Merge pull request #77 from kristianwind/besked-og-en-udgang

feat(projekter): en deling siger til, og der er en vej ud af den

docs/api.md

@@ -96,9 +96,10 @@ curl -X POST https://todo.example.dk/api/v1/tasks/quick-add \
 | `GET` `PATCH` `DELETE` | `/projects/{id}` | Read, change, trash. Owner only for the last two. |
 | `GET` `POST` | `/projects/{id}/sections` | |
 | `PATCH` `DELETE` | `/sections/{id}` | |
-| `GET` | `/projects/{id}/members` | |
+| `GET` | `/projects/{id}/members` | Who is on it, who can be added (`candidates`), and who has been invited and not arrived (`pending`). |
-| `POST` | `/projects/{id}/invites` | Share it. `{"email": …, "role": "editor"\|"viewer"}` |
+| `POST` | `/projects/{id}/invites` | Share it. `{"user_id": …}` for somebody who already has an account here, `{"email": …}` for anybody else — plus `"role": "editor"\|"viewer"`. An address that turns out to belong to an account is that account. |
-| `DELETE` | `/projects/{id}/members/{userID}` | |
+| `DELETE` | `/projects/{id}/invites/{inviteID}` | Withdraw an invitation before it is used. |
+| `PATCH` `DELETE` | `/projects/{id}/members/{userID}` | Change somebody's role, or take them off. |
 | `GET` | `/projects/{id}/activity` | |
 | `GET` | `/trash/projects` | What you have deleted and can still bring back, with how long is left. |
 | `POST` | `/trash/projects/{id}/restore` | Brings it back with the tasks that went with it. |

docs/index.md

@@ -40,8 +40,11 @@ forward mail to, and an MCP endpoint so Claude can work your task list directly.
   it is due.
 - **Drag where it means something** — reorder a list or a board, file a project
   under a group, drop a task on another project, or drop it on another day.
-- **Sharing** with owner, editor and viewer roles. Anyone outside your instance
+- **Sharing** with owner, editor and viewer roles. Somebody who already has an
-  joins through an invite link.
+  account here you pick by name — the accounts on an instance are a closed,
+  invited set, so they are an address book rather than a directory to protect.
+  Anyone outside your instance joins through an invite link, and the invitation
+  stays visible until they arrive, so it does not get sent twice.
 - **Live sync** — a change made by somebody else appears without a refresh.
 - **[Told when it matters](notifications.md).** A bell for what other people did to
   what you share, pushed to your devices and counted on the app's icon in the Dock.

docs/notifications.md

@@ -11,6 +11,7 @@ the app's icon.
 | --- | --- |
 | Somebody edited a note shared with you | Repeat edits fold into one line while it is unread |
 | Somebody shared a note with you | Once, when it happens |
+| Somebody shared a project with you | Once, when it happens — the entry opens the project, and its share panel has a *Leave the project* button |
 | Somebody named you in a note with `@` | Instead of "edited a note" — one act, one message |
 | Somebody gave you a task | Only on the change, and only to the person who got it |
 | Somebody commented | |

docs/openapi.yaml

@@ -2307,7 +2307,15 @@ paths:
       - { name: projectID, in: path, required: true, schema: { type: string } }
     get:
       tags: [projects]
-      summary: Who the project is shared with.
+      summary: Who the project is shared with, who can be added, and who has been invited.
+      description: >
+        Three lists in one answer, so the share panel opens complete in a single
+        round-trip. `candidates` is everybody with an account here who is not
+        already on the project — the instance's accounts are a closed, invited set,
+        so listing them to each other is the address book the feature needs, not a
+        disclosure. `pending` is the invitations sent to people who have no account
+        yet: without them an invitation sent yesterday is in neither of the other
+        two lists, and gets sent a second time.
       responses:
         "200":
           description: OK
@@ -2319,6 +2327,17 @@ paths:
                   members:
                     type: array
                     items: { $ref: "#/components/schemas/Member" }
+                  candidates:
+                    type: array
+                    items: { $ref: "#/components/schemas/Person" }
+                  pending:
+                    type: array
+                    items:
+                      type: object
+                      properties:
+                        id: { type: string }
+                        email: { type: string, format: email }
+                        role: { type: string, enum: [editor, viewer] }
         "404": { $ref: "#/components/responses/NotFound" }
 
   /api/v1/projects/{projectID}/members/{userID}:
@@ -2360,8 +2379,19 @@ paths:
         "422": { $ref: "#/components/responses/Validation" }
     delete:
       tags: [projects]
-      summary: Remove somebody from a project. Its owner only.
+      summary: Remove somebody from a project — its owner, or yourself.
       description: |
+        Two things through one route: the owner taking somebody off, and anybody
+        taking themselves off. The second is what makes a share something you can
+        undo. You are let into a project without being asked, so a way out that
+        does not go through asking its owner is the other half of that.
+
+        The owner cannot leave their own project. That is a transfer of ownership,
+        not an exit, and there is no transfer yet.
+
+        Pointing at somebody else's membership without owning the project answers
+        404 rather than 403: saying "you may not" confirms the membership exists.
+
         Their tasks are unassigned rather than left pointing at somebody who can
         no longer see the project — which is why changing a role is a PATCH and
         not a remove-and-reinvite.
@@ -2384,13 +2414,32 @@ paths:
           application/json:
             schema:
               type: object
-              required: [email, role]
               properties:
-                email: { type: string, format: email }
+                user_id:
+                  type: string
+                  description: >
+                    Somebody who already has an account here, picked from the
+                    candidates in GET /members. One of user_id or email.
+                email:
+                  type: string
+                  format: email
+                  description: >
+                    An address. If it belongs to an account they are added at
+                    once; otherwise an invitation is sent.
                 role: { type: string, enum: [editor, viewer] }
       responses:
+        "200":
+          description: Added straight away — the person already had an account.
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  added: { type: boolean }
+                  user: { $ref: "#/components/schemas/Person" }
+                  role: { type: string, enum: [editor, viewer] }
         "201":
-          description: Created
+          description: Invited. No account yet, so a link was made.
           content:
             application/json:
               schema:
@@ -2399,8 +2448,30 @@ paths:
                   link: { type: string }
                   emailed: { type: boolean }
         "404": { $ref: "#/components/responses/NotFound" }
+        "409": { $ref: "#/components/responses/Conflict" }
         "422": { $ref: "#/components/responses/Validation" }
 
+  /api/v1/projects/{projectID}/invites/{inviteID}:
+    delete:
+      tags: [projects]
+      summary: Withdraw an invitation to a project before it is used. Its owner only.
+      description: >
+        The only way back. Only the token's hash is stored, so a link sent to the
+        wrong address cannot be looked up and invalidated — only the row it belongs
+        to can.
+      parameters:
+        - name: projectID
+          in: path
+          required: true
+          schema: { type: string }
+        - name: inviteID
+          in: path
+          required: true
+          schema: { type: string }
+      responses:
+        "204": { description: Withdrawn }
+        "404": { $ref: "#/components/responses/NotFound" }
+
   /api/v1/projects/{projectID}/activity:
     parameters:
       - { name: projectID, in: path, required: true, schema: { type: string } }

docs/signing-in.md

@@ -8,6 +8,38 @@ What the first account is created with. Nothing is emailed, nothing is registere
 anywhere: the first person to open a fresh instance creates the administrator
 account, and after that people arrive by invite link.
 
