Fase 6: deploy readiness (PWA + invitation rate-limit + JWT rotation)

Closes the deferrals from Fase 4 that gated a public deploy of the MVP.

PWA install
- Custom SW at apps/web/src/sw.ts (named sw.ts, not service-worker.ts, so
  SvelteKit doesn't intercept it and block Workbox imports).
- vite.config.ts switched to injectManifest strategy with precache of the
  built shell; no runtime caching of Supabase (offline writes stay on the
  existing $lib/sync pending_ops queue).
- Root +layout.svelte onMount() calls registerSW({ immediate: true }) from
  virtual:pwa-register — the plugin does not auto-register.
- Web manifest with 192/512/512-maskable icons + iOS meta tags
  (apple-mobile-web-app-capable, apple-touch-icon, etc.) in app.html.
- Placeholder icons generated via ImageMagick; replace before public launch
  (noted in apps/web/static/icons/README.md).

Kong rate-limit
- /rest/v1/collective_invitations POST: 20/hour per Authorization header.
  Anti-spam on invitation creation is the only rate-limit that survived —
  auth rate-limits were dropped during execution (see plan §6.3): Keycloak
  already provides bruteForceProtected=true on the realm, and stacking a
  Kong limit on /auth/v1/token throttled legitimate PKCE code exchanges
  during E2E.
- Added 'rate-limiting' to KONG_PLUGINS in docker-compose.dev.yml.
- Discovered: strip_path=true on a full-table path sends "/" upstream and
  PostgREST rejects POST to root with PGRST117. Route carries a
  request-transformer plugin that rewrites the URI back.

JWT rotation + prod template
- infra/scripts/rotate-jwt.sh signs anon + service_role JWTs with a fresh
  48-byte secret via openssl. Prints three values for the operator to
  paste; does not touch files.
- Dev secret rotated as a dry-run. Updated both .env (local, gitignored)
  and apps/web/.env.development. Existing sessions are invalidated — all
  users must re-login once.
- .env.production.example committed with placeholders + rotation notes.

Lighthouse + RLS audit tooling
- `just lighthouse` boots the prod build + Supabase stack and runs
  lighthouse CLI against PWA/A11y/Best-Practices.
- `just rls-audit` runs infra/scripts/rls-audit.sh which signs an Eva JWT
  (non-member) and GETs 8 REST endpoints — all must return []. Complements
  the Vitest rls-audit.test.ts suite.

Tests
- 236 green: 34 pgTAP + 140 Vitest integration + 15 unit + 46 Playwright.
- 1 rate-limit test gated behind RUN_RATE_LIMIT_TESTS=1 (Kong counters are
  shared state); run via `just test-rate-limit` which force-recreates Kong
  first to reset counters.
- 3 skipped in `just test-all` (2 Realtime presence upstream bug, 1 gated
  rate-limit).

Deliberately out of scope: push notifications, CI ephemeral Docker, final
production icons, runtime caching of Supabase (SyncBanner + pending_ops
already covers offline).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/vite.config.ts

@@ -11,11 +11,14 @@ export default defineConfig({
 		}),
 		sveltekit(),
 		SvelteKitPWA({
-			// strategies defaults to 'generateSW' — the plugin auto-generates the service
-			// worker. We do NOT use 'injectManifest' here because SvelteKit's own Vite
-			// plugin intercepts src/service-worker.ts and blocks external imports (Workbox).
-			// In Fase 2b we will introduce a custom SW as src/sw.ts (a filename SvelteKit
-			// does not recognise as a service worker) and switch to injectManifest then.
+			// Fase 6.1: custom SW at src/sw.ts (NOT src/service-worker.ts — SvelteKit
+			// intercepts that filename and blocks Workbox imports; see gotcha #10
+			// in CLAUDE.md). Minimal strategy: precache the built shell, no runtime
+			// caching of Supabase. The $lib/sync pending_ops queue already handles
+			// offline writes; SyncBanner surfaces offline state to the user.
+			strategies: 'injectManifest',
+			srcDir: 'src',
+			filename: 'sw.ts',
 			scope: '/',
 			base: '/',
 			manifest: {
@@ -31,10 +34,10 @@ export default defineConfig({
 				icons: [
 					{ src: '/icons/icon-192.png', sizes: '192x192', type: 'image/png' },
 					{ src: '/icons/icon-512.png', sizes: '512x512', type: 'image/png' },
-					{ src: '/icons/icon-512.png', sizes: '512x512', type: 'image/png', purpose: 'maskable' }
+					{ src: '/icons/icon-512-maskable.png', sizes: '512x512', type: 'image/png', purpose: 'maskable' }
 				]
 			},
-			workbox: {
+			injectManifest: {
 				globPatterns: ['client/**/*.{js,css,ico,png,svg,webp,woff,woff2}']
 			},
 			devOptions: {