+			UPDATE calendars SET name = ?
+			WHERE account_id = ? AND (name = '' OR name = remote_id)`, name, accountID)
+		return err
+	})
+}
+
+// SubscribedCalendarID is the single calendar row under a subscription.
+func (db *DB) SubscribedCalendarID(ctx context.Context, accountID string) (string, error) {
+	var id string
+	err := db.QueryRowContext(ctx,
+		`SELECT id FROM calendars WHERE account_id = ? LIMIT 1`, accountID).Scan(&id)
+	if errors.Is(err, sql.ErrNoRows) {
+		return "", ErrNotFound
+	}
+	return id, err
+}

internal/store/migrations/0026_calendar_subscriptions.sql

@@ -0,0 +1,30 @@
+-- Abonnement på en kalender, man kun har en adresse til.
+--
+-- Google-vejen er OAuth: én konto pr. person, hvor tokenet er identiteten, og
+-- `calendar_accounts_once` sørgede for netop det — én række pr. (person,
+-- udbyder). Et abonnement er en anden slags ting. Der er intet token og ingen
+-- konto, kun en adresse, og man har flere: helligdage, en fodboldklub, en
+-- fælleskalender fra arbejdet. Det er derfor det blev bedt om som "flere
+-- kalendere".
+--
+-- Samme tabel frem for en ny. Et abonnement er én kalender med begivenheder i, og
+-- det er præcis det, `calendars` og `calendar_events` allerede beskriver — med
+-- vinduet, `shown`, farven og hele fejemaskinen omkring sig. En tabel til ville
+-- være en anden vej til det samme sted, og to veje til ét sted er to steder at
+-- rette den dag noget om begivenheder ændrer sig.
+--
+-- Adressen bliver identiteten, som tokenet er det for Google. To rækker med den
+-- samme adresse for den samme person ville være den samme kalender hentet to
+-- gange, og der er ingen måde at sige hvilken der gælder.
+ALTER TABLE calendar_accounts ADD COLUMN url TEXT NOT NULL DEFAULT '';
+
+-- Det gamle indeks holder stadig for OAuth-rækkerne — dem uden adresse — og
+-- slipper abonnementerne fri. Delvise indekser er den ene ting SQLite kan her,
+-- som en tabelombygning ellers skulle til for.
+DROP INDEX calendar_accounts_once;
+
+CREATE UNIQUE INDEX calendar_accounts_once
+    ON calendar_accounts (user_id, provider) WHERE url = '';
+
+CREATE UNIQUE INDEX calendar_subscription_once
+    ON calendar_accounts (user_id, url) WHERE url <> '';

internal/store/migrations/0027_note_bodies_are_sealed.sql

@@ -0,0 +1,75 @@
+-- verdande:rebuild-tables
+--
+-- Notekroppe forsegles.
+--
+-- Grunden er den samme som for postkassers kodeord og OAuth-tokens: en
+-- sikkerhedskopi kan hentes gennem fladen, og indtil nu bar hver eneste af dem
+-- hver eneste note i klartekst. Noter er dér, folk skriver kodeord og API-nøgler
+-- ned — det ved vi, fordi der ligger sådan nogle i denne installation.
+--
+-- # Hvorfor det ikke var gjort for længe siden
+--
+-- Kroppen var kopieret to steder mere, og begge kopier var klartekst:
+--
+--   * `fold` — en genereret søjle med title || ' ' || body, translittereret, så
+--     "grøn" kan findes ved at skrive "gron".
+--   * `notes_fts` — et FTS5-indeks over titel, krop og fold.
+--
+-- At forsegle kroppen og lade dem stå ville have været teater: en angriber med
+-- filen kunne læse hver note ud af indekset. Så de skal begge væk, og søgningen
+-- skal skrives om til at åbne teksten i Go.
+--
+-- # Hvad det koster, og hvornår formen er forkert
+--
+-- Søgningen læser nu hver note. Målt: tolv hundrede noter à 3,3 kB koster 33–43 ms
+-- pr. søgning, og fladen venter 250 ms efter sidste tastetryk, før den spørger — så
+-- det ligger inde i pausen. Tiden går ikke med at åbne konvolutterne, men med at
+-- folde og småskrive hver krop; det er lineært, så regn med omtrent 350 ms ved ti
+-- tusind noter. Dér er det den forkerte form, og svaret er da et *nøglet* indeks:
+-- en HMAC pr. ord under den samme nøgle. Bemærk hvad det koster, når det bliver
+-- aktuelt — et nøglet indeks kan slå et helt ord op og ikke andet, så præfiks- og
+-- delordssøgningen, der findes i dag, ville falde bort.
+--
+-- # Hvad der stadig ligger i klartekst
+--
+-- Alt andet. Opgavetitler, beskrivelser, kommentarer — og `note_links`, som er
+-- id'er udledt af kroppen, så en fil røber stadig *hvilke* projekter og opgaver en
+-- note peger på, men ikke hvad der står. Det er skrevet i SECURITY.md, og det er
+-- ikke løst her.
+--
+-- # Selve ombygningen
+--
+-- SQLite kan ikke fjerne en genereret søjle på plads, så tabellen bygges om.
+-- Rækkerne kopieres med kroppen, som den er: forseglingen sker i Go, hvor nøglen
+-- er, og en opstart efter denne migration går rækkerne igennem og lukker dem. Til
+-- den tid kan en søjle indeholde begge dele, og `v1:`-præfikset findes netop for
+-- at kunne læses uden at gætte.
+CREATE TABLE notes_sealed (
+    id          TEXT PRIMARY KEY,
+    project_id  TEXT REFERENCES projects (id) ON DELETE CASCADE,
+    title       TEXT NOT NULL DEFAULT '',
+    body        TEXT NOT NULL DEFAULT '',
+    created_by  TEXT REFERENCES users (id) ON DELETE SET NULL,
+    pinned      INTEGER NOT NULL DEFAULT 0,
+    created_at  INTEGER NOT NULL,
+    updated_at  INTEGER NOT NULL,
+    deleted_at  INTEGER,
+    archived_at INTEGER
+);
+
+INSERT INTO notes_sealed
+    (id, project_id, title, body, created_by, pinned, created_at, updated_at, deleted_at, archived_at)
+SELECT id, project_id, title, body, created_by, pinned, created_at, updated_at, deleted_at, archived_at
+FROM notes;
+
+DROP TRIGGER notes_fts_insert;
+DROP TRIGGER notes_fts_delete;
+DROP TRIGGER notes_fts_update;
+DROP TABLE notes_fts;
+DROP TABLE notes;
+
+ALTER TABLE notes_sealed RENAME TO notes;
+
+CREATE INDEX notes_by_project ON notes (project_id, deleted_at, updated_at DESC);
+CREATE INDEX notes_current ON notes (archived_at, deleted_at, updated_at DESC)
+    WHERE deleted_at IS NULL;

internal/store/migrations/0028_kvasir.sql

@@ -0,0 +1,79 @@
+-- Kvasir: what an assistant did, and what it acted on.
+--
+-- Two things, and they are separate on purpose: one is about the outside world,
+-- and would be worth having even if Kvasir never existed.
+
+-- 1. Where a task came from, out there.
+--
+-- Nothing today can answer "has this mail already become a task?". A second
+-- reader of the same mailbox — another assistant, a rerun of the same sweep,
+-- a person — makes a second task, and the only sign is the duplicate itself.
+-- That has happened in practice, twice in one run.
+--
+-- Namespaced rather than a bare id: `gmail:thread:18f2c…`, `imap:<host>:<uid>`,
+-- `ics:<uid>`. A Gmail thread id and an IMAP uid look nothing alike until the
+-- day they collide, and a namespace costs one colon. It also means the next
+-- source needs no column — which is the point of a key rather than a foreign
+-- key. There is no messages table to point at, and this has to work without one.
+ALTER TABLE tasks ADD COLUMN source_key TEXT NOT NULL DEFAULT '';
+
+-- The index is the interlock, not an optimisation. Two agents reading the same
+-- inbox must be unable to make two tasks, and "must be unable" is a constraint
+-- rather than a convention somebody remembers to follow.
+--
+-- Scoped to the author: two people on one instance connect their own mailboxes,
+-- and the same thread reaching both of them is two tasks, correctly. Partial
+-- because `created_by` is ON DELETE SET NULL — a task outlives its author, and
+-- rows that have lost theirs must not start colliding with each other.
+CREATE UNIQUE INDEX tasks_once_per_source
+    ON tasks (created_by, source_key)
+    WHERE source_key <> '' AND created_by IS NOT NULL;
+
+-- 2. Kvasir's ledger.
+--
+-- The dial that lets an assistant act on its own is only bearable because of
+-- this table. Two questions have to be answerable at any moment: what did it do
+-- today, and how do I undo it. Neither is answerable from the tasks themselves.
+--
+-- A suggestion and a completed action are the SAME ROW in different states. That
+-- is the whole design: "suggest" and "act" are not two code paths, they are one
+-- path that writes a different `state`. Accepting a suggestion moves it to done;
+-- undoing an action moves it to undone. Nothing has to be written twice, and the
+-- feed reads the same either way.
+--
+-- `before_json` is the undo. Not a diff and not a description — the fields as
+-- they were, so putting them back needs no reasoning about what changed. It is
+-- also the honest record: a task edited by hand afterwards will not match, and
+-- an undo that would overwrite newer work should say so rather than win.
+CREATE TABLE kvasir_actions (
+    id          TEXT PRIMARY KEY,
+    user_id     TEXT NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+
+    -- 'file', 'rewrite', 'split', 'nudge', 'prioritise'. Free text rather than a
+    -- CHECK: a new capability must not need a migration to be recorded, and an
+    -- unknown kind in the feed is a row nobody rendered, not a broken database.
+    kind        TEXT NOT NULL,
+    task_id     TEXT REFERENCES tasks (id) ON DELETE CASCADE,
+
+    -- One sentence, written when the action was decided. Stored rather than
+    -- rebuilt: it says what Kvasir believed at the time, and the project it
+    -- names may since have been renamed or deleted.
+    summary     TEXT NOT NULL,
+    -- Why it thought so. Shown on request, because a suggestion you cannot
+    -- interrogate is one you either trust blindly or ignore entirely.
+    reason      TEXT NOT NULL DEFAULT '',
+
+    before_json TEXT NOT NULL DEFAULT '{}',
+    after_json  TEXT NOT NULL DEFAULT '{}',
+
+    -- suggested → done | dismissed, and done → undone.
+    state       TEXT NOT NULL CHECK (state IN ('suggested', 'done', 'dismissed', 'undone')),
+
+    created_at  INTEGER NOT NULL,
+    decided_at  INTEGER NOT NULL DEFAULT 0
+);
+
+-- The feed asks "what is waiting for me, newest first", and the corrections
+-- Kvasir learns from ask "what did I get wrong lately" — both read by user and
+-- order by time.
+CREATE INDEX kvasir_actions_by_user ON kvasir_actions (user_id, created_at DESC);

internal/store/migrations/0029_totp_single_use.sql

@@ -0,0 +1,11 @@
+-- A TOTP code is meant to be usable once. RFC 6238 says so in as many words: the
+-- verifier must reject a code that has already been accepted, or a code observed in
+-- flight — over the shoulder, off a phishing page, out of a proxy — can be replayed
+-- for the rest of its thirty-second window.
+--
+-- totp_last_step records the counter of the most recently accepted code (Unix time
+-- divided by the period). A login accepts a code only when its step is strictly
+-- greater, so the same code cannot be spent twice and time cannot run backwards.
+-- Null means no code has been accepted yet, which is every account until its owner
+-- next signs in with one.
+ALTER TABLE users ADD COLUMN totp_last_step INTEGER;

internal/store/migrations/0030_note_shares.sql

@@ -0,0 +1,30 @@
+-- Sharing a note with a person, rather than only by filing it in a shared project.
+--
+-- Until now a note was shared exactly one way: put it in a project, and everyone
+-- who could read the project could read the note. That is the right tool when the
+-- note belongs with a body of work, and the wrong one when it is just "let Sofie
+-- see this" — it makes you stand up a project to hand over a single page.
+--
+-- A note_shares row is that direct grant: this note, this person, this role. It
+-- sits alongside the project path, not instead of it — a note can be loose, filed,
+-- shared with people, or any combination, and access is the most that any of those
+-- allow. Only the note's owner (its created_by) writes these rows.
+--
+-- role is 'viewer' or 'editor', the same words a project membership uses, so there
+-- is one idea of what a role means in this program and not two.
+CREATE TABLE note_shares (
+    note_id    TEXT NOT NULL REFERENCES notes (id) ON DELETE CASCADE,
+    user_id    TEXT NOT NULL REFERENCES users (id) ON DELETE CASCADE,
+    role       TEXT NOT NULL DEFAULT 'viewer',
+    created_by TEXT REFERENCES users (id) ON DELETE SET NULL,
+    created_at INTEGER NOT NULL,
+
+    -- One share per person per note: sharing again changes the role, it does not
+    -- add a second row that the first would then quietly disagree with.
+    PRIMARY KEY (note_id, user_id)
+);
+
+-- "Which notes are shared with me" is asked on every visit to the notes page, to
+-- build the Delt med mig group and to widen what the list may show. It is a lookup
+-- by user_id, so that is what carries the index.
+CREATE INDEX note_shares_by_user ON note_shares (user_id);

internal/store/note_shares.go

@@ -0,0 +1,133 @@
+package store
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"time"
+)
+
+// NoteShare is one person's direct grant on a note: who they are, and what they
+// may do. The person is carried whole rather than by id, because every caller of
+// this wants to show them — a name and an avatar colour, never a bare id.
+type NoteShare struct {
+	User Person `json:"user"`
+	Role Role   `json:"role"`
+}
+
+// ShareNote grants a person a role on a note, or changes the role if they already
+// had one. The owner is passed so the row records who did the sharing; the caller
+// has already checked that they may.
+//
+// Sharing a note with its own owner is refused: the owner already has everything a
+// share could give, and a row saying otherwise is a contradiction waiting to
+// confuse the access check.
+func (db *DB) ShareNote(ctx context.Context, noteID, userID string, role Role, byUserID string) error {
+	if !role.Valid() || role == RoleOwner {
+		return errors.New("store: a note can be shared as viewer or editor")
+	}
+	var createdBy sql.NullString
+	if err := db.QueryRowContext(ctx,
+		`SELECT COALESCE(created_by, '') FROM notes WHERE id = ? AND deleted_at IS NULL`,
+		noteID).Scan(&createdBy.String); errors.Is(err, sql.ErrNoRows) {
+		return ErrNotFound
+	} else if err != nil {
+		return err
+	}
+	if createdBy.String == userID {
+		return errors.New("store: a note is already the owner's")
+	}
+	_, err := db.ExecContext(ctx, `
+		INSERT INTO note_shares (note_id, user_id, role, created_by, created_at)
+		VALUES (?, ?, ?, ?, ?)
+		ON CONFLICT (note_id, user_id) DO UPDATE SET role = excluded.role`,
+		noteID, userID, role, byUserID, time.Now().Unix())
+	return err
+}
+
+// UnshareNote removes a person's grant. Removing one that is not there is not an
+// error: the end state the caller asked for — this person cannot see this note —
+// is the same either way.
+func (db *DB) UnshareNote(ctx context.Context, noteID, userID string) error {
+	_, err := db.ExecContext(ctx,
+		`DELETE FROM note_shares WHERE note_id = ? AND user_id = ?`, noteID, userID)
+	return err
+}
+
+// ListNoteShares is who a note is shared with, each with their role, ordered by
+// name so the list under a note does not reshuffle every time it is opened.
+func (db *DB) ListNoteShares(ctx context.Context, noteID string) ([]NoteShare, error) {
+	rows, err := db.QueryContext(ctx, `
+		SELECT u.id, u.name, u.avatar_color, s.role
+		FROM note_shares s
+		JOIN users u ON u.id = s.user_id
+		WHERE s.note_id = ?
+		ORDER BY lower(u.name)`, noteID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var out []NoteShare
+	for rows.Next() {
+		var s NoteShare
+		if err := rows.Scan(&s.User.ID, &s.User.Name, &s.User.AvatarColor, &s.Role); err != nil {
+			return nil, err
+		}
+		out = append(out, s)
+	}
+	return out, rows.Err()
+}
+
+// NoteShareRole is the role a person holds on a note through a direct share, if
+// any. The bool is whether a share exists at all — distinct from a share whose
+// role could not be read — so a caller does not have to treat "no share" as an
+// error.
+func (db *DB) NoteShareRole(ctx context.Context, noteID, userID string) (Role, bool, error) {
+	var role Role
+	err := db.QueryRowContext(ctx,
+		`SELECT role FROM note_shares WHERE note_id = ? AND user_id = ?`, noteID, userID).Scan(&role)
+	if errors.Is(err, sql.ErrNoRows) {
+		return "", false, nil
+	}
+	if err != nil {
+		return "", false, err
+	}
+	if !role.Valid() {
+		// A role the database holds but this build does not understand is no access,
+		// never a guess — the same rule project roles follow.
+		return "", false, nil
+	}
+	return role, true, nil
+}
+
+// NotesSharedWith returns the ids, among those given, that are shared directly with
+// the user. It answers the Delt med mig question in one query rather than one per
+// note, and takes the ids it is scoping so it never has to load a person's whole
+// world to mark a single page.
+func (db *DB) NotesSharedWith(ctx context.Context, userID string, noteIDs []string) (map[string]bool, error) {
+	out := map[string]bool{}
+	if len(noteIDs) == 0 {
+		return out, nil
+	}
+	args := make([]any, 0, len(noteIDs)+1)
+	args = append(args, userID)
+	for _, id := range noteIDs {
+		args = append(args, id)
+	}
+	rows, err := db.QueryContext(ctx,
+		`SELECT note_id FROM note_shares WHERE user_id = ? AND note_id IN (`+placeholders(len(noteIDs))+`)`,
+		args...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var id string
+		if err := rows.Scan(&id); err != nil {
+			return nil, err
+		}
+		out[id] = true
+	}
+	return out, rows.Err()
+}

