feat: add automation, reminders, notifications, msg search, session export, image analysis, host exec, PWA, Docker, E2E, CI/CD

- Automation: rules CRUD (in-memory store + API)
- Reminders: CRUD (in-memory store + API)
- Notifications: push interface for future push server
- Message search: API endpoint with DB-backed query
- Session export: /sessions/:id/export → Markdown
- Image analysis: API stub for multimodal LLM
- Host exec: API stub for Docker sandbox
- PWA: manifest.json + service worker
- Docker: Dockerfile + docker-compose.yml
- E2E: Playwright test scaffold
- CI/CD: GitHub Actions workflow (go test + tsc)

.github/workflows/ci.yml

@@ -0,0 +1,32 @@
+name: Cyrene CI
+on: [push, pull_request]
+jobs:
+  backend:
+    runs-on: ubuntu-latest
+    services:
+      postgres:
+        image: pgvector/pgvector:pg16
+        env: {POSTGRES_USER: cyrene, POSTGRES_PASSWORD: cyrene_pass, POSTGRES_DB: cyrene_ai}
+        ports: [5432:5432]
+        options: >-
+          --health-cmd pg_isready --health-interval 10s --health-timeout 3s --health-retries 5
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with: {go-version: '1.26'}
+      - run: go test ./...
+        working-directory: backend
+        env: {POSTGRES_HOST: localhost, POSTGRES_PORT: "5432", POSTGRES_USER: cyrene, POSTGRES_PASSWORD: cyrene_pass, POSTGRES_DB: cyrene_ai, LLM_API_KEY: skip, JWT_SECRET: test-secret-32bytes-minimum!!, ADMIN_PASSWORD: test12345}
+
+  frontend:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with: {node-version: '22'}
+      - run: npm ci
+        working-directory: frontend/web
+      - run: npx tsc --noEmit
+        working-directory: frontend/web
+      - run: npm run build
+        working-directory: frontend/web