feat: add Apple Liquid Glass templates, image security settings, and automated releases

## New Features
- Apple Liquid Glass CSS template with iOS 26-inspired design
- Liquid Glass Dark theme with neon accents
- Image Security settings tab with per-event protection levels
- Release Please automation for versioning and changelog

## Improvements
- Update CSS template migration with final working templates
- Add search placeholder visibility fix for glass themes
- Update README roadmap (Download Protection, Gallery Templates, Filtering & Export now implemented)

## Infrastructure
- Add release-please.yml workflow for automated releases
- Add release-please-config.json and manifest
- Update docker-build.yml with Release Please integration comments
- Add comprehensive CHANGELOG.md

## Cleanup
- Add working/planning docs to .gitignore (CLAUDE.md, test-*.md, feature-*.md, etc.)
- Remove internal planning documents from git tracking (kept locally)

## Files Added
- .github/workflows/release-please.yml
- .release-please-manifest.json
- release-please-config.json
- CHANGELOG.md
- frontend/src/features/settings/tabs/ImageSecurityTab.tsx

backend/src/routes/adminImageSecurity.js

@@ -31,13 +31,15 @@ router.get('/settings', adminAuth, async (req, res) => {
 
     const config = {};
     settings.forEach(setting => {
-      config[setting.setting_key] = JSON.parse(setting.setting_value);
+      // PostgreSQL JSON columns are already parsed by the driver
+      // Just use the value directly - no need to JSON.parse
+      config[setting.setting_key] = setting.setting_value;
     });
 
     res.json(config);
   } catch (error) {
-    logger.error('Error getting image security settings', { error: error.message });
-    res.status(500).json({ error: 'Failed to get security settings' });
+    logger.error('Error getting image security settings', { error: error.message, stack: error.stack });
+    res.status(500).json({ error: 'Failed to get security settings', details: error.message });
   }
 });