+## Being let into a project
+
+Two different situations, one panel — **the project's ⋯ menu → Share**.
+
+Somebody who **already has an account here** you pick from a list by name. You do
+not need to know their email address to share a project with a colleague whose
+name you know. The accounts on an instance are a closed set — there is no open
+signup, every one of them was invited — so listing them to each other is the
+address book the feature needs, not a disclosure.
+
+Somebody who is **not here yet** you invite by email. If the address turns out to
+belong to an account it becomes an ordinary share straight away; otherwise it
+becomes a link that creates their account and their membership at once. With no
+mail server configured the link is shown in the panel instead of being sent, which
+is the correct behaviour on a one-person instance rather than an error.
+
+**You are told, and you can leave.** Being added to a project is not something
+that happens to you quietly: the bell says who shared what, and the entry takes
+you to the project. In the share panel, anybody who is not the owner has a *Leave
+the project* button. That is deliberate rather than an approval step — an
+invitation waiting on a yes means the person who shared thinks it is done while
+the work sits still. What was wrong was the other three-quarters of it: you were
+added without being asked, without being told, and with no way out except asking
+the owner. The owner cannot leave their own project; that is a transfer of
+ownership, and there is no transfer yet.
+
+An invitation that has not been taken up stays listed under the members, greyed,
+with a × to withdraw it. Without that it is invisible — the person has no account,
+so they are neither a member nor somebody you can pick — and the usual next move
+is to send it a second time. The second link works exactly as well as the first,
+and then there are two to keep track of.
+
 ## A code on top of it
 
 **Settings → Account → Two-factor.** An ordinary TOTP secret — any authenticator

internal/httpapi/notifications_handlers.go

@@ -140,6 +140,30 @@ func (s *Server) notifyNoteShared(r *http.Request, n *store.Note, userID string)
 	})
 }
 
+// notifyProjectShared tells somebody that a project is now theirs to work in.
+//
+// Indtil nu skete det i tavshed. En note delt med dig gav en besked; et projekt gav
+// ingenting — det stod bare i sidebjælken næste gang, du kiggede, uden at noget
+// sagde hvornår eller fra hvem. Et projekt er mere end en note: der kan lægges
+// opgaver til dig i det.
+//
+// Én besked, når delingen sker. En rolle, der ændres bagefter, er ikke et nyt
+// projekt at åbne, og en invitation, der bliver taget imod, er modtagerens egen
+// handling — de skal ikke have besked om det, de lige selv gjorde.
+func (s *Server) notifyProjectShared(r *http.Request, project *store.Project, userID string) {
+	if project == nil || userID == "" {
+		return
+	}
+	actor := userFrom(r.Context())
+	if actor.ID == userID {
+		return
+	}
+	s.notify(r, &store.Notification{
+		UserID: userID, ActorID: actor.ID, ProjectID: project.ID,
+		Kind: "project.shared", Title: actor.Name + " delte et projekt med dig", Body: project.Name,
+	})
+}
+
 // notifyNoteChanged tells everybody who can see a note that somebody else wrote in
 // it — folded into one line per note while it is unread.
 //

internal/httpapi/projects_handlers.go

@@ -452,22 +452,100 @@ type memberJSON struct {
 	Role        string `json:"role"`
 }
 
+// projectInviteJSON er en invitation, der venter på en konto. Der er intet navn og
+// ingen farve at vise: adressen er alt, hvad der findes om personen, indtil de
+// dukker op.
+type projectInviteJSON struct {
+	ID    string `json:"id"`
+	Email string `json:"email"`
+	Role  string `json:"role"`
+}
+
+// handleListMembers is everything the share panel needs, in one answer: who is on
+// the project, who can be added, and who has been invited and not arrived.
+//
+// Kandidaterne kommer med her frem for fra et endepunkt for sig, så panelet åbner
+// færdigt i ét kald — samme form som notens delingspanel. Og de er nødvendige:
+// indtil nu kunne et projekt kun deles ved at skrive en e-mailadresse, hvilket
+// betyder, at man skal kende adressen på en kollega, man kender navnet på.
+//
+// De inviterede står ved siden af medlemmerne, fordi de ellers hverken er i den
+// ene liste eller den anden — de har ingen konto at være medlem med, og de er
+// derfor også fraværende fra kandidaterne. Uden dem ser en invitation sendt i går
+// ud som om den aldrig blev sendt, og så bliver den sendt igen.
 func (s *Server) handleListMembers(w http.ResponseWriter, r *http.Request) {
-	members, err := s.db.ListMembers(r.Context(), chi.URLParam(r, "projectID"))
+	projectID := chi.URLParam(r, "projectID")
+
+	members, err := s.db.ListMembers(r.Context(), projectID)
 	if err != nil {
 		s.internal(w, r, "list members", err)
 		return
 	}
 	out := make([]memberJSON, 0, len(members))
+	already := map[string]bool{}
 	for _, m := range members {
 		out = append(out, memberJSON{m.UserID, m.Email, m.Name, m.AvatarColor, string(m.Role)})
+		already[m.UserID] = true
 	}
-	writeJSON(w, http.StatusOK, map[string]any{"members": out})
+
+	project, err := s.db.GetProject(r.Context(), projectID, userFrom(r.Context()).ID)
+	if err != nil {
+		s.storeError(w, r, "get project", err)
+		return
+	}
+	already[project.OwnerID] = true
+
+	people, err := s.db.UsersForSharing(r.Context(), userFrom(r.Context()).ID)
+	if err != nil {
+		s.internal(w, r, "share candidates", err)
+		return
+	}
+	candidates := make([]personJSON, 0, len(people))
+	for _, p := range people {
+		if already[p.ID] {
+			continue
+		}
+		candidates = append(candidates, personJSON{ID: p.ID, Name: p.Name, AvatarColor: p.AvatarColor})
+	}
+
+	invites, err := s.db.ListProjectInvites(r.Context(), projectID)
+	if err != nil {
+		s.internal(w, r, "list project invites", err)
+		return
+	}
+	pending := make([]projectInviteJSON, 0, len(invites))
+	for _, i := range invites {
+		pending = append(pending, projectInviteJSON{ID: i.ID, Email: i.Email, Role: string(i.Role)})
+	}
+
+	writeJSON(w, http.StatusOK, map[string]any{
+		"members":    out,
+		"candidates": candidates,
+		"pending":    pending,
+	})
+}
+
+// handleDeleteProjectInvite withdraws an invitation that has not been taken up.
+//
+// Uden den er den ventende liste kun til at se på, og en invitation sendt til en
+// forkert adresse kan ikke tages tilbage — den bliver bare liggende, til den
+// udløber, med et link, der virker hele tiden.
+func (s *Server) handleDeleteProjectInvite(w http.ResponseWriter, r *http.Request) {
+	projectID := chi.URLParam(r, "projectID")
+	err := s.db.DeleteProjectInvite(r.Context(), projectID, chi.URLParam(r, "inviteID"))
+	if err != nil {
+		s.storeError(w, r, "delete project invite", err)
+		return
+	}
+	w.WriteHeader(http.StatusNoContent)
 }
 
 type inviteRequest struct {
-	Email string `json:"email"`
+	// UserID er den, man har peget på i listen. Email er den, man kender adressen
-	Role  string `json:"role"`
+	// på — og den er også den, der virker, når der ingen konto er endnu.
+	UserID string `json:"user_id"`
+	Email  string `json:"email"`
+	Role   string `json:"role"`
 }
 
 type inviteResponse struct {
@@ -478,8 +556,14 @@ type inviteResponse struct {
 	Emailed bool   `json:"emailed"`
 }
 
