Add support for publishing posts to both feed and stories simultaneously

Introduce a new 'both' post type allowing simultaneous publishing to Facebook and Instagram feeds and stories. This includes UI updates for selecting post types, backend logic for splitting 'both' posts into separate feed and story entries, and the ability to delete scheduled posts. The changes also include a new 'Pages gérées' link in the sidebar and necessary database schema updates.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ae4037a0-2a6f-4530-9bac-79b543286bda
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/397bca8c-984f-43ff-841a-10897aeb8140/ae4037a0-2a6f-4530-9bac-79b543286bda/WuFXYmm

server/storage.ts

@@ -62,6 +62,7 @@ export interface IStorage {
   // Scheduled Posts
   getScheduledPosts(userId: string, startDate?: Date, endDate?: Date): Promise<ScheduledPost[]>;
   getScheduledPost(id: string): Promise<ScheduledPost | undefined>;
+  getScheduledPostsByPost(postId: string): Promise<ScheduledPost[]>;
   createScheduledPost(scheduledPost: InsertScheduledPost): Promise<ScheduledPost>;
   updateScheduledPost(id: string, scheduledPost: Partial<ScheduledPost>): Promise<ScheduledPost>;
   deleteScheduledPost(id: string): Promise<void>;
@@ -210,6 +211,10 @@ export class DatabaseStorage implements IStorage {
     return scheduledPost || undefined;
   }
 
+  async getScheduledPostsByPost(postId: string): Promise<ScheduledPost[]> {
+    return await db.select().from(scheduledPosts).where(eq(scheduledPosts.postId, postId));
+  }
+
   async createScheduledPost(scheduledPost: InsertScheduledPost): Promise<ScheduledPost> {
     const [newScheduledPost] = await db.insert(scheduledPosts).values(scheduledPost).returning();
     return newScheduledPost;