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>

frontend/src/components/RestaurantList.tsx

@@ -37,6 +37,18 @@ export default function RestaurantList({
             {r.region && <span>{r.region}</span>}
             {r.price_range && <span>{r.price_range}</span>}
           </div>
+          {r.channels && r.channels.length > 0 && (
+            <div className="flex flex-wrap gap-1 mt-1">
+              {r.channels.map((ch) => (
+                <span
+                  key={ch}
+                  className="px-1.5 py-0.5 bg-red-50 text-red-600 rounded text-[10px] font-medium"
+                >
+                  {ch}
+                </span>
+              ))}
+            </div>
+          )}
         </button>
       ))}
     </div>