fix: handle both share_link formats in gallery token verification

- Support both full URL and token-only formats in share_link column
- Fix gallery info endpoint to correctly validate share tokens
- Prevents "gallery not found" errors for valid share links

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

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

backend/src/routes/gallery.js

@@ -60,7 +60,11 @@ router.get('/:slug/info', async (req, res) => {
     
     // If token provided, verify it matches the share link
     if (token) {
-      const expectedToken = event.share_link.split('/').pop();
+      let expectedToken = event.share_link;
+      // Handle both formats: full URL or just token
+      if (event.share_link && event.share_link.includes('/')) {
+        expectedToken = event.share_link.split('/').pop();
+      }
       if (token !== expectedToken) {
         return res.status(404).json({ error: 'Invalid gallery link' });
       }