- Create apps/api/src/routes/push.ts: GET /vapid-public-key, POST /subscription (upsert), DELETE /subscription (user-scoped)
- Wire pushRouter at /api/push in index.ts
- Call webpush.setVapidDetails() in isMainModule() guard before serve()
- Fix broken vi.getMockImplementation scaffold bug in push.test.ts (Rule 1)
- push.test.ts: all 4 tests GREEN
- tests/fixtures/vapid.ts: static TEST_VAPID keypair for offline unit tests
- tests/lib/pushDispatcher.test.ts: RED — 410/404 prune + 201/5xx no-delete
- tests/lib/pushCoalescer.test.ts: RED — burst coalesce fires once with count=N; excludeUserId
- tests/broker/reminderScheduler.test.ts: RED — shared+timed filter; dedup by (uid,minuteBucket)
- tests/lib/eventChangeDispatcher.test.ts: RED — create/meaningful-update fires; description-only silent; actor excluded
- tests/routes/push.test.ts: RED — POST 201/401; DELETE removes rows; GET vapid-public-key
- test/setup.ts: import pushSubscriptions + add db.delete(pushSubscriptions) in afterEach
- all 5 RED files fail on missing-module (correct; implementations in Plans 05-02..05-06)