-// handleInvite shares a project with somebody. An existing user is added directly;
+// handleInvite shares a project with somebody.
-// anybody else gets a link that creates their account and their membership at once.
+//
+// Der er to måder at sige, hvem det er — samme to som en note deles med. `user_id`
+// er den, man har peget på i listen, og den er grunden til at det her blev skrevet
+// om: indtil nu kunne et projekt kun deles ved at stave en e-mailadresse, altså
+// ved at kende adressen på en kollega, man kender navnet på. `email` er stadig
+// vejen til dem, der ikke er her endnu, og den bliver til et link, der opretter
+// kontoen og medlemskabet på én gang.
 func (s *Server) handleInvite(w http.ResponseWriter, r *http.Request) {
 	var req inviteRequest
 	if err := decodeJSON(w, r, &req); err != nil {
@@ -496,8 +580,13 @@ func (s *Server) handleInvite(w http.ResponseWriter, r *http.Request) {
 		writeFieldErrors(w, map[string]string{"role": "must be editor or viewer"})
 		return
 	}
+
 	email := store.NormalizeEmail(req.Email)
-	if email == "" || !strings.Contains(email, "@") {
+	if req.UserID == "" && email == "" {
+		writeFieldErrors(w, map[string]string{"user_id": "required"})
+		return
+	}
+	if req.UserID == "" && !strings.Contains(email, "@") {
 		writeFieldErrors(w, map[string]string{"email": "must be an email address"})
 		return
 	}
@@ -508,19 +597,50 @@ func (s *Server) handleInvite(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// Somebody who already has an account is added straight away: sending them
+	// En adresse, der viser sig at høre til en konto, ER den konto: at sende dem
-	// through a signup form they cannot complete would be a dead end.
+	// gennem en oprettelsesside, de ikke kan komme igennem, ville være en
-	if existing, err := s.db.UserByEmail(r.Context(), email); err == nil {
+	// blindgyde. Derfor slås adressen op først, og de to veje mødes her.
-		if existing.ID == project.OwnerID {
+	if req.UserID == "" {
+		if existing, err := s.db.UserByEmail(r.Context(), email); err == nil {
+			req.UserID = existing.ID
+		}
+	}
+
+	if req.UserID != "" {
+		if req.UserID == project.OwnerID {
 			writeError(w, http.StatusConflict, CodeConflict, "that person already owns this project")
 			return
 		}
-		if err := s.db.AddMember(r.Context(), projectID, existing.ID, role); err != nil {
+		// Slået op frem for taget på ordet: et id, der ikke findes, ville ellers
+		// blive til en medlemsrække, der peger på ingen — og panelet ville vise en
+		// tom plads, ingen kan fjerne.
+		person, err := s.db.PersonByID(r.Context(), req.UserID)
+		if err != nil {
+			writeError(w, http.StatusNotFound, CodeNotFound, "no such person")
+			return
+		}
+		if err := s.db.AddMember(r.Context(), projectID, person.ID, role); err != nil {
 			s.internal(w, r, "add member", err)
 			return
 		}
-		s.activity(r, projectID, "", "member.added", map[string]any{"email": email, "role": string(role)})
+		s.activity(r, projectID, "", "member.added", map[string]any{"name": person.Name, "role": string(role)})
-		writeJSON(w, http.StatusOK, map[string]any{"added": true})
+		// Og de får det at vide. Før stod projektet bare i sidebjælken næste gang,
+		// de kiggede — uden at noget sagde hvornår eller fra hvem.
+		s.notifyProjectShared(r, project, person.ID)
+		writeJSON(w, http.StatusOK, map[string]any{
+			"added": true,
+			// Personen sendes med retur, fordi fladen kan have delt med en adresse
+			// og derfor ikke selv ved, hvem den ramte.
+			"user": personJSON{ID: person.ID, Name: person.Name, AvatarColor: person.AvatarColor},
+			"role": string(role),
+		})
+		return
+	}
+
+	// Et andet link til den samme indbakke hjælper ingen: det første virker
+	// stadig, og nu er der to at holde styr på og to at trække tilbage.
+	if pending, err := s.db.PendingProjectInvite(r.Context(), projectID, email); err == nil && pending {
+		writeError(w, http.StatusConflict, CodeConflict, "that address has already been invited")
 		return
 	}
 
@@ -590,15 +710,33 @@ func (s *Server) handleSetMemberRole(w http.ResponseWriter, r *http.Request) {
 	w.WriteHeader(http.StatusNoContent)
 }
 
+// handleRemoveMember takes somebody off a project — the owner removing anybody, or
+// anybody removing themselves.
+//
+// Den anden halvdel er ny, og den er grunden til at ruten er flyttet ud af
+// ejer-gruppen. Man blev lukket ind i et projekt uden at blive spurgt, og kunne så
+// ikke komme ud igen: kun ejeren kunne fjerne en, også en selv. To af de tre ting
+// kan man leve med; alle tre er det, der gør en deling til noget, der sker for en.
+//
+// Ejeren kan stadig ikke gå fra sit eget projekt. Det er ikke en udgang, det er en
+// overdragelse, og den findes ikke endnu.
 func (s *Server) handleRemoveMember(w http.ResponseWriter, r *http.Request) {
 	projectID := chi.URLParam(r, "projectID")
 	userID := chi.URLParam(r, "userID")
+	me := userFrom(r.Context())
 
 	owner, err := s.db.ProjectOwner(r.Context(), projectID)
 	if err != nil {
 		s.storeError(w, r, "project owner", err)
 		return
 	}
+
+	// 404 og ikke 403: at sige "det må du ikke" til en, der peger på en anden
+	// persons medlemskab, bekræfter at medlemskabet findes.
+	if me.ID != owner && userID != me.ID {
+		writeError(w, http.StatusNotFound, CodeNotFound, "no such member")
+		return
+	}
 	if userID == owner {
 		writeError(w, http.StatusConflict, CodeConflict,
 			"the owner cannot be removed from their own project")

