Enhance email templates with clickable links, branding, and improved styling

- Add clickable gallery links in all email templates
- Include application logo in email header and footer (custom or PicPeak default)
- Redesign emails with professional styling matching gallery login page
  - Gray background with white content box
  - PicPeak green header with centered logo
  - Clean typography and proper spacing
  - Responsive design for mobile devices
  - Styled call-to-action buttons
  - Footer with branding and copyright
- Update email processor to fetch branding settings dynamically
- Use proper API URLs for logo images in emails

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

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

frontend/src/contexts/ThemeContext.tsx

@@ -170,13 +170,17 @@ export const ThemeProvider: React.FC<ThemeProviderProps> = ({
     }
   }, []);
 
-  // Save theme to localStorage when it changes
+  // Save theme to localStorage when it changes (but not in gallery views)
   useEffect(() => {
-    // Only save if theme has actually changed
-    const currentSaved = localStorage.getItem('gallery-theme');
-    const newValue = JSON.stringify({ name: themeName, config: theme });
-    if (currentSaved !== newValue) {
-      localStorage.setItem('gallery-theme', newValue);
+    // Don't save theme in gallery views to avoid conflicts
+    const isGalleryView = window.location.pathname.includes('/gallery/');
+    if (!isGalleryView) {
+      // Only save if theme has actually changed
+      const currentSaved = localStorage.getItem('gallery-theme');
+      const newValue = JSON.stringify({ name: themeName, config: theme });
+      if (currentSaved !== newValue) {
+        localStorage.setItem('gallery-theme', newValue);
+      }
     }
   }, [theme, themeName]);