New watches table (polymorphic target, unique per user+target; page purge
removes its rows via the trash service, and the list endpoint drops
targets the user can no longer read). Endpoints: idempotent PUT/DELETE
/watches/{page|pond}/:id gated by read access (404 hides the target),
GET state for the header toggles, and GET /users/me/watches resolving
names and links. Auto-watch hooks: creating a page and commenting
subscribe the actor, each behind a new user preference
(autoWatchOwnPages / autoWatchOnComment, default on) editable via the
profile PATCH and surfaced as checkboxes in the settings. UI: watch
toggle on the page header and the pond settings header, watch list with
unwatch in the account settings; new watches i18n namespace (de+en).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EwZ4jR4KFAPvpjWevfUGX1
