Add transactional emails (SMTP) and planner features (no-go areas, notes, crash recovery)

Transactional emails:
- Add nodemailer SMTP email module with dev-mode console logging
- Magic link template and welcome template with HTML + plain text
- Wire sendMagicLink into login flow, sendWelcome into registration
- Update privacy page and deploy docs for SMTP configuration

Planner features:
- No-go areas: draw polygons on map (leaflet-geoman), synced via Yjs,
  passed to BRouter as nogos parameter, route recomputes on change
- Session notes: collaborative Y.Text textarea in sidebar tab
- Crash recovery: periodic localStorage save of Yjs state, restore on reconnect
- Rate limit session creation (10/IP/hour) in /new route

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

apps/journal/package.json

@@ -26,6 +26,7 @@
     "drizzle-orm": "catalog:",
     "isbot": "^5.1.0",
     "jose": "^6.2.2",
+    "nodemailer": "^8.0.4",
     "react": "catalog:",
     "react-dom": "catalog:",
     "react-router": "catalog:"
@@ -34,6 +35,7 @@
     "@react-router/dev": "catalog:",
     "@simplewebauthn/types": "^12.0.0",
     "@tailwindcss/vite": "catalog:",
+    "@types/nodemailer": "^7.0.11",
     "@types/react": "catalog:",
     "@types/react-dom": "catalog:",
     "tailwindcss": "catalog:",