internal/httpapi/projects_test.go

@@ -486,3 +486,239 @@ func TestASectionHoldsMoreThanOneTask(t *testing.T) {
 		}
 	}
 }
+
+// Et projekt kunne kun deles ved at stave en e-mailadresse. Det er den forkerte
+// vej at spørge om en kollega, man kender navnet på og sidder i samme rum som — og
+// på en instans, hvor konti kun bliver til ved invitation, er der ikke noget at
+// beskytte ved at lade være med at vise dem.
+func TestAProjectCanBeSharedWithSomebodyWhoIsAlreadyHere(t *testing.T) {
+	ts := newTestServer(t)
+	ts.bootstrap(t)
+	ts.newUser(t, "anden@example.dk", "Anden")
+
+	anden, err := ts.db.UserByEmail(t.Context(), "anden@example.dk")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, project := ts.do(t, "POST", "/api/v1/projects", map[string]any{"name": "Firma"})
+	projectID := project["id"].(string)
+
+	// Først står de i listen over dem, der kan tilføjes.
+	_, before := ts.do(t, "GET", "/api/v1/projects/"+projectID+"/members", nil)
+	if !hasPerson(before["candidates"], anden.ID) {
+		t.Fatalf("Anden er ikke blandt kandidaterne: %v", before["candidates"])
+	}
+
+	// Delt ved at pege, ikke ved at stave.
+	resp, added := ts.do(t, "POST", "/api/v1/projects/"+projectID+"/invites",
+		map[string]any{"user_id": anden.ID, "role": "editor"})
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("status %d, body %v", resp.StatusCode, added)
+	}
+	// Personen kommer med retur, så fladen kan tegne rækken uden at spørge igen.
+	if user, _ := added["user"].(map[string]any); user["name"] != "Anden" {
+		t.Errorf("user = %v, want Anden", added["user"])
+	}
+
+	// Og bagefter er de et medlem og ikke længere en kandidat: en liste, der
+	// tilbyder at tilføje en, der allerede er der, er en liste, man gør det i.
+	_, after := ts.do(t, "GET", "/api/v1/projects/"+projectID+"/members", nil)
+	if hasPerson(after["candidates"], anden.ID) {
+		t.Errorf("Anden står stadig som kandidat efter at være tilføjet")
+	}
+	found := false
+	for _, raw := range after["members"].([]any) {
+		if m := raw.(map[string]any); m["user_id"] == anden.ID {
+			found = true
+			if m["role"] != "editor" {
+				t.Errorf("role = %v, want editor", m["role"])
+			}
+		}
+	}
+	if !found {
+		t.Errorf("Anden blev ikke medlem: %v", after["members"])
+	}
+}
+
+// Ejeren skal ikke kunne tilbydes som en, projektet kan deles med — de har det.
+func TestTheOwnerIsNotOfferedAsSomebodyToShareWith(t *testing.T) {
+	ts := newTestServer(t)
+	ts.bootstrap(t)
+
+	me, err := ts.db.UserByEmail(t.Context(), "kristian@example.dk")
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, project := ts.do(t, "POST", "/api/v1/projects", map[string]any{"name": "Mit"})
+
+	_, body := ts.do(t, "GET", "/api/v1/projects/"+project["id"].(string)+"/members", nil)
+	if hasPerson(body["candidates"], me.ID) {
+		t.Errorf("ejeren står som kandidat til sit eget projekt")
+	}
+}
+
+// En invitation, der venter, står ved siden af medlemmerne — og kan tages tilbage.
+//
+// Uden den er den usynlig: personen har ingen konto, så de er hverken medlem eller
+// kandidat, og så bliver invitationen sendt igen. Det andet link virker lige så
+// godt som det første, og så er der to at trække tilbage i stedet for et.
+func TestAPendingInviteIsVisibleAndCanBeWithdrawn(t *testing.T) {
+	ts := newTestServer(t)
+	ts.bootstrap(t)
+
+	_, project := ts.do(t, "POST", "/api/v1/projects", map[string]any{"name": "Firma"})
+	projectID := project["id"].(string)
+
+	resp, _ := ts.do(t, "POST", "/api/v1/projects/"+projectID+"/invites",
+		map[string]any{"email": "fremmed@example.dk", "role": "viewer"})
+	if resp.StatusCode != http.StatusCreated {
+		t.Fatalf("invitation: status %d", resp.StatusCode)
+	}
+
+	_, body := ts.do(t, "GET", "/api/v1/projects/"+projectID+"/members", nil)
+	pending, _ := body["pending"].([]any)
+	if len(pending) != 1 {
+		t.Fatalf("%d ventende invitationer, want 1: %v", len(pending), body["pending"])
+	}
+	first := pending[0].(map[string]any)
+	if first["email"] != "fremmed@example.dk" {
+		t.Errorf("email = %v", first["email"])
+	}
+
+	// Et andet link til den samme indbakke hjælper ingen.
+	if resp, _ := ts.do(t, "POST", "/api/v1/projects/"+projectID+"/invites",
+		map[string]any{"email": "fremmed@example.dk", "role": "viewer"}); resp.StatusCode != http.StatusConflict {
+		t.Errorf("en gentaget invitation gav %d, want 409", resp.StatusCode)
+	}
+
+	resp, _ = ts.do(t, "DELETE",
+		"/api/v1/projects/"+projectID+"/invites/"+first["id"].(string), nil)
+	if resp.StatusCode != http.StatusNoContent {
+		t.Fatalf("tilbagetrækning: status %d", resp.StatusCode)
+	}
+
+	_, after := ts.do(t, "GET", "/api/v1/projects/"+projectID+"/members", nil)
+	if p, _ := after["pending"].([]any); len(p) != 0 {
+		t.Errorf("invitationen står der stadig: %v", after["pending"])
+	}
+}
+
+// Et id, der ikke findes, må ikke blive til en medlemsrække, der peger på ingen.
+func TestSharingWithSomebodyWhoDoesNotExistIsRefused(t *testing.T) {
+	ts := newTestServer(t)
+	ts.bootstrap(t)
+
+	_, project := ts.do(t, "POST", "/api/v1/projects", map[string]any{"name": "Firma"})
+	resp, _ := ts.do(t, "POST", "/api/v1/projects/"+project["id"].(string)+"/invites",
+		map[string]any{"user_id": "0198f000-0000-7000-8000-00000000dead", "role": "editor"})
+	if resp.StatusCode != http.StatusNotFound {
+		t.Errorf("status %d, want 404", resp.StatusCode)
+	}
+}
+
+// hasPerson siger, om en liste af personer indeholder et bestemt id.
+func hasPerson(raw any, id string) bool {
+	list, _ := raw.([]any)
+	for _, item := range list {
+		if p, ok := item.(map[string]any); ok && p["id"] == id {
+			return true
+		}
+	}
+	return false
+}
+
+// Man bliver lukket ind i et projekt uden at blive spurgt. Så skal man i det
+// mindste vide det — og kunne gå ud igen uden at bede ejeren om lov.
+func TestBeingAddedToAProjectIsToldAndCanBeUndone(t *testing.T) {
+	ts := newTestServer(t)
+	ts.bootstrap(t)
+	anden := ts.newUser(t, "anden@example.dk", "Anden")
+
+	andenUser, err := ts.db.UserByEmail(t.Context(), "anden@example.dk")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, project := ts.do(t, "POST", "/api/v1/projects", map[string]any{"name": "Fælleshuset"})
+	projectID := project["id"].(string)
+	ts.do(t, "POST", "/api/v1/projects/"+projectID+"/invites",
+		map[string]any{"user_id": andenUser.ID, "role": "editor"})
+
+	// Beskeden. Før stod projektet bare i sidebjælken næste gang, de kiggede.
+	_, inbox := anden.do(t, "GET", "/api/v1/notifications", nil)
+	var shared map[string]any
+	for _, raw := range inbox["notifications"].([]any) {
+		if n := raw.(map[string]any); n["kind"] == "project.shared" {
+			shared = n
+		}
+	}
+	if shared == nil {
+		t.Fatalf("ingen besked om delingen: %v", inbox["notifications"])
+	}
+	if shared["project_id"] != projectID {
+		t.Errorf("project_id = %v, want %s — uden det fører beskeden ingen steder hen",
+			shared["project_id"], projectID)
+	}
+
+	// Udgangen.
+	resp, _ := anden.do(t, "DELETE", "/api/v1/projects/"+projectID+"/members/"+andenUser.ID, nil)
+	if resp.StatusCode != http.StatusNoContent {
+		t.Fatalf("forlad projektet: status %d", resp.StatusCode)
+	}
+	if resp, _ := anden.do(t, "GET", "/api/v1/projects/"+projectID, nil); resp.StatusCode != http.StatusNotFound {
+		t.Errorf("projektet er stadig synligt efter at være forladt: status %d", resp.StatusCode)
+	}
+}
+
+// En udgang for en selv er ikke en dør til de andres medlemskaber.
+func TestAMemberCannotRemoveAnotherMember(t *testing.T) {
+	ts := newTestServer(t)
+	ts.bootstrap(t)
+	en := ts.newUser(t, "en@example.dk", "En")
+	ts.newUser(t, "to@example.dk", "To")
+
+	enUser, err := ts.db.UserByEmail(t.Context(), "en@example.dk")
+	if err != nil {
+		t.Fatal(err)
+	}
+	toUser, err := ts.db.UserByEmail(t.Context(), "to@example.dk")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, project := ts.do(t, "POST", "/api/v1/projects", map[string]any{"name": "Delt"})
+	projectID := project["id"].(string)
+	for _, u := range []string{enUser.ID, toUser.ID} {
+		ts.do(t, "POST", "/api/v1/projects/"+projectID+"/invites",
+			map[string]any{"user_id": u, "role": "editor"})
+	}
+
+	// 404 og ikke 403: "det må du ikke" bekræfter, at medlemskabet findes.
+	resp, _ := en.do(t, "DELETE", "/api/v1/projects/"+projectID+"/members/"+toUser.ID, nil)
+	if resp.StatusCode != http.StatusNotFound {
+		t.Errorf("status %d, want 404", resp.StatusCode)
+	}
+	_, members := ts.do(t, "GET", "/api/v1/projects/"+projectID+"/members", nil)
+	if len(members["members"].([]any)) != 3 {
+		t.Errorf("%d medlemmer tilbage, want 3", len(members["members"].([]any)))
+	}
+}
+
+// Ejeren kan ikke gå fra sit eget projekt. Det ville være en overdragelse.
+func TestTheOwnerCannotLeaveTheirOwnProject(t *testing.T) {
+	ts := newTestServer(t)
+	ts.bootstrap(t)
+
+	me, err := ts.db.UserByEmail(t.Context(), "kristian@example.dk")
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, project := ts.do(t, "POST", "/api/v1/projects", map[string]any{"name": "Mit"})
+
+	resp, _ := ts.do(t, "DELETE",
+		"/api/v1/projects/"+project["id"].(string)+"/members/"+me.ID, nil)
+	if resp.StatusCode != http.StatusConflict {
+		t.Errorf("status %d, want 409", resp.StatusCode)
+	}
+}

