Task #554. Adds a full Web Push stack on top of the existing Socket.IO
notification fan-out so the iPad PWA (and any installed browser) receives
system notifications when Tx OS is closed or backgrounded.
Backend
- New `push_subscriptions` table (userId + unique endpoint + p256dh/auth
keys + ua + timestamps), exported from `@workspace/db`.
- `artifacts/api-server/src/lib/push.ts`:
- VAPID bootstrap from env, else cached file at LOCAL_STORAGE_ROOT (Docker
volume) with /tmp fallback for Replit dev, else ephemeral in-memory.
- `sendPushToUser()` honours `notificationsMuted` + per-channel prefs
(orders/meetings/notes), prunes 404/410 endpoints, truncates payload
bodies to ~3500 bytes so over-sized notes don't kill delivery.
- `upsertSubscription()` deletes a stale row first when the same
browser endpoint flips to a different user (account switch on shared
device) so the previous user's notifications can't leak.
- Three new routes: `GET /api/push/vapid-public-key`, `POST /api/push/subscribe`,
`POST /api/push/unsubscribe` (auth-gated, Zod-validated).
- Push hooked into the 4 existing emit sites: service-orders `notifyUser`,
notes new-note + reply, executive-meeting broadcast.
Frontend
- `artifacts/tx-os/public/sw.js`: push + notificationclick handlers only
(no asset caching). Focuses an existing tab or opens a new one at the
payload URL.
- SW registration in `main.tsx` scoped to `BASE_URL`.
- `use-push-subscription` hook (enable/disable/refresh + status:
unsupported / denied / default / subscribed).
- New `PushToggleRow` in `NotificationSettingsContent` with ar/en strings
(notifSettings.push.*). iPad copy explains that the user must add to
Home Screen first for iOS to allow Web Push.
Plumbing
- OpenAPI: 3 new operations under `notifications` tag; orval codegen run.
- `docker-compose.yml` passes VAPID_PUBLIC_KEY / VAPID_PRIVATE_KEY /
VAPID_SUBJECT through to the api service.
- `pnpm --filter @workspace/db run push` applied the schema.
- web-push + @types/web-push installed in api-server.
Verification
- API restarts clean; `/api/push/vapid-public-key` returns the generated
key; subscribe endpoint 401s without auth as expected.
- Architect review surfaced two HIGH issues (account-switch leak,
payload size); both fixed before completion.
riyadhafraa