Update v1.2.0-beta - Dynamic context menu & permissions

✨ New Features:
- Dynamic permission-based context menus for files and folders
- Support for collaborative folder access control
- Upload to specific folders including shared folders
- Changelog modal for version updates
- Improved dark mode synchronization

🐛 Bug Fixes:
- Fixed context menu displaying incorrect options
- Fixed CSS !important override preventing dynamic menu behavior
- Fixed folder collaboration permission checks
- Fixed breadcrumb navigation with empty segments
- Fixed "Premature close" error loop in attachments
- Fixed missing user variable in admin routes
- Fixed avatar loading COEP policy issues

🔒 Security:
- Added security middleware (CSRF, rate limiting, input validation)
- Fixed collaboration folder access validation
- Improved shared folder permission handling

🎨 UI/UX Improvements:
- Removed Actions column from folder view
- Context menu now properly hides/shows based on permissions
- Better visual feedback for collaborative folders
- Improved upload flow with inline modals

🧹 Code Quality:
- Added collaboration data to folder routes
- Refactored context menu logic for better maintainability
- Added debug logging for troubleshooting
- Improved file upload handling with chunking support

views/profile.ejs

@@ -592,12 +592,6 @@
     <div class="backdrop"></div>
     
     <div class="container">
-        <!-- Notice Interface en Test -->
-        <div class="beta-notice">
-            <i class="fas fa-flask"></i>
-            <strong>Interface en cours de test</strong> - Cette nouvelle interface moderne est actuellement en phase de test. 
-            Selon les retours des utilisateurs, elle sera déployée sur toute l'application (gestion admin, téléversement, etc.).
-        </div>
 
         <div class="profile-card">
             <!-- Header du profil -->