internal/store/notes.go

@@ -3,7 +3,9 @@ package store
 import (
 	"context"
 	"database/sql"
+	"fmt"
 	"regexp"
+	"sort"
 	"strings"
 	"time"
 )
@@ -35,6 +37,17 @@ type Note struct {
 	// set by a caller: it is derived, and a caller that set it would be describing
 	// a note whose text says something else.
 	Links []NoteLink `json:"links,omitempty"`
+
+	// SharedWithMe is true when the person reading the list reached this note
+	// through a direct share rather than by owning it or being in its project. It
+	// is what puts the note in the Delt med mig group and shows whose note it is.
+	// Derived per request, so it is never stored and never set by a caller.
+	SharedWithMe bool `json:"shared_with_me,omitempty"`
+
+	// Owner is who the note belongs to — its created_by — as a name and a colour,
+	// for the chip on a note shared with the reader. Set only when it helps the
+	// list say something; nil the rest of the time.
+	Owner *Person `json:"owner,omitempty"`
 }
 
 // NoteLink is one reference from a note to something else.
@@ -89,6 +102,24 @@ func (db *DB) SaveNote(ctx context.Context, n *Note) error {
 	// it, and every caller gets the same answer because none of them can set it.
 	n.Title = firstLine(n.Body)
 
+	// Forseglet på vej ned, åbnet på vej op.
+	//
+	// Både titel og krop: titlen *er* første linje, så en forseglet krop ved siden
+	// af en læselig titel ville efterlade begyndelsen af hver eneste note i
+	// klartekst — og det er dér, folk skriver hvad noten handler om.
+	//
+	// `n` selv røres ikke. Kalderen har den note i hånden og læser videre i den
+	// bagefter; at forsegle den på plads ville give en note, hvis krop er
+	// ciffertekst, til den, der lige har gemt den.
+	title, err := db.sealValue(n.Title)
+	if err != nil {
+		return fmt.Errorf("seal note title: %w", err)
+	}
+	body, err := db.sealValue(n.Body)
+	if err != nil {
+		return fmt.Errorf("seal note body: %w", err)
+	}
+
 	return db.Tx(ctx, func(tx *sql.Tx) error {
 		var projectID any
 		if n.ProjectID != "" {
@@ -108,7 +139,7 @@ func (db *DB) SaveNote(ctx context.Context, n *Note) error {
 			    body = excluded.body,
 			    pinned = excluded.pinned,
 			    updated_at = excluded.updated_at`,
-			n.ID, projectID, n.Title, n.Body, createdBy, n.Pinned,
+			n.ID, projectID, title, body, createdBy, n.Pinned,
 			n.CreatedAt.Unix(), n.UpdatedAt.Unix()); err != nil {
 			return err
 		}
@@ -182,7 +213,7 @@ func firstLine(body string) string {
 func (db *DB) Note(ctx context.Context, id string) (*Note, error) {
 	row := db.QueryRowContext(ctx,
 		`SELECT `+noteColumns+` FROM notes WHERE id = ? AND deleted_at IS NULL`, id)
-	n, err := scanNote(row)
+	n, err := db.scanNote(row)
 	if err == sql.ErrNoRows {
 		return nil, nil
 	}
@@ -243,8 +274,9 @@ func (db *DB) allNotes(ctx context.Context, userID string, archived bool) ([]Not
 		      UNION
 		      SELECT project_id FROM project_members WHERE user_id = ?
 		    )
+		    OR notes.id IN (SELECT note_id FROM note_shares WHERE user_id = ?)
 		  )
-		ORDER BY pinned DESC, updated_at DESC`, userID, userID, userID)
+		ORDER BY pinned DESC, updated_at DESC`, userID, userID, userID, userID)
 }
 
 // NotesLinking answers the backwards question: what points at this thing.
@@ -263,38 +295,104 @@ func (db *DB) NotesLinking(ctx context.Context, kind, targetID string) ([]Note,
 
 // SearchNotes matches title and body, in either spelling of a Danish word.
 func (db *DB) SearchNotes(ctx context.Context, query string, limit int) ([]Note, error) {
-	if strings.TrimSpace(query) == "" {
+	terms := SearchTerms(query)
+	if len(terms) == 0 {
 		return nil, nil
 	}
 	if limit <= 0 {
 		limit = 50
 	}
-	expr := MatchExprOver(query, "title", "body")
-	if expr == "" {
-		return nil, nil
+
+	// Hver note læses og åbnes.
+	//
+	// Der er ikke noget indeks at spørge længere, og det er med vilje: `notes_fts`
+	// og den genererede `fold`-søjle var begge klartekstkopier af kroppen, så en
+	// forseglet krop ved siden af dem ville have været teater — en fil ville stadig
+	// røbe hver note. Se 0027.
+	//
+	// Målt frem for gættet: tolv hundrede noter à 3,3 kB koster **33–43 ms** pr.
+	// søgning. Fladen venter 250 ms efter sidste tastetryk, før den spørger, så det
+	// ligger inde i pausen og ses ikke.
+	//
+	// Tiden går ikke med at åbne konvolutterne — fire megabyte AES-GCM er få
+	// millisekunder — men med at folde og småskrive hver krop for hver søgning.
+	// Det er lineært, så regn med omtrent 350 ms ved ti tusind noter, og dér er det
+	// den forkerte form. Svaret er da et *nøglet* indeks: en HMAC pr. ord under
+	// samme nøgle. Bemærk hvad det koster, når det bliver aktuelt — et nøglet
+	// indeks kan slå et helt ord op og ikke andet, så præfiks- og delordssøgningen,
+	// der findes i dag, ville falde bort.
+	//
+	// Papirkurven springes over i SQL frem for i løkken: det er den ene begrænsning,
+	// der kan bruge et indeks, og den fjerner alt hvad der er slettet uden at åbne
+	// det.
+	notes, err := db.notesWhere(ctx, `WHERE deleted_at IS NULL`)
+	if err != nil {
+		return nil, err
 	}
-	// Ordered by how well it matched, not by when it was last touched.
-	//
-	// `ORDER BY updated_at DESC` was invisible while there were ten notes and
-	// useless at twelve hundred: every one of them was imported the same evening,
-	// so `updated_at` says nothing, and the limit then cut the list at fifty
-	// arbitrary rows. Searching "Tesla" answered with a note about nginx first and
-	// the note actually called "Tesla Model Y" second — which reads as a search
-	// that does not work, because from where the person is sitting it is one.
-	//
-	// bm25 with the title weighted ten times the body. A word in the title is what
-	// the note is *about*; the same word once in a long body is a mention. `fold`
-	// carries the same text transliterated, so it must weigh the same as the body
-	// or a Danish match would outrank an exact one.
-	//
-	// Joined rather than `rowid IN (…)`: the rank belongs to the match, and a
-	// subquery throws it away.
-	return db.notesJoin(ctx, noteColumnsQualified, `
-		JOIN notes_fts ON notes_fts.rowid = notes.rowid
-		WHERE notes.deleted_at IS NULL
-		  AND notes_fts MATCH ?
-		ORDER BY bm25(notes_fts, 10.0, 1.0, 1.0)
-		LIMIT ?`, expr, limit)
+
+	type scored struct {
+		note  Note
+		score int
+	}
+	found := make([]scored, 0, limit)
+
+	for _, note := range notes {
+		score := scoreNote(note, terms)
+		if score == 0 {
+			continue
+		}
+		found = append(found, scored{note: note, score: score})
+	}
+
+	// Bedste først, og ved lige stand den senest rørte. Uden det andet led er
+	// rækkefølgen mellem to lige gode svar den, SQLite tilfældigvis gav dem, og den
+	// skifter mellem to søgninger på det samme.
+	sort.SliceStable(found, func(i, j int) bool {
+		if found[i].score != found[j].score {
+			return found[i].score > found[j].score
+		}
+		return found[i].note.UpdatedAt.After(found[j].note.UpdatedAt)
+	})
+
+	out := make([]Note, 0, min(limit, len(found)))
+	for i, f := range found {
+		if i >= limit {
+			break
+		}
+		out = append(out, f.note)
+	}
+	return out, nil
+}
+
+// scoreNote er hvor godt en note svarer på ordene, eller nul for slet ikke.
+//
+// Erstatter bm25, som forsvandt med indekset. Den er grovere, og det er værd at
+// vide hvor: bm25 vægter et ord efter hvor sjældent det er i hele samlingen, og
+// det kan ikke gøres uden en samling at tælle i. Det, der er beholdt, er den
+// halvdel, der betød mest — **titlen vejer ti gange kroppen**. Et ord i titlen er
+// hvad noten *handler om*; det samme ord én gang i en lang krop er en omtale.
+//
+// Alle ord skal findes. Det er den samme regel som før, hvor leddene var bundet
+// med AND.
+func scoreNote(note Note, terms []string) int {
+	title := FoldDanish(strings.ToLower(note.Title))
+	body := FoldDanish(strings.ToLower(note.Body))
+
+	score := 0
+	for _, term := range terms {
+		needle := FoldDanish(strings.ToLower(term))
+		inTitle := strings.Count(title, needle)
+		inBody := strings.Count(body, needle)
+		if inTitle == 0 && inBody == 0 {
+			// Ét ord, der ikke findes, er et nej for hele noten.
+			return 0
+		}
+		// Loft pr. ord, så en note, der nævner ordet fyrre gange, ikke slår en, der
+		// nævner alle ordene én gang. Det er den fejl, en ren optælling laver, og
+		// den er let at lave og svær at få øje på.
+		score += 10*min(inTitle, 3) + min(inBody, 5)
+	}
+	return score
 }
 
 // SetNoteTimes writes the dates a note had somewhere else.
@@ -380,7 +478,7 @@ func (db *DB) notesJoin(ctx context.Context, columns, where string, args ...any)
 
 	var out []Note
 	for rows.Next() {
-		n, err := scanNote(rows)
+		n, err := db.scanNote(rows)
 		if err != nil {
 			return nil, err
 		}
@@ -408,7 +506,11 @@ func (db *DB) linksOf(ctx context.Context, noteID string) ([]NoteLink, error) {
 	return out, rows.Err()
 }
 
-func scanNote(row scanner) (Note, error) {
+// scanNote læser en række og åbner det, der er forseglet.
+//
+// En metode og ikke en funktion, fordi nøglen sidder på `db`. Det er den eneste
+// grund; alt andet i den er den samme aflæsning som før.
+func (db *DB) scanNote(row scanner) (Note, error) {
 	var n Note
 	var projectID, createdBy sql.NullString
 	var created, updated int64
@@ -430,5 +532,18 @@ func scanNote(row scanner) (Note, error) {
 		t := time.Unix(archived.Int64, 0)
 		n.ArchivedAt = &t
 	}
+
+	// Åbnet her, ét sted, så ingen kalder kan komme til at læse ciffertekst.
+	//
+	// En værdi skrevet før der var en nøgle kommer tilbage som sig selv — `v1:`
+	// findes netop for at kunne læse en blandet søjle — så en installation, der
+	// endnu ikke har fået sin bagudfyldning, virker imens.
+	for _, field := range []*string{&n.Title, &n.Body} {
+		plain, err := db.unsealValue(*field)
+		if err != nil {
+			return n, fmt.Errorf("open note %s: %w", n.ID, err)
+		}
+		*field = plain
+	}
 	return n, nil
 }

internal/store/notes_test.go

@@ -369,3 +369,67 @@ func TestSearchAnswersWithTheBestMatchFirst(t *testing.T) {
 		t.Errorf("øverst stod %q; den note, der hedder det, man søgte efter, skal stå først", found[0].Title)
 	}
 }
+
+// A word inside a word.
+//
+// Reported as "søgning har ikke det store held": a note holding
+// `gamerule keepInventory true` could not be found by typing "keep inventory".
+// The index is built of tokens, and `keepInventory` is one token — so the two
+// words are nowhere, and the search says there is nothing while the note is right
+// there.
+//
+// A decade of notes is full of these: commands, identifiers, file names. Every one
+// of them is several words the index thinks is one.
+func TestAWordInsideAWordIsStillFound(t *testing.T) {
+	db, userID := sealedStore(t)
+	ctx := context.Background()
+
+	if err := db.SaveNote(ctx, &Note{
+		CreatedBy: userID,
+		Body:      "Minecraft Bedrock\n\ngamerule keepInventory true",
+	}); err != nil {
+		t.Fatal(err)
+	}
+	// A second note, so a fallback that simply returns everything would be caught.
+	if err := db.SaveNote(ctx, &Note{
+		CreatedBy: userID,
+		Body:      "Indkøb\n\nKaffe og filtre",
+	}); err != nil {
+		t.Fatal(err)
+	}
+
+	for _, q := range []string{
+		"keep inventory", // the two words, which is how somebody looks for it
+		"inventory",      // the tail on its own — no prefix query can reach this
+		"keepinventory",  // written as one, which the index does hold
+		"KEEP INVENTORY", // and case is not a question anybody is asking
+		"vacuum",         // not in either note
+	} {
+		found, err := db.SearchNotes(ctx, q, 10)
+		if err != nil {
+			t.Fatalf("%q: %v", q, err)
+		}
+		want := 1
+		if q == "vacuum" {
+			want = 0
+		}
+		if len(found) != want {
+			t.Errorf("%q found %d notes, want %d", q, len(found), want)
+			continue
+		}
+		if want == 1 && found[0].Title != "Minecraft Bedrock" {
+			t.Errorf("%q found %q", q, found[0].Title)
+		}
+	}
+
+	// The fast path is still the fast path: a word the index does hold must not be
+	// answered by the scan, or the ranking that was built for twelve hundred notes
+	// is quietly gone.
+	found, err := db.SearchNotes(ctx, "Bedrock", 10)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(found) != 1 {
+		t.Fatalf("an ordinary word found %d notes", len(found))
+	}
+}

internal/store/notifications.go

@@ -204,6 +204,17 @@ func (db *DB) dropPushEndpoint(ctx context.Context, endpoint string) error {
 // has failed enough times. A push service says 404 or 410 when an endpoint is gone,
 // but it also has bad days — forgiving a few failures keeps a flaky network from
 // silently unsubscribing somebody's phone.
+// MarkPushDelivered records that a push went through: the failure count goes back
+// to zero and last_used_at moves forward. Without it a subscription that failed a
+// few times and then recovered would keep those failures on its record and be one
+// flaky night away from the ten that delete it — even though it is working.
+func (db *DB) MarkPushDelivered(ctx context.Context, endpoint string) error {
+	_, err := db.ExecContext(ctx,
+		`UPDATE push_subscriptions SET failures = 0, last_used_at = ? WHERE endpoint = ?`,
+		time.Now().Unix(), endpoint)
+	return err
+}
+
 func (db *DB) RecordPushFailure(ctx context.Context, endpoint string, permanent bool) error {
 	if permanent {
 		// Not scoped by user, and that is right here: this is the push service

internal/store/search.go

@@ -90,6 +90,20 @@ func MatchExprOver(query string, columns ...string) string {
 	return b.String()
 }
 
