Update announcement system to use production database and improve card design

Integrate PostgreSQL for announcement storage, aligning with production requirements and updating the announcement card UI for better visual consistency and user experience.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: e437ffed-c31b-44eb-9fd5-b6f9faa8e7ce
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/1957c339-2757-4d1f-8e92-e9f71a1ce58e/e437ffed-c31b-44eb-9fd5-b6f9faa8e7ce/DII5ZDt

shared/schema.ts

@@ -70,6 +70,8 @@ export const userGroups = pgTable("user_groups", {
   createdAt: timestamp("created_at").defaultNow(),
 });
 
+
+
 // Suppliers - Schema exact correspondant à la production
 export const suppliers = pgTable("suppliers", {
   id: serial("id").primaryKey(),
@@ -530,15 +532,12 @@ export const insertTaskSchema = createInsertSchema(tasks).omit({
   dueDate: z.coerce.date().optional().nullable(), // Convertit automatiquement les chaînes en Date
 });
 
-export const insertAnnouncementSchema = createInsertSchema(dashboardMessages).omit({
+export const insertDashboardMessageSchema = createInsertSchema(dashboardMessages).omit({
   id: true,
   createdAt: true,
-}).extend({
-  type: z.enum(["info", "warning", "error", "success"]).default("info"),
 });
 
-// Mapping pour la compatibilité avec l'interface actuelle
-export const insertDashboardMessageSchema = insertAnnouncementSchema;
+export const insertAnnouncementSchema = insertDashboardMessageSchema;
 
 export const insertNocodbConfigSchema = createInsertSchema(nocodbConfig).omit({
   id: true,