Add admin features, responsive UI, user reviews, visit stats, and channel-colored markers

- Admin: video management with Google Maps match status, manual restaurant mapping, restaurant remap on name change
- Admin: user management tab with favorites/reviews detail
- Admin: channel deletion fix for IDs with slashes
- Frontend: responsive mobile layout (map top, list bottom, 2-row header)
- Frontend: channel-colored map markers with legend
- Frontend: my reviews list, favorites toggle, visit counter overlay
- Frontend: force light mode for dark theme devices
- Backend: visit tracking (site_visits table), user reviews endpoint
- Backend: bulk transcript/extract streaming, geocode key fixes
- Nginx config for production deployment

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

nginx.conf

@@ -0,0 +1,47 @@
+server {
+    listen 80;
+    server_name www.tasteby.net tasteby.net;
+    return 301 https://www.tasteby.net$request_uri;
+}
+
+server {
+    listen 443 ssl http2;
+    server_name tasteby.net;
+
+    ssl_certificate     /etc/letsencrypt/live/www.tasteby.net/fullchain.pem;
+    ssl_certificate_key /etc/letsencrypt/live/www.tasteby.net/privkey.pem;
+
+    return 301 https://www.tasteby.net$request_uri;
+}
+
+server {
+    listen 443 ssl http2;
+    server_name www.tasteby.net;
+
+    ssl_certificate     /etc/letsencrypt/live/www.tasteby.net/fullchain.pem;
+    ssl_certificate_key /etc/letsencrypt/live/www.tasteby.net/privkey.pem;
+    ssl_protocols       TLSv1.2 TLSv1.3;
+    ssl_ciphers         HIGH:!aNULL:!MD5;
+
+    # Frontend (Next.js)
+    location / {
+        proxy_pass http://127.0.0.1:3001;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+    }
+
+    # Backend API (FastAPI)
+    location /api/ {
+        proxy_pass http://127.0.0.1:8000;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+}