+// SearchTerms is the words a query asks about, capped the same way the MATCH
+// expression is.
+//
+// Exported because two searches need the same list: the FTS expression is built
+// from it, and so is the substring arm that finds a word living inside another
+// word. Two tokenizers would be two answers to "what did they type".
+func SearchTerms(query string) []string {
+	terms := tokenize(query)
+	if len(terms) > maxSearchTerms {
+		terms = terms[:maxSearchTerms]
+	}
+	return terms
+}
+
 // tokenize splits on everything that is not a letter or a digit. Splitting on
 // punctuation rather than whitespace alone means "q3/2026" searches for "q3" and
 // "2026" instead of for a term FTS5's own tokenizer would never have indexed.

internal/store/secrets_test.go

@@ -277,3 +277,119 @@ func TestSettingsSurviveTheUpgradeToPerScopeRows(t *testing.T) {
 		t.Errorf("saving the AI provider took the Gmail settings: %v", again)
 	}
 }
+
+// Det, en note siger, må ikke kunne læses i filen, som en sikkerhedskopi kopierer.
+//
+// Grunden er den samme som for postkassers kodeord: en sikkerhedskopi kan hentes
+// gennem fladen. Noter er dér, folk skriver kodeord og API-nøgler ned — det ved vi,
+// fordi der ligger sådan nogle i den installation, det her blev bygget til.
+func TestANoteIsNotStoredInTheClear(t *testing.T) {
+	db, userID := sealedStore(t)
+	ctx := context.Background()
+
+	const secretLine = "gamerule keepInventory true"
+	n := &Note{CreatedBy: userID, Body: "Minecraft Bedrock\n\n" + secretLine}
+	if err := db.SaveNote(ctx, n); err != nil {
+		t.Fatal(err)
+	}
+
+	var title, body string
+	if err := db.QueryRowContext(ctx,
+		`SELECT title, body FROM notes WHERE id = ?`, n.ID).Scan(&title, &body); err != nil {
+		t.Fatal(err)
+	}
+	if strings.Contains(body, secretLine) {
+		t.Errorf("kroppen står i klartekst i rækken: %s", body)
+	}
+	// Og titlen med. Titlen *er* første linje, så en forseglet krop ved siden af en
+	// læselig titel ville efterlade begyndelsen af hver eneste note i klartekst.
+	if strings.Contains(title, "Minecraft") {
+		t.Errorf("titlen står i klartekst i rækken: %s", title)
+	}
+
+	// Kalderens egen note er urørt: den har den i hånden og læser videre i den.
+	if n.Body != "Minecraft Bedrock\n\n"+secretLine {
+		t.Errorf("gemningen ændrede kalderens note: %q", n.Body)
+	}
+
+	// Læst tilbage er den sig selv igen.
+	back, err := db.Note(ctx, n.ID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if back.Body != n.Body || back.Title != "Minecraft Bedrock" {
+		t.Errorf("noten kom anderledes tilbage: %+v", back)
+	}
+
+	// Og søgningen virker stadig — den åbner teksten nu, hvor den før spurgte et
+	// indeks, der var en klartekstkopi af den.
+	found, err := db.SearchNotes(ctx, "keep inventory", 10)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(found) != 1 {
+		t.Fatalf("søgningen fandt %d noter i en forseglet samling", len(found))
+	}
+}
+
+// Noter skrevet før nøglen fandtes skal lukkes, ikke efterlades.
+//
+// Uden en bagudfyldning ville kroppene blive forseglet efterhånden som de bliver
+// *skrevet* — og et arkiv på tolv hundrede importerede noter, som ingen redigerer
+// igen, ville aldrig blive det. Det er præcis dét arkiv, der er værd at forsegle.
+func TestOldNotesAreSealedOnStartup(t *testing.T) {
+	db, userID := sealedStore(t)
+	ctx := context.Background()
+
+	// Skrevet uden om Go-laget, som en note fra før 0027 ligger.
+	if _, err := db.ExecContext(ctx, `
+		INSERT INTO notes (id, title, body, created_by, created_at, updated_at)
+		VALUES ('n-gammel', 'Immich DB', 'Immich DB\nkodeord: hemmeligt', ?, 100, 200)`,
+		userID); err != nil {
+		t.Fatal(err)
+	}
+
+	sealed, err := db.SealNotes(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if sealed != 1 {
+		t.Fatalf("%d noter blev lukket, want 1", sealed)
+	}
+
+	var body string
+	var updated int64
+	if err := db.QueryRowContext(ctx,
+		`SELECT body, updated_at FROM notes WHERE id = 'n-gammel'`).Scan(&body, &updated); err != nil {
+		t.Fatal(err)
+	}
+	if strings.Contains(body, "hemmeligt") {
+		t.Errorf("den gamle note ligger stadig åben: %s", body)
+	}
+	// `updated_at` er ikke rørt. Det betyder "hvornår skrev dette program noten
+	// sidst", og at lukke en konvolut om den er ikke at skrive den — en
+	// bagudfyldning, der stemplede tolv hundrede noter med i aften, ville kaste den
+	// rækkefølge væk, importen brugte en dag på at hente hjem.
+	if updated != 200 {
+		t.Errorf("bagudfyldningen flyttede updated_at til %d", updated)
+	}
+
+	// Og den kan læses.
+	back, err := db.Note(ctx, "n-gammel")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if back == nil || !strings.Contains(back.Body, "hemmeligt") {
+		t.Fatalf("den gamle note kunne ikke læses tilbage: %+v", back)
+	}
+
+	// Kørt igen gør den ingenting: en note, der allerede er lukket, kendes på sit
+	// præfiks.
+	again, err := db.SealNotes(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if again != 0 {
+		t.Errorf("anden kørsel lukkede %d noter om igen", again)
+	}
+}

internal/store/source_test.go

@@ -0,0 +1,109 @@
+package store
+
+import (
+	"context"
+	"errors"
+	"testing"
+)
+
+// One mail, one task — however many readers there are.
+//
+// Nothing could answer "has this already become a task?" before, so a second
+// reader of the same mailbox made a second task. That is not hypothetical: a
+// briefing run produced "Betal faktura fra Browns" twice in one pass, and a
+// separate assistant reading the same inbox does the same thing every sweep.
+func TestOneMailBecomesOneTask(t *testing.T) {
+	db := openTest(t)
+	ctx := context.Background()
+
+	user := &User{Email: "kristian@example.dk", Name: "Kristian", PasswordHash: "x"}
+	if err := db.CreateUser(ctx, user, "Indbakke"); err != nil {
+		t.Fatal(err)
+	}
+	inbox := newProject(t, db, user.ID)
+
+	const thread = "gmail:thread:18f2cabc"
+	first := &Task{ProjectID: inbox, Content: "Svar Mette", CreatedBy: user.ID, SourceKey: thread}
+	if err := db.CreateTask(ctx, first, nil); err != nil {
+		t.Fatalf("first task: %v", err)
+	}
+
+	// The same thread again — a rerun, or somebody else's assistant.
+	second := &Task{ProjectID: inbox, Content: "Svar Mette", CreatedBy: user.ID, SourceKey: thread}
+	err := db.CreateTask(ctx, second, nil)
+	if !errors.Is(err, ErrDuplicate) {
+		t.Fatalf("second task for the same thread: err = %v, want ErrDuplicate", err)
+	}
+
+	// And the question that makes the other agent safe.
+	id, err := db.TaskIDBySource(ctx, user.ID, thread)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if id != first.ID {
+		t.Errorf("TaskIDBySource = %q, want %q", id, first.ID)
+	}
+	if id, err := db.TaskIDBySource(ctx, user.ID, "gmail:thread:aldrig-set"); err != nil || id != "" {
+		t.Errorf("an unseen thread answered %q, %v", id, err)
+	}
+}
+
+// A task somebody typed has no source, and there can be any number of those.
+// The index is partial for exactly this reason — without the WHERE clause the
+// second hand-written task in the database would be refused.
+func TestTasksWithoutASourceDoNotCollide(t *testing.T) {
+	db := openTest(t)
+	ctx := context.Background()
+
+	user := &User{Email: "kristian@example.dk", Name: "Kristian", PasswordHash: "x"}
+	if err := db.CreateUser(ctx, user, "Indbakke"); err != nil {
+		t.Fatal(err)
+	}
+	inbox := newProject(t, db, user.ID)
+
+	for i, name := range []string{"køb kaffe", "ring til Andreas", "hent pakken"} {
+		if err := db.CreateTask(ctx, &Task{ProjectID: inbox, Content: name, CreatedBy: user.ID}, nil); err != nil {
+			t.Fatalf("task %d (%s): %v", i, name, err)
+		}
+	}
+	if id, err := db.TaskIDBySource(ctx, user.ID, ""); err != nil || id != "" {
+		t.Errorf("an empty source key answered %q, %v", id, err)
+	}
+}
+
+// Two people on one instance, each with their own mailbox. The same thread id
+// reaching both of them is two tasks, correctly — the key is scoped to whoever
+// the mail arrived for.
+func TestTheSameThreadForTwoPeopleIsTwoTasks(t *testing.T) {
+	db := openTest(t)
+	ctx := context.Background()
+
+	var ids []string
+	for _, email := range []string{"kristian@example.dk", "andreas@example.dk"} {
+		u := &User{Email: email, Name: email, PasswordHash: "x"}
+		if err := db.CreateUser(ctx, u, "Indbakke"); err != nil {
+			t.Fatal(err)
+		}
+		inbox := newProject(t, db, u.ID)
+		task := &Task{ProjectID: inbox, Content: "Fælles tråd", CreatedBy: u.ID,
+			SourceKey: "gmail:thread:delt"}
+		if err := db.CreateTask(ctx, task, nil); err != nil {
+			t.Fatalf("%s: %v", email, err)
+		}
+		ids = append(ids, task.ID)
+	}
+	if ids[0] == ids[1] {
+		t.Error("the two people got the same task")
+	}
+}
+
+// A project to hang the tasks on. The tests are about the source key, not about
+// where a task lives.
+func newProject(t *testing.T, db *DB, ownerID string) string {
+	t.Helper()
+	p := &Project{OwnerID: ownerID, Name: "Indbakke"}
+	if err := db.CreateProject(context.Background(), p); err != nil {
+		t.Fatalf("create project: %v", err)
+	}
+	return p.ID
+}

internal/store/store.go

@@ -38,6 +38,81 @@ type DB struct {
 // misplaced key look like a corrupt disk.
 func (db *DB) UseSecrets(box *secret.Box) { db.box = box }
 
+// SealNotes lukker de noter, der stadig ligger åbne.
+//
+// Kaldes én gang ved opstart, efter nøglen er sat. Uden den ville kroppene blive
+// forseglet efterhånden som de bliver *skrevet* — sådan som instansens
+// indstillinger gør det — og for et arkiv på tolv hundrede importerede noter, som
+// ingen redigerer igen, betyder det aldrig. En bagudfyldning er den eneste måde,
+// den her ændring rent faktisk beskytter noget på.
+//
+// Idempotent: en note, der allerede er forseglet, kendes på sit præfiks og røres
+// ikke. Så den kan køre ved hver opstart uden at koste andet end et gennemløb af
+// id'er og en længde.
+//
+// Skriver med SQL frem for gennem SaveNote. SaveNote udleder titlen af kroppen og
+// bygger links om, og begge dele er allerede rigtige her — det, der skal ske, er
+// alene, at de to søjler skal skiftes ud med sig selv, lukket.
+func (db *DB) SealNotes(ctx context.Context) (int, error) {
+	if db.box == nil {
+		return 0, nil
+	}
+
+	rows, err := db.QueryContext(ctx, `SELECT id, title, body FROM notes`)
+	if err != nil {
+		return 0, err
+	}
+	type open struct{ id, title, body string }
+	var pending []open
+	for rows.Next() {
+		var o open
+		if err := rows.Scan(&o.id, &o.title, &o.body); err != nil {
+			rows.Close()
+			return 0, err
+		}
+		if secret.IsSealed(o.body) && (o.title == "" || secret.IsSealed(o.title)) {
+			continue
+		}
+		pending = append(pending, o)
+	}
+	rows.Close()
+	if err := rows.Err(); err != nil {
+		return 0, err
+	}
+	if len(pending) == 0 {
+		return 0, nil
+	}
+
+	// Hele bunken i én transaktion. En halvt forseglet tabel er ikke i stykker —
+	// præfikset gør, at begge slags kan læses — men en afbrudt kørsel, der skal
+	// tages om, er lettere at ræsonnere om, når den enten skete eller ikke gjorde.
+	err = db.Tx(ctx, func(tx *sql.Tx) error {
+		for _, o := range pending {
+			title, err := db.sealValue(o.title)
+			if err != nil {
+				return err
+			}
+			body, err := db.sealValue(o.body)
+			if err != nil {
+				return err
+			}
+			// `updated_at` røres ikke. Det betyder "hvornår skrev dette program noten
+			// sidst", og at lukke en konvolut om den er ikke at skrive den — en
+			// bagudfyldning, der stemplede tolv hundrede noter med i aften, ville
+			// kaste den rækkefølge væk, importen brugte en dag på at hente hjem.
+			if _, err := tx.ExecContext(ctx,
+				`UPDATE notes SET title = ?, body = ? WHERE id = ?`, title, body, o.id); err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+	if err != nil {
+		return 0, err
+	}
+	return len(pending), nil
+}
+
 // dsn is the connection string.
 //
 // SQLite is a single file, but it is being driven by an HTTP server with concurrent

internal/store/tasks.go

@@ -32,6 +32,13 @@ type Task struct {
 	// CreatedBy is empty when the author's account has been deleted: `created_by`
 	// is ON DELETE SET NULL so the task survives the person who wrote it.
 	CreatedBy string
+	// SourceKey names the thing out there this task was made from, namespaced:
+	// `gmail:thread:18f2c…`. Empty for a task somebody typed.
+	//
+	// It exists so that the second reader of a mailbox — another assistant, a
+	// rerun, a person — can ask "has this already become a task?" and get an
+	// answer. CreateTask returns ErrDuplicate rather than making a second one.
+	SourceKey string
 	SortOrder float64
 	// SubtaskCount and SubtaskDone are what a row can say without being opened:
 	// that there is something underneath it, and how much of it is left. Counted
@@ -166,15 +173,42 @@ func (db *DB) ListTasks(ctx context.Context, userID string, f TaskFilter) ([]Tas
 		// labels are short, and their names are typed by the person searching for
 		// them, so there is no spelling to be generous about. The diacritic
 		// folding that matters for task text does not earn a second index here.
+		//
+		// The third arm is a word inside a word. An index is built of tokens, and
+		// `SpeedAdmin` is one of them — so "speed admin" asks for two words that are
+		// nowhere. A prefix query gets half of it (`speed*` matches, `admin*` cannot)
+		// and the two are joined with AND, so the half that works is thrown away.
+		//
+		// Notes got the same arm, and for the same reason. Having it in one of the
+		// two would be worse than having it in neither: "it finds it in my notes but
+		// not in my tasks" is a bug report waiting, and the answer to it would be
+		// this line.
+		//
+		// It scans, and it only ever runs when somebody typed something in the box —
+		// Today and Kommende do not set `Search`. Every term has to appear, so the
+		// arms are ANDed with each other while the whole thing is ORed with the two
+		// above.
+		inside := make([]string, 0, maxSearchTerms)
+		insideArgs := make([]any, 0, maxSearchTerms)
+		for _, term := range SearchTerms(f.Search) {
+			inside = append(inside, "t.fold LIKE ?")
+			insideArgs = append(insideArgs, "%"+FoldDanish(term)+"%")
+		}
+		text := ""
+		if len(inside) > 0 {
+			text = " OR (" + strings.Join(inside, " AND ") + ")"
+		}
+
 		where = append(where, `(
 			t.rowid IN (SELECT rowid FROM tasks_fts WHERE tasks_fts MATCH ?)
 			OR t.id IN (
 				SELECT tl.task_id FROM task_labels tl
 				JOIN labels l ON l.id = tl.label_id
 				WHERE lower(l.name) LIKE ?
-			)
+			)`+text+`
 		)`)
 		args = append(args, expr, "%"+strings.ToLower(strings.TrimSpace(f.Search))+"%")
+		args = append(args, insideArgs...)
 	}
 	if f.FilterSQL != "" {
 		where = append(where, "("+f.FilterSQL+")")
@@ -425,21 +459,48 @@ func (db *DB) CreateTask(ctx context.Context, t *Task, labelNames []string) erro
 		_, err := tx.ExecContext(ctx, `
 			INSERT INTO tasks (id, project_id, section_id, parent_id, content, description,
 			                   priority, due_date, due_datetime, due_timezone, duration_min,
-			                   recurrence_rule, assignee_id, created_by, sort_order,
+			                   recurrence_rule, assignee_id, created_by, source_key, sort_order,
 			                   created_at, updated_at)
-			VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
+			VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
 			t.ID, t.ProjectID, nullString(t.SectionID), nullString(t.ParentID),
 			t.Content, t.Description, t.Priority, nullString(t.DueDate),
 			nullTime(t.DueDatetime), nullString(t.DueTimezone), nullInt(t.DurationMin),
 			nullString(t.RecurrenceRule), nullString(t.AssigneeID), nullString(t.CreatedBy),
-			t.SortOrder, now.Unix(), now.Unix())
+			t.SourceKey, t.SortOrder, now.Unix(), now.Unix())
 		if err != nil {
+			// The one broken constraint that is not a bug: this source has already
+			// become a task. The caller skips it rather than making a duplicate,
+			// which is the entire reason the index exists.
+			if isUniqueViolation(err) {
+				return ErrDuplicate
+			}
 			return err
 		}
 		return setTaskLabels(ctx, tx, t.ID, t.CreatedBy, labelNames)
 	})
 }
 
