Allow all users to generate AI text for posts

Change API endpoint `/api/ai/generate` from `requireAdmin` to `requireAuth` middleware and update OpenRouterService to use shared admin configuration instead of per-user config.

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

server/routes.ts

@@ -435,7 +435,7 @@ export async function registerRoutes(app: Express): Promise<Server> {
   });
 
   // AI text generation
-  app.post("/api/ai/generate", requireAdmin, async (req, res) => {
+  app.post("/api/ai/generate", requireAuth, async (req, res) => {
     try {
       const user = req.user as User;
       const userId = user.id;

server/services/openrouter.ts

@@ -18,11 +18,11 @@ export class OpenRouterService {
   private baseUrl = "https://openrouter.ai/api/v1/chat/completions";
 
   async generatePostText(productInfo: ProductInfo, userId: string, modelOverride?: string): Promise<GeneratedText[]> {
-    // Get user's OpenRouter configuration
-    const config = await storage.getOpenrouterConfig(userId);
+    // Get any available OpenRouter configuration (shared across all users)
+    const config = await storage.getAnyOpenrouterConfig();
     
     if (!config) {
-      throw new Error('Configuration OpenRouter non trouvée. Veuillez configurer OpenRouter dans les paramètres.');
+      throw new Error('Configuration OpenRouter non trouvée. Veuillez demander à un administrateur de configurer OpenRouter dans les Paramètres.');
     }
 
     const prompt = this.buildPrompt(productInfo, config.systemPrompt);

server/storage.ts

@@ -85,6 +85,7 @@ export interface IStorage {
 
   // OpenRouter Config
   getOpenrouterConfig(userId: string): Promise<OpenrouterConfig | undefined>;
+  getAnyOpenrouterConfig(): Promise<OpenrouterConfig | undefined>;
   createOpenrouterConfig(config: InsertOpenrouterConfig): Promise<OpenrouterConfig>;
   updateOpenrouterConfig(userId: string, config: Partial<InsertOpenrouterConfig>): Promise<OpenrouterConfig>;
 
@@ -336,6 +337,11 @@ export class DatabaseStorage implements IStorage {
     return config || undefined;
   }
 
+  async getAnyOpenrouterConfig(): Promise<OpenrouterConfig | undefined> {
+    const [config] = await db.select().from(openrouterConfig).limit(1);
+    return config || undefined;
+  }
+
   async createOpenrouterConfig(config: InsertOpenrouterConfig): Promise<OpenrouterConfig> {
     const [newConfig] = await db.insert(openrouterConfig).values(config).returning();
     return newConfig;