feat: implement feedback filter for liked/favorited photos (Issue #17)

Implemented Feature Request 1 from github.com/the-luap/picpeak/issues/17:
- Added filter functionality to display only liked or favorited photos
- Integrated feedback filter directly into PhotoFilterBar component
- Implemented responsive design with proper mobile/tablet/desktop layouts
- Filter only shows when feedback is enabled for the gallery
- Added proper count display for liked and favorited photos

Improvements:
- Fixed responsive breakpoints (mobile <768px, tablet 768-1023px, desktop ≥1024px)
- Feedback filter shows inline with categories on desktop with vertical divider
- On mobile/tablet, filter appears below categories to prevent layout issues
- Added horizontal scrolling for category buttons to prevent cut-off

Code cleanup:
- Removed all debug console.log statements from production code
- Removed test route from backend gallery.js
- Cleaned up unnecessary logging in frontend components

🤖 Generated with [Claude Code](https://claude.ai/code)

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

frontend/src/hooks/useGallery.ts

@@ -11,10 +11,10 @@ export const useGalleryInfo = (slug: string, token?: string) => {
   });
 };
 
-export const useGalleryPhotos = (slug: string, enabled: boolean = true) => {
+export const useGalleryPhotos = (slug: string, filter?: 'liked' | 'favorited' | 'all', guestId?: string, enabled: boolean = true) => {
   return useQuery({
-    queryKey: ['gallery-photos', slug],
-    queryFn: () => galleryService.getGalleryPhotos(slug),
+    queryKey: ['gallery-photos', slug, filter, guestId],
+    queryFn: () => galleryService.getGalleryPhotos(slug, filter, guestId),
     enabled,
     retry: 1,
     staleTime: 5 * 60 * 1000, // 5 minutes