+// TaskIDBySource answers "has this mail already become a task?" — the question
+// nothing could answer before, and the one that stops two assistants reading the
+// same inbox from making two of everything. Empty id and no error means no.
+//
+// Deleted tasks count. A task that was made from a mail and then thrown away is
+// an answer — remaking it on the next sweep would be the same duplicate wearing
+// a different hat.
+func (db *DB) TaskIDBySource(ctx context.Context, userID, sourceKey string) (string, error) {
+	if sourceKey == "" {
+		return "", nil
+	}
+	var id string
+	err := db.QueryRowContext(ctx,
+		`SELECT id FROM tasks WHERE created_by = ? AND source_key = ?`,
+		userID, sourceKey).Scan(&id)
+	if errors.Is(err, sql.ErrNoRows) {
+		return "", nil
+	}
+	return id, err
+}
+
 func (db *DB) nextTaskOrder(ctx context.Context, projectID, sectionID string) (float64, error) {
 	var max sql.NullFloat64
 	var err error

internal/store/users.go

@@ -16,6 +16,11 @@ var (
 	ErrNotFound      = errors.New("store: not found")
 	ErrEmailInUse    = errors.New("store: that email address already has an account")
 	ErrInviteInvalid = errors.New("store: invite is not valid")
+	// ErrDuplicate er en unik nøgle, der blev brudt, oversat til noget en handler
+	// kan spørge om. Drivereren udstiller ikke sin egen fejltype brugbart, og en
+	// handler, der matcher på tekst, er en handler, der går i stykker den dag
+	// driveren omformulerer sig.
+	ErrDuplicate = errors.New("store: already exists")
 )
 
 type User struct {
@@ -200,9 +205,50 @@ func (db *DB) SetSidebarCollapsed(ctx context.Context, userID string, sections [
 // Person is the public half of a user: what somebody else is allowed to see when
 // their name has to appear next to a task. No address, no hash, no timezone.
 type Person struct {
-	ID          string
-	Name        string
-	AvatarColor string
+	ID          string `json:"id"`
+	Name        string `json:"name"`
+	AvatarColor string `json:"avatar_color"`
+}
+
+// PersonByID resolves one user to a name and colour, or ErrNotFound. Used to check
+// that somebody a note is about to be shared with actually exists, without loading
+// the whole account.
+func (db *DB) PersonByID(ctx context.Context, id string) (Person, error) {
+	var p Person
+	err := db.QueryRowContext(ctx,
+		`SELECT id, name, avatar_color FROM users WHERE id = ?`, id).Scan(&p.ID, &p.Name, &p.AvatarColor)
+	if errors.Is(err, sql.ErrNoRows) {
+		return Person{}, ErrNotFound
+	}
+	return p, err
+}
+
+// UsersForSharing is everyone on the instance except the caller — the people a note
+// can be handed to.
+//
+// Deliberately wider than ListPeople, which is the project collaborators. The whole
+// point of sharing a note directly is to do it without first standing up a shared
+// project, so the picker cannot be limited to people you already share a project
+// with. An instance's accounts are a closed, invited set to begin with — there is
+// no open signup — so listing them to each other is not disclosure, it is the
+// address book the feature needs.
+func (db *DB) UsersForSharing(ctx context.Context, meID string) ([]Person, error) {
+	rows, err := db.QueryContext(ctx,
+		`SELECT id, name, avatar_color FROM users WHERE id <> ? ORDER BY lower(name)`, meID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	people := []Person{}
+	for rows.Next() {
+		var p Person
+		if err := rows.Scan(&p.ID, &p.Name, &p.AvatarColor); err != nil {
+			return nil, err
+		}
+		people = append(people, p)
+	}
+	return people, rows.Err()
 }
 
 // PeopleByIDs looks up several users at once.
@@ -461,6 +507,26 @@ func (db *DB) SetTOTPSecret(ctx context.Context, userID, secret string, enabled
 	return err
 }
 
+// ConsumeTOTPStep records a just-accepted TOTP step and reports whether it was
+// fresh. It answers false when the step has already been spent — the same code, or
+// an earlier one, being presented a second time.
+//
+// The guard is in the statement, not in a read-then-write: two logins racing with
+// the same stolen code must not both find the old value and both proceed. The row
+// moves forward only when the new step is strictly greater, so exactly one of them
+// updates a row and the other sees nothing change.
+func (db *DB) ConsumeTOTPStep(ctx context.Context, userID string, step int64) (bool, error) {
+	res, err := db.ExecContext(ctx,
+		`UPDATE users SET totp_last_step = ? WHERE id = ?
+		   AND (totp_last_step IS NULL OR totp_last_step < ?)`,
+		step, userID, step)
+	if err != nil {
+		return false, err
+	}
+	n, _ := res.RowsAffected()
+	return n == 1, nil
+}
+
 // InboxID returns the user's Inbox project.
 func (db *DB) InboxID(ctx context.Context, userID string) (string, error) {
 	var id string

mkdocs.yml

@@ -50,10 +50,12 @@ nav:
   - Using it:
       - Signing in: signing-in.md
       - Quick add: quick-add.md
+      - Notes: notes.md
       - Filters: filters.md
       - Importing from Todoist: import.md
   - Connecting things:
-      - Calendar and CalDAV: caldav.md
+      - Calendar: calendar.md
+      - Feeds and CalDAV: caldav.md
       - Mail to task: mail.md
       - Mailboxes: mailboxes.md
       - Claude (MCP): mcp.md

rune/verdande.yaml

@@ -15,12 +15,37 @@ gameskill:
   # this: a manifest with new fields and an unchanged version is a manifest the
   # panel has no reason to re-read, so the fields never appear and the failure is
   # silent — the server's settings page simply does not offer them.
-  version: 4
+  # Bumpet til 6: v5 flyttede imaget til vores egen Gitea, og det virkede ikke.
+  # En rune opdaterer ikke sig selv — panelet skriver rune-rækken fra en
+  # UI-handling, så ændringen her kræver **Runes → verdande → Update**, og
+  # katalog-listen caches ti minutter, så to forsøg lige efter hinanden kan begge
+  # give den gamle version.
+  version: 6
   icon: "app"
 
   # The image is distroless — no shell — so keep_entrypoint runs the binary the
   # image already declares as its ENTRYPOINT, and startup.exec passes it argv
   # directly rather than through /bin/sh, which does not exist in there.
+  # GHCR, ikke vores egen Gitea. v5 prøvede det sidste og tog instansen ned.
+  #
+  # Panelets `PullImage` sætter aldrig `RegistryAuth`, så registret SKAL kunne
+  # læses uden legitimation. GHCR kan: dens token-endepunkt svarer 200 og udsteder
+  # en pull-token til hvem som helst. Gitea på gitea.nolimit.dk kan ikke —
+  # `/v2/token?scope=repository:kw/verdande:pull` svarer 401, også efter at repoet
+  # blev gjort offentligt. Instansen kræver login på alt, registret inklusive, og
+  # det er en indstilling for hele instansen frem for for denne pakke.
+  #
+  # Sådan ser det ud, når det går galt, for det tog en time at finde: panelet
+  # river containeren ned for at anvende runen, pullet fejler, `pullImageRetry`
+  # kasserer fejlen, og `ContainerCreate` slår derefter op LOKALT og siger
+  # `No such image`. Serveren står som "running" uden container_id, og udadtil er
+  # det en 502. Fejlen nævner aldrig, at det var et login, der manglede.
+  #
+  # Sådan afgør man det, uden at blive narret: spørg registrets token-endepunkt
+  # med `curl` og se efter en 200 med et token i. Test det ALDRIG med
+  # `docker --config <tom-mappe> pull` — en tom config stopper ikke maskinens
+  # credential-helper, så pullet bliver autentificeret uden at se sådan ud, og
+  # svaret er præcis det modsatte af sandheden.
   docker:
     image: "ghcr.io/kristianwind/verdande:latest"
     data_path: /data

site/index.html

@@ -926,6 +926,26 @@
 				</figure>
 
 				<div class="shots">
+					<figure class="shot">
+						<img
+							src="screenshots/calendar-light.webp"
+							alt="A week in the calendar: timed tasks drawn to their length, a fifteen-minute stand-up short and a ninety-minute planning block tall, each on the day and at the time it is due."
+							width="1400"
+							height="900"
+							loading="lazy"
+						/>
+						<figcaption>The calendar draws a task to its length — drag its foot to change it.</figcaption>
+					</figure>
+					<figure class="shot">
+						<img
+							src="screenshots/notes-shared-light.webp"
+							alt="Notes with a Shared with me group at the top of the list, holding a note somebody else shared, marked with whose it is, open on the right."
+							width="1400"
+							height="900"
+							loading="lazy"
+						/>
+						<figcaption>A note shared with you, gathered under Shared with me.</figcaption>
+					</figure>
 					<figure class="shot">
 						<img
 							src="screenshots/board.webp"
@@ -1063,6 +1083,23 @@
 							written about it. Archive what is done with it; the bin is for mistakes.
 						</p>
 					</div>
+					<div class="cell">
+						<h3>Share a note, or a page</h3>
+						<p>
+							Hand a single note to a person — to read or to edit — without standing up
+							a project for it. Notes other people share with you gather under
+							<em>Shared with me</em>, each marked with whose it is. File it in a project
+							instead and everyone who can read the project reads the note.
+						</p>
+					</div>
+					<div class="cell">
+						<h3>How long it takes</h3>
+						<p>
+							A task can carry a length, and the calendar draws it to scale. Drag the
+							foot of a task to make it longer or shorter, or drag its body to another
+							day or time — the length comes along.
+						</p>
+					</div>
 					<div class="cell">
 						<h3>Waiting on others</h3>
 						<p>

web/e2e/smoke.spec.js

@@ -558,15 +558,35 @@ test('en opgave kan trækkes til en anden dag og videre til et projekt', async (
 	// browser is pinned to Europe/Copenhagen and this process is not, and for two
 	// hours of every day they disagree about what today is.
 	await page.goto('/upcoming');
+
+	// Taller than the default window, and it is not cosmetic: the month grid is
+	// six rows, and in 720 px the last one is cut off by the fold. A synthetic
+	// drag drops at the target's centre without the auto-scroll a real pointer
+	// gets from the browser — so a target below the fold is never hit.
+	//
+	// That made this test depend on the date. The task sits on tomorrow, and when
+	// tomorrow is a Sunday, the day after is the first cell of the next row, down
+	// in the cut-off part. It passed for months and failed the morning tomorrow
+	// happened to be a Sunday, on a commit that had touched nothing near a
+	// calendar.
+	await page.setViewportSize({ width: 1280, height: 1000 });
 	await page.getByRole('button', { name: 'Måned', exact: true }).click();
 
 	const chip = page.locator('.chip').filter({ hasText: 'hent pakken' });
 	await expect(chip).toBeVisible();
 
 	const from = await page.locator('.day').filter({ has: chip }).getAttribute('data-date');
-	const to = new Date(new Date(`${from}T12:00:00Z`).getTime() + 86400000)
-		.toISOString()
-		.slice(0, 10);
+
+	// The neighbouring cell is taken from the grid, not worked out from the date.
+	// The day after tomorrow is not always in the month on screen — at the end of
+	// a short month it falls outside it entirely — and the cell next door always
+	// is. Falls back to the cell before, for the one day a month when there is no
+	// cell after.
+	const dates = await page
+		.locator('.day[data-date]')
+		.evaluateAll((cells) => cells.map((cell) => cell.dataset.date));
+	const at = dates.indexOf(from);
+	const to = dates[at + 1] ?? dates[at - 1];
 
 	await chip.dragTo(page.locator(`[data-date="${to}"]`));
 	await expect(page.locator(`[data-date="${to}"]`).getByText('hent pakken')).toBeVisible();
@@ -983,11 +1003,11 @@ test('en opgave kan trækkes hen over et månedsskifte i uge-visningen', async (
 	// slipper der, hvor man kan se, man slipper.
 	await chip.dragTo(page.locator(`[data-date="${to}"]`), { targetPosition: { x: 30, y: 20 } });
 