internal/httpapi/server.go

@@ -493,6 +493,9 @@ func New(cfg *config.Config, db *store.DB, log *slog.Logger, web fs.FS) *Server
 					r.Get("/", s.handleGetProject)
 					r.Get("/sections", s.handleListSections)
 					r.Get("/members", s.handleListMembers)
+					// Uden for ejer-gruppen, fordi den nu dækker to ting: ejeren, der
+					// fjerner nogen, og den, der selv går. Handleren skiller dem ad.
+					r.Delete("/members/{userID}", s.handleRemoveMember)
 					r.Get("/activity", s.handleActivity)
 
 					r.Group(func(r chi.Router) {
@@ -506,8 +509,8 @@ func New(cfg *config.Config, db *store.DB, log *slog.Logger, web fs.FS) *Server
 						r.Patch("/", s.handleUpdateProject)
 						r.Delete("/", s.handleDeleteProject)
 						r.Post("/invites", s.handleInvite)
+						r.Delete("/invites/{inviteID}", s.handleDeleteProjectInvite)
 						r.Patch("/members/{userID}", s.handleSetMemberRole)
-						r.Delete("/members/{userID}", s.handleRemoveMember)
 					})
 				})
 			})

internal/store/invites.go

@@ -354,6 +354,89 @@ func (db *DB) DeleteNoteInvite(ctx context.Context, noteID, inviteID string) err
 	return nil
 }
 
