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

routes/Dpanel/API/SharedFolders.js

@@ -0,0 +1,36 @@
+const express = require('express');
+const fs = require('fs');
+const path = require('path');
+const router = express.Router();
+const authMiddleware = require('../../../Middlewares/authMiddleware');
+const { ErrorLogger } = require('../../../config/logs');
+
+// Quitter un dossier partagé
+router.post('/leave', authMiddleware, async (req, res) => {
+    try {
+        const userId = req.userData.name;
+        const { folderName, folderOwner } = req.body;
+        if (!folderName || !folderOwner) {
+            return res.status(400).json({ error: 'Missing folderName or folderOwner' });
+        }
+        const collabPath = path.join(__dirname, '../../../data', 'collaboration.json');
+        let collabData = JSON.parse(fs.readFileSync(collabPath, 'utf8'));
+        const itemId = `folder-${folderName}`;
+        if (!collabData.activeFiles[itemId]) {
+            return res.status(404).json({ error: 'Shared folder not found' });
+        }
+        // Retirer l'utilisateur de la liste des collaborateurs
+        collabData.activeFiles[itemId].activeUsers = collabData.activeFiles[itemId].activeUsers.filter(u => u.id !== userId);
+        // Si plus aucun utilisateur, on peut supprimer la collaboration
+        if (collabData.activeFiles[itemId].activeUsers.length === 0) {
+            delete collabData.activeFiles[itemId];
+        }
+        fs.writeFileSync(collabPath, JSON.stringify(collabData, null, 2), 'utf8');
+        return res.json({ success: true });
+    } catch (error) {
+        ErrorLogger.error('Error leaving shared folder:', error);
+        return res.status(500).json({ error: 'Erreur lors du quit du dossier partagé.' });
+    }
+});
+
+module.exports = router;