-	// Sluppet på timesøjlen, landet i heldagsbåndet — og det er det rigtige sted.
-	// Et træk hen på en dag flytter datoen og sætter ikke et klokkeslæt, så opgaven
-	// har ingen tid at stå ved. `data-allday` er den anden halvdel af dagen: siden
-	// ugen blev et døgn, er en dag to kasser, og en prøve skal sige hvilken.
-	await expect(page.locator(`[data-allday="${to}"]`).getByText('skifte dæk')).toBeVisible();
+	// Landet i timesøjlen med et klokkeslæt: hvor på døgnet man slap, *er* tiden.
+	// Sluppet tyve pixels nede i en søjle, der begynder klokken otte, bliver det
+	// tidligt på dagen — hvad det præcist runder til, er ikke det, der prøves her.
+	await expect(page.locator(`[data-date="${to}"] .tevent`).getByText('skifte dæk')).toBeVisible();
+	await expect(page.locator(`[data-date="${from}"]`).getByText('skifte dæk')).toBeHidden();
 	await expect(page.locator(`[data-allday="${from}"]`).getByText('skifte dæk')).toBeHidden();
 
 	expect(trouble).toEqual([]);
@@ -1178,13 +1198,22 @@ test('kalenderen viser Googles begivenheder over egne opgaver, og kun opgaven ka
 	// få prøven til at bestå: det er også sådan et menneske gør det, fordi man
 	// slipper der, hvor man kan se, man slipper.
 	await task.dragTo(page.locator(`[data-date="${next}"]`), { targetPosition: { x: 30, y: 20 } });
-	// Landet i næste dags bånd: et træk hen på en dag flytter datoen og sætter ikke
-	// et klokkeslæt, så opgaven har ingen tid at stå ved.
-	await expect(page.locator(`[data-allday="${next}"]`).getByText('vande blomster')).toBeVisible();
+	// Landet i næste dags timesøjle, med det klokkeslæt der blev sluppet på.
+	await expect(page.locator(`[data-date="${next}"] .tevent`).getByText('vande blomster')).toBeVisible();
 	await expect(band.getByText('vande blomster')).toBeHidden();
 	// The events stayed where they were; a rescheduled task moves nothing else.
-	await expect(cell.locator('.tevent')).toHaveCount(1);
-	await expect(band.locator('.event')).toHaveCount(1);
+	//
+	// Named, not counted. A raw `.tevent` count here assumes this day holds nothing
+	// but this test's own events — and it does not: the suite shares one database,
+	// so an earlier test that drags a task across a month boundary can leave a timed
+	// task on this very day, and a timed task is a `.tevent` too. Counting them all
+	// made this pass alone and fail in the full run, on whatever date the arithmetic
+	// happened to land the two tests on the same cell. Asserting the meeting stayed
+	// and the task left is the thing the test actually means, and it is true however
+	// full somebody else left the day.
+	await expect(cell.locator('.tevent').filter({ hasText: 'Bestyrelsesmøde' })).toHaveCount(1);
+	await expect(cell.locator('.tevent').filter({ hasText: 'vande blomster' })).toHaveCount(0);
+	await expect(band.locator('.event').filter({ hasText: 'Feriedag' })).toHaveCount(1);
 
 	expect(trouble).toEqual([]);
 });
@@ -1196,6 +1225,69 @@ test('kalenderen viser Googles begivenheder over egne opgaver, og kun opgaven ka
  * thing this view was before anything was laid over it — and a Google account that
  * is not there must not take it down with it.
  */
+test('en opgaves længde kan trækkes længere på kalenderen', async ({ page }) => {
+	const trouble = watchForTrouble(page);
+	await page.goto('/');
+
+	// A timed task today at ten, half an hour long. Today, so the week opens on it
+	// without paging, and ten is inside the hours the grid draws by default.
+	const today = await page.evaluate(() => {
+		const d = new Date();
+		return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(d.getDate()).padStart(2, '0')}`;
+	});
+	const id = await page.evaluate(async (day) => {
+		const r = await fetch('/api/v1/tasks', {
+			method: 'POST',
+			credentials: 'include',
+			headers: { 'Content-Type': 'application/json', 'Sec-Fetch-Site': 'same-origin' },
+			body: JSON.stringify({
+				content: 'Møde med Anders',
+				due_date: day,
+				due_time: '10:00',
+				duration_min: 30
+			})
+		});
+		return (await r.json()).id;
+	}, today);
+
+	await page.goto('/kalender');
+	await page.getByRole('button', { name: 'Uge', exact: true }).click();
+
+	const chip = page
+		.locator(`[data-date="${today}"] .tevent.task`)
+		.filter({ hasText: 'Møde med Anders' });
+	await expect(chip).toBeVisible();
+	const before = await chip.evaluate((el) => el.getBoundingClientRect().height);
+
+	// Drag the foot of the task down a good stretch. It should grow, both on screen
+	// and in what the server stores — a resize is a change of length, not of time.
+	const box = await chip.boundingBox();
+	await page.mouse.move(box.x + box.width / 2, box.y + box.height - 2);
+	await page.mouse.down();
+	await page.mouse.move(box.x + box.width / 2, box.y + box.height + 130, { steps: 6 });
+	await page.mouse.up();
+
+	await expect
+		.poll(async () =>
+			page.evaluate(async (tid) => {
+				const r = await fetch('/api/v1/tasks/' + tid, {
+					credentials: 'include',
+					headers: { 'Sec-Fetch-Site': 'same-origin' }
+				});
+				return (await r.json()).duration_min;
+			}, id)
+		)
+		.toBeGreaterThan(30);
+
+	// And the chip is taller than it was, so the length is something you can see.
+	await expect.poll(async () => chip.evaluate((el) => el.getBoundingClientRect().height)).toBeGreaterThan(before);
+
+	// The time did not move: it is still a ten o'clock task.
+	await expect(chip.locator('.at')).toHaveText('10:00');
+
+	expect(trouble).toEqual([]);
+});
+
 test('kalenderen virker uden en forbundet Google-konto', async ({ page }) => {
 	const trouble = watchForTrouble(page);
 	await page.goto('/kalender');
@@ -2411,8 +2503,9 @@ test('en note kan deles med et projekts folk, og tages tilbage igen', async ({ p
 	await page.keyboard.type('Fælles aftale om leveringen');
 	await page.getByRole('textbox', { name: 'Notens tekst' }).blur();
 
-	// Shared by being filed in a project. Not an access list of its own.
-	await page.getByLabel('Del i').selectOption({ label: 'Delenoter' });
+	// Filing it in a project — the controls live in the Del popover in the footer.
+	await page.locator('.sharewrap > button').click();
+	await page.getByLabel('Læg i projekt').selectOption({ label: 'Delenoter' });
 	await expect(page.getByText('delt med projektets folk')).toBeVisible();
 
 	// And it is really there, not merely labelled: the project's own page shows it.
@@ -2422,7 +2515,8 @@ test('en note kan deles med et projekts folk, og tages tilbage igen', async ({ p
 	// Taken back out, it is the author's alone again.
 	await sidebar.getByRole('link', { name: 'Noter', exact: true }).click();
 	await page.getByRole('button', { name: /Fælles aftale/ }).click();
-	await page.getByLabel('Del i').selectOption({ label: 'Kun mig' });
+	await page.locator('.sharewrap > button').click();
+	await page.getByLabel('Læg i projekt').selectOption({ label: 'Intet projekt' });
 	await expect(page.getByText('din igen')).toBeVisible();
 
 	await sidebar.getByRole('link', { name: 'Delenoter' }).click();
@@ -2431,6 +2525,68 @@ test('en note kan deles med et projekts folk, og tages tilbage igen', async ({ p
 	expect(trouble).toEqual([]);
 });
 
+test('en note kan deles med en person direkte, og dukker op hos dem', async ({ browser, page }) => {
+	const trouble = watchForTrouble(page);
+
+	// Somebody to share with: a second account on the instance, made the ordinary
+	// way. The candidate list is drawn when the note opens, so they must exist
+	// before it does.
+	await page.goto('/indstillinger/brugere');
+	await page.getByLabel('E-mailadresse').fill('sofie@example.dk');
+	await page.getByRole('button', { name: 'Send invitation' }).click();
+	const link = await page.locator('.link-out').textContent();
+
+	const sofieCtx = await browser.newContext({ storageState: { cookies: [], origins: [] } });
+	const sofie = await sofieCtx.newPage();
+	await sofie.goto(link);
+	await sofie.getByLabel('Navn', { exact: true }).fill('Sofie');
+	await sofie.getByLabel(/Adgangskode/).fill('et langt kodeord til test');
+	await sofie.getByRole('button', { name: 'Opret konto' }).click();
+	await expect(sofie.getByRole('navigation', { name: 'Hovedmenu' })).toBeVisible();
+
+	// The owner writes a note and hands it to Sofie, as a reader.
+	const sidebar = page.getByRole('navigation', { name: 'Hovedmenu' });
+	await sidebar.getByRole('link', { name: 'Noter', exact: true }).click();
+	await page.getByRole('button', { name: 'Ny note' }).click();
+	await page.getByRole('textbox', { name: 'Notens tekst' }).click();
+	await page.keyboard.type('Ferieplan for hele holdet');
+	await page.getByRole('textbox', { name: 'Notens tekst' }).blur();
+
+	// Sharing lives in a popover behind the Del button in the footer.
+	await page.locator('.sharewrap > button').click();
+	const share = page.locator('.sharepanel');
+	await expect(share).toBeVisible();
+	await share.locator('.addshare select').first().selectOption({ label: 'Sofie' });
+	await share.getByRole('button', { name: 'Tilføj' }).click();
+
+	// She is on the note now, with the role she was given.
+	const row = share.locator('.sharelist li').filter({ hasText: 'Sofie' });
+	await expect(row).toBeVisible();
+	await expect(row.locator('select')).toHaveValue('viewer');
+
+	// And it reaches her: her own notes list grows a Delt med mig group with it in.
+	//
+	// Navigated on the origin the invite signed her in on. VERDANDE_BASE_URL is
+	// localhost while the suite drives 127.0.0.1, and a session cookie set on one
+	// host is not sent to the other — a bare "/noter" would land her logged out.
+	const noterURL = new URL('/noter', link).href;
+	await sofie.goto(noterURL);
+	await expect(sofie.getByRole('button', { name: /Delt med mig/ })).toBeVisible();
+	await expect(sofie.getByRole('button', { name: /Ferieplan for hele holdet/ })).toBeVisible();
+	// A viewer's note carries no star or archive control — it is not hers to put away.
+	const sofieRow = sofie.locator('.notes li').filter({ hasText: 'Ferieplan for hele holdet' });
+	await expect(sofieRow.locator('.star')).toHaveCount(0);
+
+	// Taken back, it leaves her list.
+	await row.getByRole('button', { name: 'Fjern adgang' }).click();
+	await expect(row).toBeHidden();
+	await sofie.goto(noterURL);
+	await expect(sofie.getByRole('button', { name: /Ferieplan for hele holdet/ })).toBeHidden();
+
+	await sofieCtx.close();
+	expect(trouble).toEqual([]);
+});
+
 test('udseendet kan skiftes uafhængigt af temaet, og overlever en genindlæsning', async ({
 	page
 }) => {
@@ -2468,6 +2624,47 @@ test('udseendet kan skiftes uafhængigt af temaet, og overlever en genindlæsnin
 	expect(trouble).toEqual([]);
 });
 
+test('[[ foreslår en note, og linket lander i noten', async ({ page }) => {
+	const trouble = watchForTrouble(page);
+	await page.goto('/noter');
+
+	// One note to point at, then another to write the link in.
+	await page.getByRole('button', { name: 'Ny note' }).click();
+	const ed = page.getByRole('textbox', { name: 'Notens tekst' });
+	await ed.click();
+	await page.keyboard.type('Rejseplan til Berlin');
+	await ed.blur();
+	await page.waitForTimeout(600);
+
+	await page.getByRole('button', { name: 'Ny note' }).click();
+	await ed.click();
+	await page.keyboard.type('Mine planer');
+	await page.keyboard.press('Enter');
+	await page.keyboard.type('Se ');
+	await page.keyboard.type('[[Rejse');
+
+	// The picker offers the note by title, and choosing it turns the text into a
+	// real inline link — the title, not the brackets.
+	const option = page.locator('.suggestions button', { hasText: 'Rejseplan til Berlin' });
+	await expect(option).toBeVisible();
+	await option.click();
+	const inline = ed.locator('a.notelink', { hasText: 'Rejseplan til Berlin' });
+	await expect(inline).toBeVisible();
+
+	// It survives the round-trip through Markdown and a reload.
+	await ed.blur();
+	await page.waitForTimeout(900);
+	await page.reload();
+	await page.getByRole('button', { name: /Mine planer/ }).click();
+	await expect(ed.locator('a.notelink', { hasText: 'Rejseplan til Berlin' })).toBeVisible();
+
+	// And it is a link you can follow: clicking it opens the note it names.
+	await ed.locator('a.notelink', { hasText: 'Rejseplan til Berlin' }).click();
+	await expect(ed.locator('h1')).toHaveText('Rejseplan til Berlin');
+
+	expect(trouble).toEqual([]);
+});
+
 test('en ny note begynder som titel, og linjen efter er brødtekst', async ({ page }) => {
 	const trouble = watchForTrouble(page);
 	await page.goto('/noter');
@@ -2891,10 +3088,11 @@ test('en note kan oprettes inde fra et projekt og hører til det med det samme',
 	await page.keyboard.type('Tagsten og lægter');
 	await page.waitForTimeout(1200);
 
-	// Den hører til projektet med det samme: "Del i" står på projektet, uden at
-	// nogen har valgt det bagefter.
-	await expect(page.getByLabel('Del i')).toHaveValue(/.+/);
-	const shared = await page.getByLabel('Del i').evaluate((el) => el.selectedOptions[0].textContent);
+	// Den hører til projektet med det samme: "Læg i projekt" står på projektet,
+	// uden at nogen har valgt det bagefter. Kontrollen ligger i Del-popoveren.
+	await page.locator('.sharewrap > button').click();
+	await expect(page.getByLabel('Læg i projekt')).toHaveValue(/.+/);
+	const shared = await page.getByLabel('Læg i projekt').evaluate((el) => el.selectedOptions[0].textContent);
 	expect(shared).toContain('Tagprojekt');
 
 	// Og den står på projektets egen side.
@@ -2960,6 +3158,96 @@ test('en note kan trækkes hen på et projekt i sidebjælken', async ({ page })
 	expect(trouble).toEqual([]);
 });
 
+test('en note kan arkiveres fra sin egen fod, og hentes frem igen', async ({ page }) => {
+	const trouble = watchForTrouble(page);
+	await page.goto('/noter');
+
+	await page.getByRole('button', { name: 'Ny note' }).click();
+	const ed = page.getByRole('textbox', { name: 'Notens tekst' });
+	await ed.click();
+	await page.keyboard.type('Kvartalsplan');
+	await ed.blur();
+	await page.waitForTimeout(700);
+
+	// The Arkivér button in the note's footer puts it away: it leaves the list.
+	await page.locator('footer .actions .button', { hasText: 'Arkivér' }).click();
+	await expect(page.locator('.notes button.row', { hasText: 'Kvartalsplan' })).toHaveCount(0);
+
+	// It is in the archive, where the same button now offers to bring it back.
+	await page.getByRole('button', { name: 'Vis arkivet' }).click();
+	await page.locator('.notes button.row', { hasText: 'Kvartalsplan' }).click();
+	await page.locator('footer .actions .button', { hasText: 'Tag frem igen' }).click();
+	await expect(page.locator('.notes button.row', { hasText: 'Kvartalsplan' })).toHaveCount(0);
+
+	// And back in the ordinary list.
+	await page.getByRole('button', { name: 'Vis arkivet' }).click();
+	await expect(page.locator('.notes button.row', { hasText: 'Kvartalsplan' })).toBeVisible();
+
+	expect(trouble).toEqual([]);
+});
+
+test('en monospace-linje kan forlades — på retur og gennem menuen', async ({ page }) => {
+	const trouble = watchForTrouble(page);
+	await page.goto('/noter');
+
+	await page.getByRole('button', { name: 'Ny note' }).click();
+	const ed = page.getByRole('textbox', { name: 'Notens tekst' });
+	await ed.click();
+	await page.keyboard.type('Titel');
+	await page.keyboard.press('Enter');
+
+	// En monospace-linje, og så retur: linjen efter skal være brødtekst, ikke mere
+	// monospace. Før rettelsen holdt en <pre> på markøren, og alt derefter blev ved
+	// med at være kode.
+	await page.getByRole('button', { name: 'Formatér' }).click();
+	await page.getByRole('menuitem', { name: 'Monotype' }).click();
+	await page.keyboard.type('kode linje');
+	await page.keyboard.press('Enter');
+	await page.keyboard.type('almindelig tekst');
+
+	// Koden står i sin blok; teksten efter står uden for den.
+	await expect(ed.locator('pre')).toHaveText('kode linje');
+	await expect(ed.locator('p').filter({ hasText: 'almindelig tekst' })).toBeVisible();
+	await expect(ed.locator('pre').filter({ hasText: 'almindelig tekst' })).toHaveCount(0);
+
+	// Shift+retur bliver derimod i blokken, så flerlinjet kode stadig kan skrives.
+	await page.getByRole('button', { name: 'Formatér' }).click();
+	await page.getByRole('menuitem', { name: 'Monotype' }).click();
+	await page.keyboard.type('linje et');
+	await page.keyboard.press('Shift+Enter');
+	await page.keyboard.type('linje to');
+	await expect(ed.locator('pre').filter({ hasText: 'linje et' })).toContainText('linje to');
+
+	// Og menuen kan føre en monospace-linje tilbage til brødtekst — dét, der før
+	// lagde et <p> inde i <pre> og ikke kom nogen vegne.
+	await page.getByRole('button', { name: 'Formatér' }).click();
+	await page.getByRole('menuitem', { name: 'Brødtekst' }).click();
+	// Den blok er nu brødtekst, ikke kode: den står som <p>, ikke i en <pre>.
+	await expect(ed.locator('p').filter({ hasText: 'linje et' })).toBeVisible();
+	await expect(ed.locator('pre').filter({ hasText: 'linje et' })).toHaveCount(0);
+
+	// Det overlever turen gennem Markdown. En ren note for sig, så prøven ikke
+	// afhænger af alt det ovenfor: kode, retur, brødtekst — gem, hent igen.
+	await page.getByRole('button', { name: 'Ny note' }).click();
+	await ed.click();
+	await page.keyboard.type('Rundtur');
+	await page.keyboard.press('Enter');
+	await page.getByRole('button', { name: 'Formatér' }).click();
+	await page.getByRole('menuitem', { name: 'Monotype' }).click();
+	await page.keyboard.type('docker pull');
+	await page.keyboard.press('Enter');
+	await page.keyboard.type('og så videre i almindelig skrift');
+	await ed.blur();
+	await page.waitForTimeout(1200);
+	await page.reload();
+	await page.getByRole('button', { name: /Rundtur/ }).click();
+	await expect(ed.locator('pre')).toContainText('docker pull');
+	await expect(ed.locator('p').filter({ hasText: 'almindelig skrift' })).toBeVisible();
+	await expect(ed.locator('pre').filter({ hasText: 'almindelig skrift' })).toHaveCount(0);
+
+	expect(trouble).toEqual([]);
+});
+
 test('kodeblokken har en kopiér-knap, og knappen havner ikke i filen', async ({ page }) => {
 	const trouble = watchForTrouble(page);
 	await page.context().grantPermissions(['clipboard-read', 'clipboard-write']);
@@ -3033,7 +3321,8 @@ test('flere noter kan markeres, arkiveres og hentes frem igen', async ({ page })
 	await rows.filter({ hasText: 'Bravo' }).click({ modifiers: ['Meta'] });
 	await expect(page.getByText('2 markeret')).toBeVisible();
 
