feat(gallery): add quick Like/Favorite actions on thumbnails across layouts

- Grid, Masonry, Mosaic, Timeline, Hero, and Carousel layouts now expose inline Like/Favorite buttons when feedback is enabled
- Respect requireNameEmail; prompt via identity modal before submitting feedback
- Wire feedback settings from GalleryView -> layouts via feedbackOptions

feat(lightbox): keep feedback usable while navigating

- Add initialShowFeedback prop; preserve panel state across navigation
- Offset Next button when feedback panel is open so it remains accessible
- Hide/avoid overlapping nav on small screens

Refs: #19

frontend/src/components/gallery/layouts/BaseGalleryLayout.tsx

@@ -17,8 +17,15 @@ export interface BaseGalleryLayoutProps {
   protectionLevel?: 'basic' | 'standard' | 'enhanced' | 'maximum';
   useEnhancedProtection?: boolean;
   feedbackEnabled?: boolean;
+  feedbackOptions?: {
+    allowLikes?: boolean;
+    allowFavorites?: boolean;
+    allowRatings?: boolean;
+    allowComments?: boolean;
+    requireNameEmail?: boolean;
+  };
 }
 
 export abstract class BaseGalleryLayout<T extends BaseGalleryLayoutProps = BaseGalleryLayoutProps> extends React.Component<T> {
   abstract render(): React.ReactNode;
-}
+}