diff --git a/.replit b/.replit
index f9a4cd6..164cd5a 100644
--- a/.replit
+++ b/.replit
@@ -14,6 +14,10 @@ run = ["npm", "run", "start"]
 localPort = 5000
 externalPort = 80
 
+[[ports]]
+localPort = 33821
+externalPort = 8099
+
 [[ports]]
 localPort = 34045
 externalPort = 3003
@@ -46,6 +50,10 @@ externalPort = 8081
 localPort = 40537
 externalPort = 3000
 
+[[ports]]
+localPort = 41803
+externalPort = 8008
+
 [[ports]]
 localPort = 42161
 externalPort = 6000
diff --git a/replit.md b/replit.md
index 2c7e2e7..94b0244 100644
--- a/replit.md
+++ b/replit.md
@@ -11,6 +11,9 @@ Preferred communication style: Simple, everyday language.
 ## Recent Changes
 
 ### October 10, 2025
+- **Calendar Permissions System**: Implemented comprehensive page-based permissions for calendar access. Admin users see all scheduled posts with full edit/delete rights. Standard users see only posts from their assigned pages via `user_page_permissions` table, but can only edit/delete their own posts (ownership check via `post.userId`). GET /api/scheduled-posts filters posts by accessible pages (admin bypass). DELETE and PATCH /api/scheduled-posts enforce ownership validation (admin can modify any post, users limited to own posts).
+- **Scheduled Posts Data Sync Fix**: Fixed critical bug where editing scheduled post time via PATCH /api/scheduled-posts/:id updated `scheduled_posts.scheduledAt` but not `posts.scheduledFor`, causing calendar/database inconsistency. Now both tables are synchronized: updating scheduledAt automatically updates scheduledFor via `storage.updatePost()`.
+- **Scheduled Posts Validation**: Added validation to POST /api/posts requiring `pageIds` when `scheduledFor` is provided. Prevents orphaned scheduled posts that would be invisible in calendar. Returns 400 error: "Les posts programmés nécessitent au moins une page cible".
 - **AI Assistant Admin-Only Access**: Restricted access to AI Assistant to administrators only. Route `/ai` now requires admin role with `adminOnly` prop. Sidebar moved "Assistant IA" link to Administration section (visible only to admins). Backend endpoints (`/api/ai/models`, `/api/ai/generate`, `/api/ai/generations`) protected with `requireAdmin` middleware. Standard users attempting to access AI features see "Accès refusé" message and receive 403 responses.
 
 ### October 9, 2025
diff --git a/server/routes.ts b/server/routes.ts
index 4b4dcc7..da9b905 100644
--- a/server/routes.ts
+++ b/server/routes.ts
@@ -611,6 +611,11 @@ export async function registerRoutes(app: Express): Promise<Server> {
       // Set status to "scheduled" if scheduledFor is provided, otherwise "draft"
       if (postFields.scheduledFor) {
         postFields.status = "scheduled";
+        
+        // Validate that scheduled posts require at least one page
+        if (!pageIds || !Array.isArray(pageIds) || pageIds.length === 0) {
+          return res.status(400).json({ error: "Les posts programmés nécessitent au moins une page cible" });
+        }
       }
       
       // Create the post
@@ -758,7 +763,23 @@ export async function registerRoutes(app: Express): Promise<Server> {
       const start = startDate ? new Date(startDate as string) : undefined;
       const end = endDate ? new Date(endDate as string) : undefined;
       
-      const scheduledPosts = await storage.getScheduledPosts(userId, start, end);
+      let scheduledPosts;
+      
+      if (user.role === 'admin') {
+        // Admin voit tous les posts programmés
+        const allUsers = await storage.getAllUsers();
+        const allPostsPromises = allUsers.map(u => storage.getScheduledPosts(u.id, start, end));
+        const allPostsArrays = await Promise.all(allPostsPromises);
+        scheduledPosts = allPostsArrays.flat();
+      } else {
+        // User voit uniquement les posts des pages qui lui sont attribuées
+        const accessiblePages = await storage.getUserAccessiblePages(userId);
+        const accessiblePageIds = accessiblePages.map(p => p.id);
+        
+        const userScheduledPosts = await storage.getScheduledPosts(userId, start, end);
+        scheduledPosts = userScheduledPosts.filter(sp => accessiblePageIds.includes(sp.pageId));
+      }
+      
       res.json(scheduledPosts);
     } catch (error) {
       console.error("Error fetching scheduled posts:", error);
@@ -772,14 +793,19 @@ export async function registerRoutes(app: Express): Promise<Server> {
       const userId = user.id;
       const { id } = req.params;
       
-      // Verify the scheduled post belongs to the user before deleting
+      // Verify the scheduled post exists
       const scheduledPost = await storage.getScheduledPost(id);
       if (!scheduledPost) {
         return res.status(404).json({ error: "Scheduled post not found" });
       }
       
       const post = await storage.getPost(scheduledPost.postId);
-      if (!post || post.userId !== userId) {
+      if (!post) {
+        return res.status(404).json({ error: "Post not found" });
+      }
+      
+      // Admin peut tout supprimer, user peut supprimer uniquement ses propres posts
+      if (user.role !== 'admin' && post.userId !== userId) {
         return res.status(403).json({ error: "Unauthorized" });
       }
       
@@ -797,14 +823,19 @@ export async function registerRoutes(app: Express): Promise<Server> {
       const userId = user.id;
       const { id } = req.params;
       
-      // Verify the scheduled post belongs to the user before updating
+      // Verify the scheduled post exists
       const scheduledPost = await storage.getScheduledPost(id);
       if (!scheduledPost) {
         return res.status(404).json({ error: "Scheduled post not found" });
       }
       
       const post = await storage.getPost(scheduledPost.postId);
-      if (!post || post.userId !== userId) {
+      if (!post) {
+        return res.status(404).json({ error: "Post not found" });
+      }
+      
+      // Admin peut tout modifier, user peut modifier uniquement ses propres posts
+      if (user.role !== 'admin' && post.userId !== userId) {
         return res.status(403).json({ error: "Unauthorized" });
       }
       
@@ -814,6 +845,8 @@ export async function registerRoutes(app: Express): Promise<Server> {
       
       if (scheduledAt) {
         updateData.scheduledAt = new Date(scheduledAt);
+        // Synchroniser avec la table posts
+        await storage.updatePost(scheduledPost.postId, { scheduledFor: new Date(scheduledAt) });
       }
       
       if (pageId) {