-	await page.getByRole('button', { name: 'Arkivér', exact: true }).click();
+	// The selection bar's Arkivér, not the open note's own in the footer.
+	await page.locator('.picked-bar').getByRole('button', { name: 'Arkivér', exact: true }).click();
 	await page.waitForTimeout(900);
 
 	// Væk fra listen, og ikke i papirkurven: arkivering er ikke sletning.
@@ -3210,3 +3499,293 @@ test('ugen viser et døgn, og dagene er lige brede', async ({ page }) => {
 
 	expect(trouble).toEqual([]);
 });
+
+/**
+ * Tid på en opgave, sat i ruden og justeret i kalenderen.
+ *
+ * Tre påstande, og den midterste er den, der var gået galt uden at nogen sagde
+ * det: serveren læser `due_date` og `due_time` sammen, så en dato sendt uden en
+ * tid *rydder* tiden. Et gem af datoen alene tog altså klokkeslættet med sig, og
+ * det samme gjorde et træk i kalenderen.
+ */
+test('en opgave kan få et klokkeslæt, og beholder det når den flyttes', async ({ page }) => {
+	const trouble = watchForTrouble(page);
+	await page.goto('/');
+
+	const box = page.getByLabel('Ny opgave');
+	// I dag, så den står på den visning, den skrives i — og i den uge, gitteret
+	// åbner på længere nede.
+	await box.fill('ringe til tandlægen i dag');
+	await box.press('Enter');
+	await expect(page.getByText('ringe til tandlægen')).toBeVisible();
+
+	// Klokkeslættet sættes i ruden. Feltet er tomt til at begynde med: en opgave
+	// uden tid er det almindelige, og 00:00 ville påstå noget om midnat.
+	await page.getByText('ringe til tandlægen').click();
+	const time = page.getByLabel('Klokkeslæt');
+	await expect(time).toHaveValue('');
+	// Tidligt på dagen med vilje: gitteret begynder klokken otte, så opgaven står
+	// lige under båndet og de to kasser er i billedet på én gang. Klokken fjorten
+	// ligger under skærmkanten, og et træk, der først skal rulle, er et træk,
+	// browseren taber.
+	await time.fill('08:30');
+	await time.blur();
+	await page.waitForTimeout(400);
+
+	// Gemt hos serveren, ikke kun i feltet: genindlæst og åbnet igen.
+	await page.reload();
+	await page.getByText('ringe til tandlægen').click();
+	await expect(page.getByLabel('Klokkeslæt'), 'klokkeslættet blev ikke gemt').toHaveValue('08:30');
+
+	// Og datoen kan rettes bagefter uden at tage timen med sig.
+	const date = page.locator('#due');
+	const day = await date.inputValue();
+	await date.fill(day);
+	await date.blur();
+	await page.waitForTimeout(400);
+	await page.reload();
+	await page.getByText('ringe til tandlægen').click();
+	await expect(
+		page.getByLabel('Klokkeslæt'),
+		'et gem af datoen ryddede klokkeslættet'
+	).toHaveValue('08:30');
+
+	await page.keyboard.press('Escape');
+
+	// I ugegitteret står den på sit klokkeslæt frem for i heldagsbåndet.
+	await page.goto('/upcoming');
+	await page.getByRole('button', { name: 'Uge', exact: true }).click();
+	const placed = page.locator('.tevent.task').filter({ hasText: 'ringe til tandlægen' });
+	await expect(placed, 'opgaven står ikke på døgnet').toBeVisible();
+	await expect(placed).toContainText('08:30');
+
+	// Trukket op i båndet over sin egen dag: så har den en dag og ingen tid. Den
+	// tomme streng siger "ryd", hvor ingenting siger "behold" — og de to må ikke
+	// forveksles.
+	//
+	// Et bånd, der er tomt. Prøven handler om at krydse mellem de to kasser, og en
+	// dag, hvis bånd allerede er fyldt af andre prøvers opgaver, gør slippunktet
+	// til en anden opgave frem for til båndet — hvilket er en anden gest end den,
+	// der prøves her.
+	const band = page
+		.locator('.weekgrid > .allday')
+		.filter({ hasNot: page.locator('.chip, .event') })
+		.first();
+	const today = await band.getAttribute('data-allday');
+	// Trukket i skridt frem for i ét spring. `dragTo` flytter musen i to træk, og
+	// over fire hundrede pixels i et travlt gitter giver det browseren for få
+	// mellemstationer til at holde gesten i live. Et menneske bevæger hånden hele
+	// vejen, og det er også det, der skal prøves.
+	const fromBox = await placed.boundingBox();
+	const toBox = await band.boundingBox();
+	await page.mouse.move(fromBox.x + fromBox.width / 2, fromBox.y + 5);
+	await page.mouse.down();
+	await page.mouse.move(toBox.x + toBox.width / 2, toBox.y + toBox.height / 2, { steps: 25 });
+	await page.mouse.up();
+	await expect(
+		page.locator(`[data-allday="${today}"] .chip`).filter({ hasText: 'ringe til tandlægen' }),
+		'opgaven kom ikke op i båndet'
+	).toBeVisible();
+	await expect(
+		page.locator(`[data-date="${today}"] .tevent`).filter({ hasText: 'ringe til tandlægen' }),
+		'opgaven står stadig på et klokkeslæt'
+	).toBeHidden();
+
+	expect(trouble).toEqual([]);
+});
+
+/**
+ * Notelisten står i grupper.
+ *
+ * Den føltes tæt, og grunden var ikke afstanden mellem rækkerne: hver række sagde
+ * tre ting, og to af dem gentog sig selv nedad. Datoen stod på hver eneste række,
+ * også når tyve noter deler dag, og projektet fik en linje for sig selv.
+ *
+ * Datoen er flyttet op i en overskrift, favoritterne har fået deres egen gruppe —
+ * de lå allerede først, der stod bare ikke hvorfor — og arkivet grupperes på samme
+ * måde, for det er dér, de tolv hundrede importerede ligger.
+ */
+test('notelisten grupperer favoritter og datoer, også i arkivet', async ({ page }) => {
+	const trouble = watchForTrouble(page);
+	await page.goto('/noter');
+
+	for (const title of ['Gruppe én', 'Gruppe to']) {
+		await page.getByRole('button', { name: 'Ny note' }).click();
+		const ed = page.getByRole('textbox', { name: 'Notens tekst' });
+		await ed.click();
+		await page.keyboard.type(title);
+		await page.keyboard.press('Enter');
+		await page.keyboard.type('Brødtekst i ' + title);
+		await expect(ed.locator('h1')).toHaveText(title);
+		await page.waitForTimeout(800);
+	}
+	await page.reload();
+
+	// Skrevet i dag, så de står under dagens overskrift.
+	const today = page.getByRole('heading', { name: /^I dag/ });
+	await expect(today, 'der er ingen datogruppe').toBeVisible();
+
+	// En favorit får sin egen gruppe. Uden overskriften ligger den bare først, og
+	// der står ikke hvorfor.
+	await expect(page.getByRole('heading', { name: /Favoritter/i })).toBeHidden();
+	const row = page.locator('li').filter({ hasText: 'Gruppe én' }).first();
+	await row.hover();
+	await row.getByRole('button', { name: /favorit/i }).click();
+	const favourites = page.getByRole('heading', { name: /Favoritter/i });
+	await expect(favourites).toBeVisible();
+
+	// Og den ligger under den, ikke under dagen.
+	const inFavourites = page
+		.locator('h3.group', { hasText: /Favoritter/i })
+		.locator('+ ul li')
+		.filter({ hasText: 'Gruppe én' });
+	await expect(inFavourites).toBeVisible();
+
+	// Grupper kan foldes sammen. Ikke husket på tværs af besøg: en gruppe, der
+	// åbner foldet uden at nogen bad om det, er en liste, der ser tom ud.
+	await favourites.getByRole('button').click();
+	await expect(inFavourites).toBeHidden();
+	await favourites.getByRole('button').click();
+	await expect(inFavourites).toBeVisible();
+
+	// En søgning grupperes ikke: serveren har sorteret efter hvor godt hver note
+	// matchede, og at dele det op i måneder ville stille rækkefølgen om efter noget
+	// andet end det, der blev spurgt om.
+	await page.getByPlaceholder('Søg i noter').fill('Brødtekst');
+	await expect(page.locator('li').filter({ hasText: 'Gruppe to' }).first()).toBeVisible();
+	await expect(page.locator('h3.group')).toHaveCount(0);
+	await page.getByPlaceholder('Søg i noter').fill('');
+
+	// Rækkerne skal kunne *ses*, ikke bare findes.
+	//
+	// Da listen blev delt i grupper, blev hver gruppe sit eget `<ul>` — og dermed
+	// sit eget flex-element med `overflow-y: auto`. Flex-elementer skrumper som
+	// udgangspunkt, og et element, der skrumper og klipper, viser ingenting: alle
+	// overskrifter stod med deres tal, og der var ikke en eneste note under nogen af
+	// dem. Med tre grupper og en høj skærm var der plads nok til at det ikke skete,
+	// hvilket er hvorfor prøven herover ikke fangede det.
+	//
+	// Et lavt vindue fremtvinger presset. Tolv hundrede noter i tyve måneder gør det
+	// samme i virkeligheden.
+	await page.setViewportSize({ width: 1100, height: 380 });
+	await page.waitForTimeout(300);
+	await expect(
+		page.locator('li').filter({ hasText: 'Gruppe to' }).first(),
+		'rækkerne blev klippet væk, da der ikke var plads'
+	).toBeVisible();
+	// Og rulningen ligger på kassen om grupperne, ikke på hver liste for sig.
+	const scroller = await page
+		.locator('.list')
+		.evaluate((el) => getComputedStyle(el).overflowY);
+	expect(scroller, 'kassen om grupperne ruller ikke').toBe('auto');
+	const inner = await page
+		.locator('.list ul')
+		.first()
+		.evaluate((el) => getComputedStyle(el).overflowY);
+	expect(inner, 'den enkelte liste ruller stadig for sig').toBe('visible');
+	await page.setViewportSize({ width: 1280, height: 720 });
+
+	// Arkivet grupperes på samme måde. Det er dér, det betyder mest.
+	await row.hover();
+	await row.getByRole('button', { name: /Arkivér/i }).click();
+	await page.getByRole('button', { name: 'Vis arkivet' }).click();
+	await expect(
+		page.locator('h3.group'),
+		'arkivet står ugrupperet'
+	).not.toHaveCount(0);
+	await expect(page.locator('li').filter({ hasText: 'Gruppe én' }).first()).toBeVisible();
+
+	expect(trouble).toEqual([]);
+});
+
+/**
+ * Et projekts kalender kan vises som en uge.
+ *
+ * Ugen fandtes på Kommende og på Kalender, men ikke dér, hvor et projekt bor — og
+ * det er dér, "hvornår sker de her fire ting" oftest bliver spurgt.
+ *
+ * Inde i kalendervisningen frem for som en fjerde `view_mode`. Den er projektets
+ * og delt med alle, der kan se det, mens uge eller måned er et spørgsmål om, hvor
+ * bred skærmen er, foran hvilken der sidder én person — og en fjerde værdi ville
+ * kræve en tabelombygning, fordi SQLite ikke kan ændre et CHECK på plads.
+ */
+test('et projekts kalender kan vises som en uge', async ({ page }) => {
+	const trouble = watchForTrouble(page);
+	await page.goto('/');
+
+	const sidebar = page.getByRole('navigation', { name: 'Hovedmenu' });
+	await sidebar.getByRole('button', { name: 'Nyt projekt' }).click();
+	await sidebar.getByLabel('Projektnavn').fill('Ugeprojekt');
+	await sidebar.getByLabel('Projektnavn').press('Enter');
+	await expect(page.getByRole('heading', { name: 'Ugeprojekt' })).toBeVisible();
+
+	const box = page.getByLabel('Ny opgave');
+	await box.fill('male døren i dag kl 10');
+	await box.press('Enter');
+	await expect(page.getByText('male døren')).toBeVisible();
+
+	await page.getByRole('button', { name: 'Kalender', exact: true }).click();
+	await page.getByRole('button', { name: 'Uge', exact: true }).click();
+
+	// Døgnet, ikke en rude: opgaven står på sit klokkeslæt.
+	const placed = page.locator('.tevent.task').filter({ hasText: 'male døren' });
+	await expect(placed, 'opgaven står ikke på døgnet').toBeVisible();
+	await expect(placed).toContainText('10:00');
+
+	// Valget huskes — i browseren, ikke på projektet: det er skærmens bredde, der
+	// afgør det, og projektet er delt med andre skærme.
+	await page.reload();
+	await expect(page.locator('.weekgrid'), 'ugen blev ikke husket').toBeVisible();
+
+	await page.getByRole('button', { name: 'Måned', exact: true }).click();
+	await expect(page.locator('.weekgrid')).toBeHidden();
+
+	expect(trouble).toEqual([]);
+});
+
+/**
+ * En gentagelse siges på læserens sprog, også dem serveren kun kan på dansk.
+ *
+ * `recurrence.Describe` skriver dansk og kan ikke bare tage en locale med:
+ * `toTaskJSON` har niogtyve kaldesteder, og mange er WebSocket-udsendelser, hvor én
+ * nyttelast når alle i et projekt på én gang — der findes ikke ét sprog at skrive
+ * den i. Reglen er den samme uanset hvem der læser den, så beskrivelsen hører
+ * hjemme dér, hvor læseren er.
+ *
+ * De to her er valgt, fordi de *ikke* står på listen over de fem almindelige, som
+ * fladen altid har kunnet navngive. Før det her faldt de tilbage til serverens
+ * tekst — og den er dansk, hvad end kontoen er sat til.
+ */
+test('en gentagelse, serveren kun kan på dansk, siges alligevel i fladen', async ({ page }) => {
+	const trouble = watchForTrouble(page);
+	await page.goto('/');
+
+	for (const [text, says] of [
+		['vande planterne hver mandag', 'hver mandag'],
+		['tømme opvasker hverdage', 'hverdage']
+	]) {
+		const box = page.getByLabel('Ny opgave');
+		await box.fill(text);
+		await box.press('Enter');
+		await page.waitForTimeout(400);
+
+		// I indbakken og ikke på I dag: en ugentlig regel sætter den første
+		// forfaldsdag til den næste sådan dag, som sjældent er i dag.
+		await page
+			.getByRole('navigation', { name: 'Hovedmenu' })
+			.getByRole('link', { name: /^Indbakke/ })
+			.click();
+
+		const name = text.split(' ').slice(0, 2).join(' ');
+		const row = page.locator('.row', { hasText: name }).first();
+		await expect(row).toBeVisible();
+		await expect(
+			row.locator('.repeat'),
+			`"${text}" blev ikke læst som en gentagelse`
+		).toContainText(says);
+
+		await page.goto('/');
+	}
+
+	expect(trouble).toEqual([]);
+});

web/scripts/generate-screenshots.js

@@ -73,6 +73,11 @@ const SHOTS = [
 	{ name: 'detail', path: (ids) => `/opgave/${ids.detail}`, theme: 'dark' },
 	{ name: 'notes', path: '/noter', theme: 'dark', prepare: openMeetingNote },
 	{ name: 'notes-source', path: '/noter', theme: 'dark', prepare: showNoteSource },
+	// The new work, and in the light theme, which is what most people want to look
+	// at a landing page in. The calendar drawing tasks to their length, and a note
+	// somebody shared into the "Shared with me" group.
+	{ name: 'calendar-light', path: '/kalender', theme: 'light', prepare: showWeek },
+	{ name: 'notes-shared-light', path: '/noter', theme: 'light', prepare: openSharedNote },
 	{ name: 'delegated', path: '/uddelegeret', theme: 'dark' },
 	{ name: 'settings', path: '/indstillinger/integrationer', theme: 'dark' },
 	// Scrolled, because the themes are the second panel on the page and a picture
@@ -114,6 +119,13 @@ async function showNoteSource(page) {
 	await page.waitForTimeout(600);
 }
 
