Address the review of PR #176 (Feature 21, task 96e2dc3f):
- MQ-176-01: useUpdates drops its list as soon as the sheet closes
(gcTime 0), so each opening reads GET /api/v1/updates afresh and only
marks seen through the newest of that read, never a cached list.
- MQ-176-02: parseUpdate checks each url with appPath from
push/notification.ts, by parsed origin, instead of a prefix check that
tabs and newlines got past; the url kept is the path as parsed.
- MQ-176-03: TestMarkUpdatesSeen asserts updated_at is kept and settings
subscribers are not told.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
