unit test fixes

src/services/aiService.server.ts

@@ -128,7 +128,7 @@ export class AIService {
       // This preserves the dependency injection pattern used throughout the class.
       this.aiClient = genAI
         ? {
-            generateContent: (request) => {
+            generateContent: async (request) => {
               // The model name is now injected here, into every call, as the new SDK requires.
               // Architectural guard clause: All requests from this service must have content.
               // This prevents sending invalid requests to the API and satisfies TypeScript's strictness.