+async function openSharedNote(page) {
+	// The note Mette shared in, so the "Shared with me" group and its owner chip are
+	// what the picture is of rather than something the group happens to sit above.
+	await page.locator('button.row', { hasText: 'Packaging quotes' }).first().click();
+	await page.waitForTimeout(600);
+}
+
 async function showThemes(page) {
 	// scrollIntoView rather than Playwright's scrollIntoViewIfNeeded: the heading is
 	// already a few pixels inside the viewport when the page loads, so "if needed"
@@ -340,6 +352,23 @@ async function handOver(ids) {
 	await api(`/tasks/${ids.detail}/comments`, {
 		body: 'Room is booked for ten. Summer numbers are in the shared folder — the labels are still with the printer, I chase them Thursday.'
 	});
+
+	// A note of Mette's own, handed to the owner — so their Notes page has a
+	// "Shared with me" group with a real note in it, marked as hers. This is the
+	// other half of sharing: not the project path, but a page passed to a person.
+	const note = await api('/notes', {
+		body: `# Packaging quotes
+
+Three back, one still to come:
+
+- **Nordfelt** — 79 øre a bag at 2,000, plates included
+- **Kolding Karton** — 84 øre, faster, kinder about small runs
+- Bruun still owes me a number
+
+I'd lean Kolding for the first run and revisit at volume. #Autumn launch`
+	});
+	await api(`/notes/${note.id}/shares`, { user_id: ids.owner, role: 'editor' });
+
 	return { colleague: me.id };
 }
 
@@ -373,6 +402,8 @@ async function seed({ colleague, noteTitle }) {
 		).padStart(2, '0')}`;
 	};
 
+	const me = await api('/auth/me', null, 'GET');
+
 	// Two headings over the projects, which is what the sidebar grew for.
 	const work = await api('/project-groups', { name: 'Work' });
 	const home = await api('/project-groups', { name: 'Home' });
@@ -420,6 +451,17 @@ async function seed({ colleague, noteTitle }) {
 		{ content: 'Water the greenhouse', due_date: day(0), recurrence_rule: 'FREQ=DAILY', project_id: garden.id },
 		{ content: 'Collect the parcel from the post office', due_date: day(0), labels: ['errands'] },
 
+		// A handful given a time and a length, so the calendar's week draws them to
+		// scale rather than as a row of identical blocks — a stand-up, a long
+		// planning block, a call, a review. Spread across the day and the days, so
+		// the picture is a week that has a shape.
+		{ content: 'Stand-up', due_date: day(0), due_time: '09:00', duration_min: 15, project_id: launch.id, section_id: inFlight.id },
+		{ content: 'Planning block', due_date: day(0), due_time: '10:00', duration_min: 90, priority: 2, project_id: launch.id, section_id: planning.id, labels: ['meeting'] },
+		{ content: 'Call with the printer', due_date: day(0), due_time: '13:30', duration_min: 30, project_id: launch.id, labels: ['waiting'] },
+		{ content: 'Interview: designer', due_date: day(1), due_time: '11:00', duration_min: 60, priority: 1, project_id: launch.id, section_id: inFlight.id },
+		{ content: 'Budget review', due_date: day(2), due_time: '14:00', duration_min: 45, priority: 1, project_id: launch.id, section_id: inFlight.id },
+		{ content: 'One-to-one with Mette', due_date: day(3), due_time: '15:30', duration_min: 30, project_id: launch.id },
+
 		// The next couple of weeks, so Upcoming and the month grid have something in
 		// them rather than a row of empty cells.
 		{ content: 'Book a plumber for the bathroom', due_date: day(1), priority: 2, project_id: house.id },
@@ -560,6 +602,7 @@ The opening notes are a task, so they can be ticked off: task:${detail.id}`
 	await api('/users', { email: 'anders@example.dk' });
 
 	return {
+		owner: me.id,
 		work: launch.id,
 		detail: detail.id,
 		invite: invite.link,

web/src/lib/api.js

@@ -366,6 +366,8 @@ export const api = {
 	pushKey: () => get('/push/key'),
 	subscribePush: (subscription) => post('/push/subscribe', subscription),
 	unsubscribePush: (endpoint) => post('/push/unsubscribe', { endpoint, keys: {} }),
+	// Teksten kommer herfra, fordi ordbøgerne gør. Serveren har ingen.
+	testPush: (title, body) => post('/push/test', { title, body }),
 
 	// --- integrations
 	getMailAddress: () => get('/mail-address'),
@@ -381,6 +383,10 @@ export const api = {
 	// an event, only which calendars to look at.
 	getCalendar: () => get('/calendar'),
 	setCalendars: (shown) => put('/calendar/calendars', { shown }),
+	// En kalender, man kun har en adresse til. Flere pr. person, hvor Google er
+	// én: adressen er identiteten, som tokenet er det for OAuth.
+	subscribeCalendar: (url, name) => post('/calendar/subscriptions', { url, name }),
+	unsubscribeCalendar: (id) => del(`/calendar/subscriptions/${id}`),
 	disconnectCalendar: () => del('/calendar'),
 	authorizeCalendar: () => post('/calendar/authorize'),
 	syncCalendar: () => post('/calendar/sync'),
@@ -399,6 +405,12 @@ export const api = {
 	deleteNote: (id) => del(`/notes/${id}`),
 	notesLinking: (kind, targetId) => get(`/notes/linking/${kind}/${encodeURIComponent(targetId)}`),
 
+	// Sharing a note with people directly — its own access list, beside the project
+	// path. Owner only; the list call also returns who it can still be shared with.
+	noteShares: (id) => get(`/notes/${id}/shares`),
+	shareNote: (id, userId, role) => post(`/notes/${id}/shares`, { user_id: userId, role }),
+	unshareNote: (id, userId) => del(`/notes/${id}/shares/${userId}`),
+
 	// Mailboxes read over IMAP. Each belongs to the person who connected it, so
 	// there is no instance-wide registration behind these the way Gmail has one.
 	mailboxes: () => get('/mailboxes'),

web/src/lib/components/CalendarView.svelte

@@ -64,7 +64,14 @@
 		events = []
 	} = $props();
 
-	let cursor = $state(span === 'week' ? startOfWeek(new Date()) : startOfMonth(new Date()));
+	// Sat til i dag og lagt til rette af effekten nedenfor.
+	//
+	// Ikke `span === 'week' ? … : …` her: den læser `span`, som den er i det
+	// øjeblik komponenten bliver til, og fanger den værdi for altid — hvilket
+	// byggeriet har advaret om lige så længe. Så længe hver visning havde sin egen
+	// komponent, gjorde det ingen forskel; det gjorde det i samme sekund, et
+	// projekts kalender fik en uge/måned-vælger, der skifter `span` på den samme.
+	let cursor = $state(new Date());
 
 	/**
 	 * The weekday names, from Intl rather than written out.
@@ -101,13 +108,26 @@
 	// week with a cursor on the 1st would otherwise show the week containing the
 	// 1st rather than the week you were looking at, and switching back would land
 	// on whichever month that week happened to start in.
+	//
+	// Med én undtagelse, og den er hele grunden til at det her er en effekt og ikke
+	// en udregning: en månedsvisnings markør *er* den første i måneden. Skifter man
+	// til uge, mens man står i den indeværende måned, er den uge man kigger på ikke
+	// ugen omkring den 1. — det er den, i dag ligger i. Uden det her landede et
+	// projekts kalender på "27. jul.–2. aug." for en person, der kiggede på august.
 	$effect(() => {
-		const aligned = startOfSpan(cursor);
+		const anchor =
+			span === 'week' && isMonthStart(cursor) && sameMonth(cursor, new Date())
+				? new Date()
+				: cursor;
+		const aligned = startOfSpan(anchor);
 		// Compared by value, not identity: assigning a fresh Date on every run would
 		// re-trigger this effect forever, since the effect reads what it writes.
 		if (aligned.getTime() !== cursor.getTime()) cursor = aligned;
 	});
 
+	const isMonthStart = (d) => d.getDate() === 1;
+	const sameMonth = (a, b) => a.getFullYear() === b.getFullYear() && a.getMonth() === b.getMonth();
+
 	function iso(d) {
 		return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(
 			d.getDate()
@@ -266,12 +286,63 @@
 	/** The cell lit up under the pointer. */
 	let over = $state(null);
 
+	// A resize in progress: which task, and where its foot is being dragged to, in
+	// minutes since midnight. Kept apart from the stored length so the task can
+	// follow the handle live and only be written when the drag ends.
+	let resizing = $state(null);
+
+	/**
+	 * Dragging the foot of a timed task changes how long it is.
+	 *
+	 * Pointer events rather than the HTML5 drag the body uses: the two must not be
+	 * the same gesture, or every attempt to make a task longer would instead pick it
+	 * up and move it. stopPropagation keeps the handle's press from starting the
+	 * move, and the column it lives in is what the minutes are measured against —
+	 * the same box onDropAt reads a drop time from.
+	 */
+	function startResize(event, task, date) {
+		event.stopPropagation();
+		event.preventDefault();
+		const col = event.currentTarget.closest('.daycol');
+		if (!col || !task.due_datetime) return;
+		const at = new Date(task.due_datetime);
+		const from = at.getHours() * 60 + at.getMinutes();
+		resizing = { id: task.id, from, to: from + (task.duration_min || 30), date: iso(date) };
+
+		const onMove = (e) => {
+			const box = col.getBoundingClientRect();
+			const share = Math.min(Math.max((e.clientY - box.top) / box.height, 0), 1);
+			const minutes = hours.from * 60 + share * hours.minutes;
+			// Quarter-hour steps, at least a quarter long, never past midnight.
+			const snapped = Math.min(Math.max(Math.round(minutes / 15) * 15, from + 15), 24 * 60);
+			resizing = { ...resizing, to: snapped };
+		};
+		const onUp = async () => {
+			window.removeEventListener('pointermove', onMove);
+			window.removeEventListener('pointerup', onUp);
+			const current = resizing;
+			resizing = null;
+			if (current) await app.resize(current.id, current.to - current.from);
+		};
+		window.addEventListener('pointermove', onMove);
+		window.addEventListener('pointerup', onUp);
+	}
+
 	function onDragOver(event, date) {
 		if (!carries(event, TASK)) return;
 		accept(event);
 		over = iso(date);
 	}
 
+	/**
+	 * Sluppet på en dag, uden at sige noget om klokkeslættet — så beholder opgaven
+	 * det, den har. Måneden er den her: en rude er en dag, ikke et døgn, og der er
+	 * ingen tid at læse ud af hvor man slap.
+	 *
+	 * Det var ikke sådan før. Trækket sendte kun datoen, og serveren læser en dato
+	 * uden en tid som "ryd tiden" — så en opgave klokken 14 mistede sit
+	 * klokkeslæt ved at blive flyttet til dagen efter, uden at nogen bad om det.
+	 */
 	async function onDrop(event, date) {
 		event.preventDefault();
 		const id = dragged(event, TASK);
@@ -280,6 +351,44 @@
 		await app.reschedule(id, iso(date));
 	}
 
+	/**
+	 * Sluppet et sted på døgnet: dér, man slap, er klokkeslættet.
+	 *
+	 * Målt mod søjlens egen kasse frem for mod siden, så det bliver rigtigt, uanset
+	 * hvor gitteret sidder, og uanset hvor langt der er rullet.
+	 *
+	 * Rundet til kvarter. Minuttet under markøren er ikke en oplysning, nogen har —
+	 * pegefingeren er bredere end et minut — og 14:07 er et tal, der ser ud som om
+	 * det blev valgt, hvilket er værre end at være omtrentligt.
+	 */
+	async function onDropAt(event, date) {
+		event.preventDefault();
+		const id = dragged(event, TASK);
+		over = null;
+		if (!id) return;
+
+		const box = event.currentTarget.getBoundingClientRect();
+		const share = Math.min(Math.max((event.clientY - box.top) / box.height, 0), 1);
+		const minutes = hours.from * 60 + share * hours.minutes;
+		const snapped = Math.min(Math.round(minutes / 15) * 15, 24 * 60 - 15);
+		await app.reschedule(id, iso(date), clock(snapped));
+	}
+
+	/**
+	 * Sluppet i båndet foroven: opgaven har en dag og ingen tid.
+	 *
+	 * Den tomme streng er ikke det samme som ingenting her — den siger "ryd", hvor
+	 * `undefined` siger "behold". Det er hele grunden til, at de to er skilt ad i
+	 * `reschedule`.
+	 */
+	async function onDropAllDay(event, date) {
+		event.preventDefault();
+		const id = dragged(event, TASK);
+		over = null;
+		if (!id) return;
+		await app.reschedule(id, iso(date), '');
+	}
+
 	// --- ugen som et døgn ---------------------------------------------------------
 	//
 	// En uge, hvor hver dag er en punktopstilling, svarer på "hvad skal der ske
@@ -327,7 +436,16 @@
 			if (!task.due_datetime) continue;
 			const at = new Date(task.due_datetime);
 			const from = at.getHours() * 60 + at.getMinutes();
-			out.push({ kind: 'task', ref: task, from, to: from + 30 });
+			// The task's own length, not a fixed half hour. A quarter-hour floor so a
+			// zero-minute task is still something to see and grab, and the end of the
+			// day is the ceiling. While a resize is in flight this task follows the
+			// handle instead of its stored length.
+			let to =
+				resizing && resizing.id === task.id
+					? resizing.to
+					: from + (task.duration_min || 30);
+			to = Math.min(Math.max(to, from + 15), 24 * 60);
+			out.push({ kind: 'task', ref: task, from, to });
 		}
 
 		return out.toSorted((a, b) => a.from - b.from || a.to - b.to);
@@ -480,12 +598,13 @@
 		</svelte:element>
 	{/snippet}
 
-	{#snippet taskChip(task, kind, extra = '', at = '')}
+	{#snippet taskChip(task, kind, extra = '', at = '', date = null)}
 		<!-- Draggable as well as clickable: moving something to another day is the
 		     whole reason to be looking at a calendar. The browser needs a few pixels
 		     of movement before it calls a press a drag, so the click survives. -->
 		<button
 			class={kind}
+			class:resizing={resizing?.id === task.id}
 			data-priority={task.priority}
 			draggable="true"
 			ondragstart={(e) => startDrag(e, TASK, task.id)}
@@ -495,6 +614,16 @@
 		>
 			{#if at}<span class="at">{at}</span>{/if}
 			{task.content}
+			<!-- Only a task standing at a time can be made longer, and only where the
+			     grid has room to show it — the timed column, which passes the date. -->
+			{#if date && task.due_datetime}
+				<span
+					class="resize"
+					title={t('cal.resize')}
+					aria-hidden="true"
+					onpointerdown={(e) => startResize(e, task, date)}
+				></span>
+			{/if}
 		</button>
 	{/snippet}
 
