Update app.js

app.js

@@ -150,7 +150,7 @@ ${JSON.stringify({ description: project.description })}
   // Use gemini-1.5-flash or 2.0-flash depending on what you have access to.
   // 1.5-flash is very stable.
   const resp = await ai.models.generateContent({
-    model: "gemini-1.5-flash", 
+    model: "gemini-2.5-pro", 
     contents: systemPrompt,
     generationConfig: { responseMimeType: "application/json" }
   });