Per-user "I've done this" toggle alongside hearts and bookmarks.
Hearts express approval; gjort expresses completion. Both contribute
to public statistics so readers can see what people LIKE versus what
people actually DO.
Backend:
- New activity_done table (composite PK on activity_id + user_id,
CASCADE on both refs, mirrors activity_hearts).
- POST/DELETE /api/activities/:id/done. Unlike heart/bookmark, "gjort"
works on every visibility the viewer can see — private (owner-only,
acts as a personal todo checkbox), friends-only (mutual-friend +
no-block check, mirrors GET /:id), public, semi. Non-viewers get
404 to avoid leaking existence.
- buildBulkLookups + serialize extended with done_count + viewer_done
so the list endpoint stays at constant queries per render.
- Public-list endpoint (server/users.ts) bulk-fetches done counts
alongside heart counts; viewer_done is always false (unauth view).
Types: Activity{Public,Semi,Private,Friends} all gain done_count +
viewer_done. Private's count is at most 1 (only the owner can write).
UI: new "✓ Gjort" / "☐ Gjort" button in the action row with the same
optimistic-toggle + localOverride pattern as hearts. Anonymous viewers
on public activities see a muted "✓ N" stat. Title hint clarifies
the intent: "Dette har jeg gjort" vs "Du har gjort dette."
Tests: 2 new in engagement.test.ts — toggle + idempotency on public,
owner-only access on private (non-owner gets 404).
Ole-Morten Duesund
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