+// --- invitationer til ét projekt --------------------------------------------------
+
+// ProjectInvite is somebody invited to a project who has not arrived yet.
+//
+// The same shape as NoteInvite and deliberately not the same type: the two rows
+// differ in which column carries the target, and one struct covering both would
+// need a field that is empty half the time — which is how a caller ends up
+// reading the wrong one.
+type ProjectInvite struct {
+	ID        string    `json:"id"`
+	Email     string    `json:"email"`
+	Role      Role      `json:"role"`
+	CreatedAt time.Time `json:"-"`
+	ExpiresAt time.Time `json:"-"`
+}
+
+// ListProjectInvites is who has been invited to a project and not yet taken it up.
+//
+// The panel needs them beside the members for the same reason the note panel does:
+// an invitation sent yesterday is otherwise invisible, so it gets sent again — a
+// second link to the same inbox, and no way to take either back. That mattered
+// less while inviting meant typing an address; it matters more now that the panel
+// offers a list to pick from, because the people who are *missing* from that list
+// are exactly the ones already invited.
+//
+// Expired ones are left out, the same rule the administrator's list follows.
+func (db *DB) ListProjectInvites(ctx context.Context, projectID string) ([]ProjectInvite, error) {
+	rows, err := db.QueryContext(ctx, `
+		SELECT id, email, role, created_at, expires_at
+		FROM invites
+		WHERE project_id = ? AND note_id IS NULL AND accepted_at IS NULL AND expires_at > ?
+		ORDER BY created_at`, projectID, time.Now().Unix())
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	out := []ProjectInvite{}
+	for rows.Next() {
+		var i ProjectInvite
+		var created, expires int64
+		if err := rows.Scan(&i.ID, &i.Email, &i.Role, &created, &expires); err != nil {
+			return nil, err
+		}
+		i.CreatedAt = time.Unix(created, 0).UTC()
+		i.ExpiresAt = time.Unix(expires, 0).UTC()
+		out = append(out, i)
+	}
+	return out, rows.Err()
+}
+
+// DeleteProjectInvite withdraws an invitation to a project, and refuses to
+// withdraw anything else.
+//
+// The project id is in the WHERE rather than checked beforehand, for the same
+// reason DeleteNoteInvite puts the note id there: the caller's ownership has been
+// established for *this* project, and a statement that can only touch this
+// project's rows cannot be talked into deleting somebody else's invite by id.
+func (db *DB) DeleteProjectInvite(ctx context.Context, projectID, inviteID string) error {
+	res, err := db.ExecContext(ctx,
+		`DELETE FROM invites WHERE id = ? AND project_id = ? AND note_id IS NULL`,
+		inviteID, projectID)
+	if err != nil {
+		return err
+	}
+	if n, _ := res.RowsAffected(); n == 0 {
+		return ErrNotFound
+	}
+	return nil
+}
+
+// PendingProjectInvite reports whether this address already has a live invitation
+// to this project, so a second attempt can say so instead of sending another link.
+func (db *DB) PendingProjectInvite(ctx context.Context, projectID, email string) (bool, error) {
+	var n int
+	err := db.QueryRowContext(ctx, `
+		SELECT count(*) FROM invites
+		WHERE project_id = ? AND note_id IS NULL AND lower(email) = lower(?)
+		  AND accepted_at IS NULL AND expires_at > ?`,
+		projectID, email, time.Now().Unix()).Scan(&n)
+	return n > 0, err
+}
+
 // PendingNoteInvite reports whether this address already has a live invitation to
 // this note, so a second attempt can say so instead of sending a second link.
 func (db *DB) PendingNoteInvite(ctx context.Context, noteID, email string) (bool, error) {

web/e2e/smoke.spec.js

@@ -1104,7 +1104,9 @@ test('en rolle kan rettes uden at fjerne personen', async ({ browser, page }) =>
 
 	await projectAction(page, 'Del');
 	await page.getByLabel('Inviter via e-mail').fill('andreas@example.dk');
-	await page.getByLabel('Rolle').selectOption('viewer');
+	// `exact`, fordi siden nu også har "Rolle for den valgte" ved siden af
+	// vælgeren — og getByLabel matcher som understreng.
+	await page.getByLabel('Rolle', { exact: true }).selectOption('viewer');
 	await page.getByRole('button', { name: 'Inviter' }).click();
 	const link = await page.locator('.link-out code').textContent();
 
@@ -4515,3 +4517,121 @@ test('en indstilling kan findes ved at søge efter den', async ({ page }) => {
 
 	expect(trouble).toEqual([]);
 });
+
+/**
+ * Et projekt kan deles med en, der allerede er her.
+ *
+ * Indtil nu kunne det kun deles ved at stave en e-mailadresse — altså ved at kende
+ * adressen på en kollega, man kender navnet på og sidder i samme rum som. Konti på
+ * en instans bliver kun til ved invitation, så der er ikke noget at beskytte ved at
+ * lade være med at vise dem for hinanden; det er adressebogen, funktionen har brug
+ * for.
+ *
+ * Prøven laver selv sin anden person frem for at låne den fra prøven ovenfor. Den
+ * kobling så jeg først, da jeg kørte den her alene: basen tømmes for hver kørsel,
+ * så en prøve, der kun består, når hele filen kører i rækkefølge, består ikke af
+ * sine egne grunde.
+ *
+ * Og turen forbi invitationen er ikke spild. Den viser skiftet: den samme person er
+ * først en ventende adresse, og bagefter et navn, der kan vælges.
+ */
+test('et projekt kan deles med en, der allerede har en konto', async ({ browser, 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('Vinterhaven');
+	await sidebar.getByLabel('Projektnavn').press('Enter');
+	await expect(page.getByRole('heading', { name: 'Vinterhaven' })).toBeVisible();
+
+	// Først den, der ikke er her endnu. Adressen er den eneste vej til dem.
+	await projectAction(page, 'Del');
+	await page.getByLabel('Inviter via e-mail').fill('gartner@example.dk');
+	await page.getByRole('button', { name: 'Inviter' }).click();
+
+	// Og de bliver stående synligt, indtil de kommer — ellers er en invitation
+	// sendt i går usynlig, og så bliver den sendt igen.
+	const invited = page.locator('.members.invited');
+	await expect(invited.getByText('gartner@example.dk')).toBeVisible();
+	await expect(invited).toContainText('Inviteret, ikke kommet endnu');
+
+	const link = await page.locator('.link-out code').textContent();
+	expect(link).toContain('/invite?token=');
+
+	// Tom kontekst: en inviteret, der allerede er logget ind som den, der inviterede,
+	// er det ene tilfælde, der aldrig sker.
+	const context = await browser.newContext({ storageState: { cookies: [], origins: [] } });
+	const guest = await context.newPage();
+	await guest.goto(link);
+	await guest.getByLabel('Navn', { exact: true }).fill('Gartner');
+	await guest.getByLabel(/Adgangskode/).fill('et langt kodeord til test');
+	await guest.getByRole('button', { name: 'Opret konto' }).click();
+	await expect(guest.getByRole('navigation', { name: 'Hovedmenu' })).toBeVisible();
+	await context.close();
+
+	// Nu er de her. Et nyt projekt, og den samme person er blevet et navn, man vælger.
+	await page.goto('/');
+	await sidebar.getByRole('button', { name: 'Nyt projekt' }).click();
+	await sidebar.getByLabel('Projektnavn').fill('Drivhuset');
+	await sidebar.getByLabel('Projektnavn').press('Enter');
+	await expect(page.getByRole('heading', { name: 'Drivhuset' })).toBeVisible();
+
+	await projectAction(page, 'Del');
+	const picker = page.locator('.addshare select').first();
+	await expect(picker.locator('option', { hasText: 'Gartner' })).toHaveCount(1);
+
+	await picker.selectOption({ label: 'Gartner' });
+	await page.getByLabel('Rolle for den valgte').selectOption('viewer');
+	await page.locator('.addshare button', { hasText: 'Del' }).click();
+
+	const members = page.locator('.members').first();
+	await expect(members.locator('li', { hasText: 'Gartner' })).toContainText('Kan kun se');
+
+	// Og bagefter er de væk fra listen: en liste, der tilbyder at tilføje en, der
+	// allerede er der, er en liste, man gør det i ved et uheld.
+	await expect(picker.locator('option', { hasText: 'Gartner' })).toHaveCount(0);
+
+	// Tilbagetrækningen af en invitation prøves i Go
+	// (TestAPendingInviteIsVisibleAndCanBeWithdrawn) og ikke her. Den krævede et
+	// spring tilbage til det første projekt, og delingspanelet står åbent på tværs
+	// af det spring — så klikket på "Del" lukkede det, jeg lige havde åbnet.
+
+	// Og så den anden vej: hvad Gartner selv oplever. Man bliver lukket ind i et
+	// projekt uden at blive spurgt, så man skal i det mindste få det at vide og
+	// kunne gå ud igen uden at bede ejeren om lov.
+	const theirs = await browser.newContext({ storageState: { cookies: [], origins: [] } });
+	const gartner = await theirs.newPage();
+	const gartnerTrouble = watchForTrouble(gartner);
+	await gartner.goto('/');
+	await gartner.getByLabel('E-mail').fill('gartner@example.dk');
+	await gartner.getByLabel('Adgangskode').fill('et langt kodeord til test');
+	await gartner.getByRole('button', { name: 'Log ind' }).click();
+	await expect(gartner.getByRole('navigation', { name: 'Hovedmenu' })).toBeVisible();
+
+	await gartner.getByRole('button', { name: /Beskeder/ }).click();
+	const bell = gartner.getByRole('dialog', { name: 'Beskeder' });
+	await expect(bell.getByText('delte et projekt med dig')).toBeVisible();
+
+	// Beskeden fører hen til projektet. En besked, der ikke kan følges, er en
+	// oplysning om noget, man selv skal gå ud og finde.
+	await bell.locator('.row').filter({ hasText: 'delte et projekt med dig' }).click();
+	await expect(gartner.getByRole('heading', { name: 'Drivhuset' })).toBeVisible();
+
+	// Udgangen. Bekræftelsen siges ja til, ellers sker der intet.
+	gartner.on('dialog', (d) => d.accept());
+	await projectAction(gartner, /^Del/);
+	await gartner.getByRole('button', { name: 'Forlad projektet' }).click();
+
+	// Væk fra sidebjælken, og ikke længere til at åbne.
+	await expect(
+		gartner.getByRole('navigation', { name: 'Hovedmenu' }).getByRole('link', { name: /Drivhuset/ })
+	).toHaveCount(0);
+
+	// En 404 her er ikke uro: den er svaret på at bede om et projekt, man lige har
+	// forladt, og den er hele pointen med at have forladt det.
+	expect(gartnerTrouble.filter((t) => !t.includes('404'))).toEqual([]);
+	await theirs.close();
+
+	expect(trouble).toEqual([]);
+});

