GemeindePortal: Full implementation with Apple HIG redesign

- Landing page with large CTAs and seasonal banner
- Multi-step Pool booking wizard with progress bar
- Animated confirmation modals with calendar save
- Wasserzähler flow with large number input and live consumption
- Admin dashboard with today-stats, CSV export, click-to-call
- BookingCalendar with skeleton loading and 44px touch targets
- Cloudflare Turnstile CAPTCHA on pool form
- Supabase auth, RLS, and API routes
- Inline form validation, sticky submit buttons
- Mobile-first responsive design throughout

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

package.json

@@ -8,9 +8,12 @@
     "start": "next start"
   },
   "dependencies": {
+    "@supabase/ssr": "^0.9.0",
+    "@supabase/supabase-js": "^2.98.0",
     "next": "16.1.6",
     "react": "19.2.3",
-    "react-dom": "19.2.3"
+    "react-dom": "19.2.3",
+    "resend": "^6.9.3"
   },
   "devDependencies": {
     "@tailwindcss/postcss": "^4",