feat: runtime config, Matomo analytics, chat accounts, DM history/search, and Prometheus retention

.github/instructions/TODO.md

@@ -4,36 +4,9 @@
 
 ## Enhancements
 
-### Application configuration
+### Release new version 1.0.13
 
-- [ ] Configuration: create simple getter/setter for configuration values (e.g. `MATOMO_URL`, `MATOMO_SITE_ID`) in `backend/admin/config.go`
-- [ ] Configuration: expose configuration values to frontend via `/api/admin/config` endpoint
-- [ ] Configuration: make configuration values editable:
-  - [ ] HLS_SEGMENT_DURATION
-  - [ ] HLS_WINDOW_SIZE
-  - [ ] MATOMO_URL
-  - [ ] MATOMO_SITE_ID
-
-### Admin frontend
-
-- [ ] Playlist: show `needs_normalization` badge and block/queue playlist-add until `ready`
-- [ ] Playlist: show `ready` badge and allow playlist-add when `ready`
-- [ ] Extend `system.html` with a section for configuration settings on top of page (HLS segment duration, window size, Matomo URL/site ID)
-- [ ] Add functions to `admin.ts` to call `/api/admin/config` for getting and updating configuration values
-
-### User frontend
-
-- [ ] Player frontend: Embed JavaScript snippet in `index.html` to send pageview events to Matomo
-
-### Chat user features
-
-- [ ] Chat: add user registration and login flows
-- [ ] Chat: private DM history and search
-- [ ] Chat UI: add login/logout button, show username in chat, show/toggle user list, show/toggle online status, show typing indicator
-
-### Monitoring
-
-- [ ] Prometheus TSDB retention policy: delete metrics older than 30d
+- [ ] Follow the [release procedure](/CONTRIBUTING.md#full-release-procedure) to release a new version of the software, including updating `CHANGELOG.md`, tagging the release in Git, and creating a Gitea release with notes.
 
 ## Setup phases remaining