web/src/lib/api.js

@@ -338,7 +338,11 @@ export const api = {
 	reorderSections: (projectId, ids) => post(`/projects/${projectId}/sections/reorder`, { ids }),
 
 	listMembers: (projectId) => get(`/projects/${projectId}/members`),
-	invite: (projectId, email, role) => post(`/projects/${projectId}/invites`, { email, role }),
+	// Én vej ind, to måder at sige hvem: et id, man har peget på, eller en adresse,
+	// man har skrevet. Serveren slår adressen op og ender det samme sted, hvis den
+	// hører til en konto her.
+	invite: (projectId, who, role) => post(`/projects/${projectId}/invites`, { ...who, role }),
+	withdrawInvite: (projectId, inviteId) => del(`/projects/${projectId}/invites/${inviteId}`),
 	setMemberRole: (projectId, userId, role) =>
 		patch(`/projects/${projectId}/members/${userId}`, { role }),
 	removeMember: (projectId, userId) => del(`/projects/${projectId}/members/${userId}`),

web/src/lib/components/Notifications.svelte

@@ -24,6 +24,7 @@
 		assigned: 'notif.assigned',
 		'note.changed': 'notif.noteChanged',
 		'note.shared': 'notif.noteShared',
+		'project.shared': 'notif.projectShared',
 		'note.mention': 'notif.mention',
 		'daily.plan': 'notif.dailyPlan',
 		'update.available': 'notif.update',

web/src/lib/locales/da.js

@@ -31,6 +31,7 @@ export const da = {
 	'notif.assigned': '{name} gav dig en opgave',
 	'notif.noteChanged': '{name} rettede en note',
 	'notif.noteShared': '{name} delte en note med dig',
+	'notif.projectShared': '{name} delte et projekt med dig',
 	'notif.mention': '{name} nævnte dig i en note',
 	'notif.dailyPlan': 'Dagens plan',
 	'notif.update': 'Der er kommet en ny version',
@@ -908,6 +909,14 @@ export const da = {
 	'project.canEdit': 'Kan redigere',
 	'project.canView': 'Kan kun se',
 	'project.invite': 'Inviter',
+	'project.pickPerson': 'Vælg en person…',
+	'project.leave': 'Forlad projektet',
+	'project.leaveSure': 'Forlad {name}? Du mister adgangen, og kun ejeren kan lukke dig ind igen.',
+	'project.roleForPicked': 'Rolle for den valgte',
+	'project.shareWith': 'Del',
+	'project.orByEmail': 'Eller en, der ikke er her endnu:',
+	'project.invited': 'Inviteret, ikke kommet endnu',
+	'project.withdrawInvite': 'Træk invitationen til {email} tilbage',
 	'project.inviteByEmail': 'Inviter via e-mail',
 	'project.emailAddress': 'e-mailadresse',
 	'project.role': 'Rolle',

web/src/lib/locales/en.js

@@ -28,6 +28,7 @@ export const en = {
 	'notif.assigned': '{name} gave you a task',
 	'notif.noteChanged': '{name} edited a note',
 	'notif.noteShared': '{name} shared a note with you',
+	'notif.projectShared': '{name} shared a project with you',
 	'notif.mention': '{name} mentioned you in a note',
 	'notif.dailyPlan': "Today's plan",
 	'notif.update': 'A new version is out',
@@ -902,6 +903,14 @@ export const en = {
 	'project.canEdit': 'Can edit',
 	'project.canView': 'Can only view',
 	'project.invite': 'Invite',
+	'project.pickPerson': 'Pick somebody…',
+	'project.leave': 'Leave the project',
+	'project.leaveSure': 'Leave {name}? You lose access, and only its owner can let you back in.',
+	'project.roleForPicked': 'Role for the person picked',
+	'project.shareWith': 'Share',
+	'project.orByEmail': 'Or somebody who is not here yet:',
+	'project.invited': 'Invited, not arrived yet',
+	'project.withdrawInvite': 'Withdraw the invitation to {email}',
 	'project.inviteByEmail': 'Invite by email',
 	'project.emailAddress': 'email address',
 	'project.role': 'Role',

web/src/routes/projekt/[id]/+page.svelte

@@ -41,6 +41,13 @@
 	let inviteRole = $state('editor');
 	let inviteLink = $state('');
 	let inviteError = $state('');
+	// De to andre halvdele af delingspanelet: hvem der kan tilføjes, og hvem der er
+	// inviteret og ikke kommet endnu. Begge kommer fra det samme svar som
+	// medlemmerne, så panelet åbner færdigt i ét kald.
+	let candidates = $state([]);
+	let pending = $state([]);
+	let sharePick = $state('');
+	let pickRole = $state('editor');
 
 	let id = $derived($page.params.id);
 
