docs(phase6): documentation site, landing page and open-source scaffolding

Material for MkDocs under docs/, covering self-hosting, the Rune, the
quick-add and filter languages, importing from Todoist, CalDAV,
mail-to-task, MCP, the AI layer and the API. The version is pinned: the
maintainers have announced that MkDocs 2.0 removes the plugin system
with no migration path, and an unpinned install would break this build
on the day it lands.

The landing page shows the quick-add parser as actual text rather than a
screenshot of it — that is the thing worth showing, and it reads better
as the real thing. It shares the app's design tokens, so the site and
what it describes look like one project.

MIT licence, contributing guide, security policy and issue templates.
Pages deployment is behind workflow_dispatch, so the docs build on every
push but nothing is published until the owner chooses to.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

README.md

@@ -13,8 +13,10 @@ Which is what a to-do list is.
 
 ## Status
 
-Early. The foundation is built and tested; the API and web interface are being
-written. See [What works today](#what-works-today).
+All six phases are built. See [What works today](#what-works-today) for what is
+tested and what is not.
+
+Documentation: [`docs/`](docs/), built with Material for MkDocs.
 
 ## Why this exists
 
@@ -40,10 +42,10 @@ mail-to-task address, and an MCP endpoint so Claude can work your task list dire
 
 ## What works today
 
-**Phases 1 and 3 are complete; phase 2 is most of the way there.** You can install
-it, create an account, add tasks by typing a sentence, share a project, watch
-somebody else's changes appear live, set up repeating chores and reminders, save
-filters, and subscribe to it from Apple Calendar.
+**Every phase in the plan is built.** You can install it, add tasks by typing a
+sentence, share projects, watch somebody else's changes appear live, set repeating
+chores and reminders, save filters, import your Todoist account, sync two-way with
+Apple Reminders, forward mail into it, and add it to Claude as a connector.
 
 | Area | State |
 |---|---|
@@ -64,10 +66,20 @@ filters, and subscribe to it from Apple Calendar.
 | ICS calendar feed, task durations | Done, tested |
 | Project templates | Done, tested |
 | Nightly backups with rotation | Done, tested |
-| Import/export, CalDAV, mail-to-task, Gmail, MCP, AI | Planned — phases 4–5 |
+| Comments, attachments, notifications, Web Push | Built |
+| Todoist CSV import and export, account export | Done, tested |
+| MCP server for Claude | Done, tested |
+| CalDAV server (two-way VTODO) | Done, tested |
+| Mail-to-task | Done, tested |
+| AI layer (Anthropic/OpenAI/Google/local) | Built, degrades when unconfigured |
+| Gmail settings | Partial — see below |
+| Documentation, landing page, licence | Done |
 
-Not yet built: comments and attachments, Web Push, and everything from phase 4
-onwards.
+**Not finished:** the Gmail integration stores its settings but has no OAuth2 flow
+yet, so it cannot actually connect. Web Push and the AI providers are implemented
+but have only been exercised against their specs, not against live services. And
+the interface does not yet expose comments, attachments, reminders, templates,
+import/export or the settings pages — all of it works through the API.
 
 Search finds `grøn` when you type `gron`, because Unicode does not consider `ø` an
 accented `o` and a Danish-first app that cannot do this is broken for its own users.
@@ -154,13 +166,14 @@ is part of it.
 1. **MVP** — auth, projects, sections, tasks, sub-tasks, priorities, due dates,
    quick add, Today and Upcoming, search, keyboard shortcuts. *(done)*
 2. **Sharing** — invites, roles, assignees, comments, attachments, activity log,
-   realtime sync, notifications.
+   realtime sync, notifications. *(done)*
 3. **Pro parity** — recurring tasks, reminders, filter queries, board and calendar
    views, durations, ICS feeds, templates, automatic backups. *(done)*
-4. **Import/export** — Todoist CSV and official export in, CSV/JSON/ICS out.
+4. **Import/export** — Todoist CSV and official export in, CSV/JSON/ICS out. *(done)*
 5. **Integrations** — CalDAV server, mail-to-task, Gmail, MCP server for Claude,
-   and a provider-agnostic AI layer that also talks to a local model.
-6. **Publication** — documentation, landing page, open-source scaffolding.
+   and a provider-agnostic AI layer that also talks to a local model. *(done,
+   except Gmail's OAuth flow)*
+6. **Publication** — documentation, landing page, open-source scaffolding. *(done)*
 
 ## Development
 
@@ -199,4 +212,4 @@ protocol of its own — CalDAV and the REST API *are* the sync.
 
 ## License
 
-Not yet chosen. MIT is the intention when this is published.
+[MIT](LICENSE). See [CONTRIBUTING.md](CONTRIBUTING.md) and [SECURITY.md](SECURITY.md).