@@ -525,7 +654,7 @@
 						class:over={over === iso(date)}
 						ondragover={(e) => onDragOver(e, date)}
 						ondragleave={() => (over = null)}
-						ondrop={(e) => onDrop(e, date)}
+						ondrop={(e) => onDropAllDay(e, date)}
 					>
 						{#each untimedOn(date) as item (item.kind + item.ref.id)}
 							{#if item.kind === 'event'}
@@ -556,7 +685,7 @@
 						class:over={over === iso(date)}
 						ondragover={(e) => onDragOver(e, date)}
 						ondragleave={() => (over = null)}
-						ondrop={(e) => onDrop(e, date)}
+						ondrop={(e) => onDropAt(e, date)}
 					>
 						{#each Array(hours.count) as _, i}
 							<div class="hourline" style="top:{(i / hours.count) * 100}%"></div>
@@ -565,7 +694,7 @@
 							{#if item.kind === 'event'}
 								{@render eventChip(item.ref, date, 'tevent', place(item))}
 							{:else}
-								{@render taskChip(item.ref, 'tevent task', place(item), clock(item.from))}
+								{@render taskChip(item.ref, 'tevent task', place(item), clock(item.from), date)}
 							{/if}
 						{/each}
 					</div>
@@ -870,6 +999,29 @@
 		cursor: grab;
 	}
 
+	/* The grip along the foot of a task, for dragging its length. Out of the way
+	   until the task is hovered or being resized, so it never competes with the
+	   words above it. */
+	.tevent.task .resize {
+		position: absolute;
+		left: 0;
+		right: 0;
+		bottom: 0;
+		height: 7px;
+		cursor: ns-resize;
+		opacity: 0;
+		touch-action: none;
+	}
+	.tevent.task:hover .resize,
+	.tevent.task.resizing .resize {
+		opacity: 1;
+		background: linear-gradient(to bottom, transparent, var(--line-strong));
+	}
+	.tevent.task.resizing {
+		cursor: ns-resize;
+		z-index: 5;
+	}
+
 	.tevent.task[data-priority='1'] {
 		border-left-color: var(--p1);
 	}

web/src/lib/components/NoteEditor.svelte

@@ -20,7 +20,7 @@
 	import { api, humanMessage } from '$lib/api.js';
 	import { colorVar } from '$lib/colors.js';
 
-	let { note, onchange, onsave } = $props();
+	let { note, notes = [], onchange, onsave, onopennote } = $props();
 
 	let editor;
 	// Forslagslisten, så tastaturvalget kan rulle den frem.
@@ -120,11 +120,99 @@
 
 	function setStyle(style) {
 		stylesOpen = false;
+		editor?.focus();
 		if (style.key === 'bullet') return apply('insertUnorderedList');
 		if (style.key === 'numbered') return apply('insertOrderedList');
+
+		// formatBlock is unreliable around <pre>. Asked to turn a monospace line back
+		// into body, Chromium and WebKit nest a <p> *inside* the <pre> —
+		// `<pre>…<p>body</p></pre>` — so the text stays monospace and there is no way
+		// out of the block from the menu. Do any conversion that touches a <pre> by
+		// hand, replacing the element rather than reformatting inside it.
+		const block = currentBlock();
+		if (block && (block.tagName === 'PRE' || style.tag === 'pre')) {
+			replaceBlock(block, style.tag);
+			return;
+		}
 		apply('formatBlock', style.tag);
 	}
 
+	/**
+	 * Replaces a block element with one of another tag, keeping its contents and the
+	 * caret. Used where execCommand cannot be trusted — converting to or from a
+	 * <pre>, which it either nests or ignores.
+	 */
+	function replaceBlock(block, tag) {
+		// The copy button lives inside the <pre> so it can sit in its corner; it is
+		// not text and must not travel into a paragraph. addCopyButtons puts it back
+		// on the next render for any <pre> that still needs one.
+		block.querySelectorAll?.('.copy').forEach((b) => b.remove());
+
+		const el = document.createElement(tag);
+		while (block.firstChild) el.appendChild(block.firstChild);
+		if (!el.firstChild) el.appendChild(document.createElement('br'));
+		block.replaceWith(el);
+
+		const range = document.createRange();
+		range.selectNodeContents(el);
+		range.collapse(false);
+		const selection = window.getSelection();
+		selection.removeAllRanges();
+		selection.addRange(range);
+
+		readState();
+		changed();
+	}
+
+	/**
+	 * Steps out of a code block on Enter.
+	 *
+	 * A <pre> is preformatted, so the browser answers Enter by inserting a <br> and
+	 * staying inside it — which means a monospace last line makes every line after
+	 * it monospace too, with no way back to body by typing. Plain Enter now leaves
+	 * the block: the tail after the caret becomes a paragraph below the <pre>, and
+	 * that is where the caret lands. Shift+Enter is left untouched, so a soft line
+	 * break still writes multi-line code inside the block.
+	 */
+	function exitPre(pre) {
+		pre.querySelectorAll('.copy').forEach((b) => b.remove());
+
+		const selection = window.getSelection();
+		const range = selection.getRangeAt(0);
+
+		// Everything from the caret to the end of the block leaves with the new line.
+		const tail = document.createRange();
+		tail.setStart(range.endContainer, range.endOffset);
+		tail.setEnd(pre, pre.childNodes.length);
+		const frag = tail.extractContents();
+
+		// A break at the head of what we carried is the empty line return was pressed
+		// on; it should not open the paragraph with a blank row.
+		while (frag.firstChild && frag.firstChild.nodeName === 'BR') frag.removeChild(frag.firstChild);
+
+		const p = document.createElement('p');
+		if (frag.childNodes.length) p.appendChild(frag);
+		// The split can leave an empty text node behind, and a block with no element
+		// and no text is not a caret host in Chromium — the next keystroke falls back
+		// into the block above. An empty paragraph needs a <br> to be stood in.
+		if (!p.textContent && !p.querySelector('br, img')) {
+			p.replaceChildren(document.createElement('br'));
+		}
+
+		// And the same break seen from the other side, left dangling in the <pre>.
+		while (pre.lastChild && pre.lastChild.nodeName === 'BR') pre.removeChild(pre.lastChild);
+
+		// Leaving an empty block behind is leaving nothing: the <pre> itself goes.
+		if (!pre.textContent.trim()) pre.replaceWith(p);
+		else pre.after(p);
+
+		const caret = document.createRange();
+		caret.setStart(p, 0);
+		caret.collapse(true);
+		selection.removeAllRanges();
+		selection.addRange(caret);
+	}
+
 	/** What the caret is standing in, for the toolbar's pressed states. */
 	function readState() {
 		if (!editor) return;
@@ -302,9 +390,26 @@
 		if (!node || node.nodeType !== Node.TEXT_NODE || !selection.isCollapsed) return null;
 
 		const before = node.textContent.slice(0, selection.anchorOffset);
-		const match = /(?:^|\s)#([\p{L}\p{N}_-]*)$/u.exec(before);
-		if (!match) return null;
-		return { node, start: selection.anchorOffset - match[1].length, term: match[1] };
+
+		// A note link, [[, is the same idea as a project tag and gets the same
+		// completion — checked first because it is the longer opener. The term runs
+		// to the caret and is anything up to the closing bracket, which has not been
+		// typed yet.
+		const note = /\[\[([^\]\n]*)$/u.exec(before);
+		if (note) {
+			return { kind: 'note', node, start: selection.anchorOffset - note[1].length, term: note[1] };
+		}
+
+		const project = /(?:^|\s)#([\p{L}\p{N}_-]*)$/u.exec(before);
+		if (project) {
+			return {
+				kind: 'project',
+				node,
+				start: selection.anchorOffset - project[1].length,
+				term: project[1]
+			};
+		}
+		return null;
 	}
 
 	/**
@@ -348,46 +453,87 @@
 		// pixels for hvert bogstav, mens listen snævres ind.
 		if (!suggestions.length) menuAt = tagPosition(partial);
 
-		// Alle der passer, ikke de seks første.
-		//
-		// Loftet på seks var sat, dengang listen ikke kunne rulle, og det gjorde
-		// noget værre end at skjule: med tyve projekter og et blot tastet `#` viste
-		// den seks vilkårlige og så færdig ud. Man kunne ikke se, at der manglede
-		// noget — kun at ens eget projekt ikke var der.
-		//
-		// Rækkefølgen bærer nu det, loftet gjorde forkert: det, der begynder med
-		// det tastede, står øverst, resten alfabetisk. Skriver man "ga", er
-		// GarageRisteriet den første, ikke den, der tilfældigvis lå først.
-		const matches = app.projects.filter(
-			(p) => !p.is_inbox && p.name.toLowerCase().includes(term)
-		);
-		matches.sort((a, b) => {
-			const an = a.name.toLowerCase();
-			const bn = b.name.toLowerCase();
-			const ap = an.startsWith(term);
-			const bp = bn.startsWith(term);
-			if (ap !== bp) return ap ? -1 : 1;
-			return an.localeCompare(bn, 'da');
-		});
-		suggestions = matches;
+		suggestions = partial.kind === 'note' ? noteMatches(term) : projectMatches(term);
 		chosen = 0;
 	}
 
-	/** Replaces the half-typed tag with the whole name. */
-	function accept(project) {
+	// Alle der passer, ikke de seks første. Rækkefølgen bærer det: det, der begynder
+	// med det tastede, står øverst, resten alfabetisk. Skriver man "ga", er
+	// GarageRisteriet den første, ikke den, der tilfældigvis lå først.
+	function projectMatches(term) {
+		return app.projects
+			.filter((p) => !p.is_inbox && p.name.toLowerCase().includes(term))
+			.map((p) => ({ id: p.id, kind: 'project', label: p.name, color: p.color }))
+			.sort((a, b) => rank(a.label, b.label, term));
+	}
+
+	// The same completion for [[ as for #, over the notes the page has loaded. The
+	// current note is left out — a note that links to itself is a loop nobody meant
+	// — and a note with no title yet cannot be pointed at, so it is skipped too.
+	function noteMatches(term) {
+		return notes
+			.filter((n) => n.id !== note?.id && n.title && n.title.toLowerCase().includes(term))
+			.map((n) => ({ id: n.id, kind: 'note', label: n.title }))
+			.sort((a, b) => rank(a.label, b.label, term));
+	}
+
+	function rank(a, b, term) {
+		const al = a.toLowerCase();
+		const bl = b.toLowerCase();
+		const ap = al.startsWith(term);
+		const bp = bl.startsWith(term);
+		if (ap !== bp) return ap ? -1 : 1;
+		return al.localeCompare(bl, 'da');
+	}
+
+	const escHtml = (s) => s.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
+	const escAttr = (s) => escHtml(s).replace(/"/g, '&quot;');
+
+	// A click on a note link follows it; a click anywhere else re-colours the code,
+	// as it did before. The link is contenteditable="false", so the click is a click
+	// and not a caret landing in the middle of a word.
+	function onEditorClick(event) {
+		const link = event.target.closest?.('.notelink');
+		if (link) {
+			event.preventDefault();
+			onopennote?.(link.getAttribute('data-note') ?? link.textContent);
+			return;
+		}
+		colourCode();
+	}
+
+	/** Replaces the half-typed tag with the whole thing. */
+	function accept(item) {
 		const partial = partialTag();
 		if (!partial) return;
 
 		const range = document.createRange();
-		range.setStart(partial.node, partial.start);
-		range.setEnd(partial.node, partial.start + partial.term.length);
 		const selection = window.getSelection();
-		selection.removeAllRanges();
-		selection.addRange(range);
 
-		// A trailing space, because the next thing typed is a word and not more of
-		// the tag — and without it the suggestions come straight back.
-		document.execCommand('insertText', false, project.name + ' ');
+		if (item.kind === 'note') {
+			// Swallow the opening [[ as well and drop the finished link in its place,
+			// so it is a link the moment it is chosen — not the brackets, waiting to
+			// become one when the note is next opened. A space after, as its own text,
+			// so the caret leaves the atomic link and the next word is a word.
+			range.setStart(partial.node, partial.start - 2);
+			range.setEnd(partial.node, partial.start + partial.term.length);
+			selection.removeAllRanges();
+			selection.addRange(range);
+			document.execCommand(
+				'insertHTML',
+				false,
+				`<a class="notelink" data-note="${escAttr(item.label)}" contenteditable="false">${escHtml(item.label)}</a>`
+			);
+			document.execCommand('insertText', false, ' ');
+		} else {
+			range.setStart(partial.node, partial.start);
+			range.setEnd(partial.node, partial.start + partial.term.length);
+			selection.removeAllRanges();
+			selection.addRange(range);
+			// A trailing space, or the suggestions come straight back for the tag.
+			document.execCommand('insertText', false, `${item.label} `);
+		}
+
 		suggestions = [];
 		onchange?.(htmlToMarkdown(editor));
 	}
@@ -470,6 +616,16 @@
 		}
 
 		if (event.key === 'Enter' && !event.shiftKey) {
+			// A code block is the one place the browser keeps the caret inside on
+			// Enter rather than starting a new block. Step out of it ourselves, or a
+			// monospace last line traps everything typed after it in monospace.
+			const block = currentBlock();
+			if (block && block.tagName === 'PRE') {
+				event.preventDefault();
+				exitPre(block);
+				changed();
+				return;
+			}
 			// After the split, not before it.
 			setTimeout(() => {
 				keepTitleFirst();
@@ -678,7 +834,7 @@
 			readState();
 			readSuggestions();
 		}}
-		onclick={colourCode}
+		onclick={onEditorClick}
 		onmouseup={readState}
 		{onkeydown}
 		{onpaste}
@@ -698,7 +854,7 @@
 			style:top={menuAt ? `${menuAt.top}px` : null}
 			style:left={menuAt ? `${menuAt.left}px` : null}
 		>
-			{#each suggestions as project, i (project.id)}
+			{#each suggestions as item, i (item.kind + item.id)}
 				<li>
 					<button
 						class:on={i === chosen}
@@ -706,12 +862,17 @@
 						aria-selected={i === chosen}
 						onmousedown={(e) => {
 							e.preventDefault();
-							accept(project);
+							accept(item);
 						}}
 					>
-						<span class="dot" style="background: {colorVar(project.color)}" aria-hidden="true"
-						></span>
-						#{project.name}
+						{#if item.kind === 'note'}
+							<span class="dot note" aria-hidden="true">[[</span>
+							{item.label}
+						{:else}
+							<span class="dot" style="background: {colorVar(item.color)}" aria-hidden="true"
+							></span>
+							#{item.label}
+						{/if}
 					</button>
 				</li>
 			{/each}
@@ -864,6 +1025,18 @@
 		font-size: var(--text-sm);
 	}
 
+	/* A note suggestion wears the brackets that open it where a project wears its
+	   colour, so the two kinds are told apart at a glance in the same list. */
+	.suggestions .dot.note {
+		width: auto;
+		height: auto;
+		background: none;
+		color: var(--ink-faint);
+		font-family: var(--mono, ui-monospace, monospace);
+		font-size: 0.85em;
+		line-height: 1;
+	}
+
 	.suggestions button.on {
 		background: var(--surface);
 		color: var(--ink);
@@ -1023,6 +1196,18 @@
 		margin: var(--s2) 0;
 	}
 
+	/* A note link reads as a link: the accent colour, underlined on hover, and a
+	   pointer so it is plainly something to click rather than to edit. */
+	.page :global(a.notelink) {
+		color: var(--accent);
+		text-decoration: none;
+		cursor: pointer;
+		border-radius: var(--radius-sm);
+	}
+	.page :global(a.notelink:hover) {
+		text-decoration: underline;
+	}
+
 	.page :global(blockquote) {
 		margin: 0 0 var(--s2);
 		padding-left: var(--s3);