@@ -101,7 +108,7 @@
 
 	$effect(() => {
 		if (showShare && project) {
-			api.listMembers(project.id).then((r) => (members = r.members));
+			api.listMembers(project.id).then(readMembers);
 		}
 	});
 
@@ -512,23 +519,61 @@
 		}
 	}
 
-	async function invite(event) {
+	// Ét sted at læse svaret, fordi der nu er tre lister i det og fire steder, der
-		event.preventDefault();
+	// henter det. Tre tildelinger skrevet fire gange er tre, der kan blive glemt.
+	function readMembers(r) {
+		members = r.members;
+		candidates = r.candidates ?? [];
+		pending = r.pending ?? [];
+	}
+
+	async function share(who, role) {
 		inviteError = '';
 		inviteLink = '';
 		try {
-			const result = await api.invite(project.id, inviteEmail, inviteRole);
+			const result = await api.invite(project.id, who, role);
-			inviteEmail = '';
 			if (result.link && !result.emailed) {
 				// No mail server, or delivery failed. The link is the only way this
 				// invite reaches anybody, so it is shown rather than swallowed.
 				inviteLink = result.link;
 			}
-			members = (await api.listMembers(project.id)).members;
+			readMembers(await api.listMembers(project.id));
 		} catch (e) {
 			inviteError = humanMessage(e);
 		}
 	}
+
+	async function invite(event) {
+		event.preventDefault();
+		const email = inviteEmail.trim();
+		if (!email) return;
+		await share({ email }, inviteRole);
+		if (!inviteError) inviteEmail = '';
+	}
+
+	// Udgangen. Man bliver lukket ind i et projekt uden at blive spurgt, så der skal
+	// være en vej ud, der ikke går gennem at bede ejeren om det.
+	async function leave() {
+		if (!confirm(t('project.leaveSure', { name: project.name }))) return;
+		try {
+			await api.removeMember(project.id, app.user.id);
+			// Væk fra en side, man ikke længere må se: bliver man stående, er det
+			// næste, siden gør, at hente den og få 404.
+			await goto('/');
+			await app.refreshProjects();
+		} catch (e) {
+			app.toast(humanMessage(e));
+		}
+	}
+
+	async function withdraw(invite) {
+		try {
+			await api.withdrawInvite(project.id, invite.id);
+			readMembers(await api.listMembers(project.id));
+		} catch (e) {
+			app.toast(humanMessage(e));
+		}
+	}
 </script>
 
 <!-- Wide for a board and a month grid, narrow for a list. Decided here rather than
@@ -765,7 +810,7 @@
 									class="remove"
 									onclick={async () => {
 										await api.removeMember(project.id, member.user_id);
-										members = (await api.listMembers(project.id)).members;
+										readMembers(await api.listMembers(project.id));
 									}}
 									aria-label={t('project.removeMember', { name: member.name })}>×</button
 								>
@@ -774,7 +819,66 @@
 					{/each}
 				</ul>
 
+				<!-- De inviterede står ved siden af medlemmerne. Uden dem er en invitation
+				     sendt i går usynlig: personen har ingen konto, så de er hverken
+				     medlem eller nogen, man kan vælge — og så bliver den sendt igen. -->
+				{#if pending.length}
+					<ul class="members invited">
+						{#each pending as invite (invite.id)}
+							<li>
+								<span class="avatar waiting">@</span>
+								<span class="member-name">{invite.email}</span>
+								<span class="role">{t('project.invited')}</span>
+								{#if isOwner}
+									<button
+										class="remove"
+										onclick={() => withdraw(invite)}
+										aria-label={t('project.withdrawInvite', { email: invite.email })}>×</button
+									>
+								{/if}
+							</li>
+						{/each}
+					</ul>
+				{/if}
+
+				<!-- Kun for dem, der er lukket ind. Ejeren kan ikke gå fra sit eget
+				     projekt — det ville være en overdragelse, ikke en udgang. -->
+				{#if !isOwner}
+					<button class="leave" onclick={leave}>{t('project.leave')}</button>
+				{/if}
+
 				{#if isOwner}
+					<!-- Den, der allerede er her, vælges. Indtil nu kunne et projekt kun
+					     deles ved at stave en e-mailadresse, altså ved at kende adressen på
+					     en kollega, man kender navnet på — og konti her bliver kun til ved
+					     invitation, så listen er en adressebog og ikke en udlevering. -->
+					{#if candidates.length}
+						<div class="addshare">
+							<select bind:value={sharePick} aria-label={t('project.pickPerson')}>
+								<option value="">{t('project.pickPerson')}</option>
+								{#each candidates as person (person.id)}
+									<option value={person.id}>{person.name}</option>
+								{/each}
+							</select>
+							<select bind:value={pickRole} aria-label={t('project.roleForPicked')}>
+								<option value="editor">{t('project.canEdit')}</option>
+								<option value="viewer">{t('project.canView')}</option>
+							</select>
+							<button
+								disabled={!sharePick}
+								onclick={async () => {
+									const id = sharePick;
+									sharePick = '';
+									await share({ user_id: id }, pickRole);
+								}}>{t('project.shareWith')}</button
+							>
+						</div>
+					{/if}
+
+					<!-- Og den, der ikke er her endnu. Samme felt til begge udfald: har
+					     adressen en konto, bliver det en deling med det samme, og ellers en
+					     invitation. Hvem der har en konto, skal man ikke vide for at dele. -->
+					<p class="byemail-hint">{t('project.orByEmail')}</p>
 					<form onsubmit={invite}>
 						<input
 							bind:value={inviteEmail}
@@ -1396,6 +1500,45 @@
 		font-size: var(--text-sm);
 	}
 
+	/* De inviterede står under medlemmerne med en tynd streg imellem: de er på vej
+	   ind, ikke inde, og en liste uden skel læses som om de allerede var det. */
+	.invited {
+		border-top: 1px solid var(--line);
+		padding-top: var(--s2);
+	}
+
+	/* Ingen farve at give dem: en invitation har en adresse og ellers ingenting,
+	   og en tilfældig farve ville love et menneske, der ikke findes endnu. */
+	.avatar.waiting {
+		background: var(--surface-sunken);
+		border: 1px dashed var(--line);
+		color: var(--ink-muted);
+	}
+
+	.addshare {
+		display: flex;
+		gap: var(--s2);
+		align-items: center;
+		flex-wrap: wrap;
+	}
+
+	/* I fareskrift og alene: det er den eneste knap i panelet, der handler om en
+	   selv, og den skal ikke kunne forveksles med at fjerne en anden. */
+	.leave {
+		align-self: flex-start;
+		padding: var(--s2) var(--s3);
+		border: 1px solid var(--danger);
+		border-radius: var(--radius);
+		color: var(--danger);
+		font-size: var(--text-sm);
+	}
+
+	.byemail-hint {
+		margin: 0;
+		font-size: var(--text-xs);
+		color: var(--ink-muted);
+	}
+
 	.avatar {
 		width: 22px;
 		height: 22px;