chore: upgrade models

- For code conversion `gemini-3-flash-preview`

Author: amir0ff

README.md

@@ -11,7 +11,7 @@ AI-powered codebase converter. Instantly convert code between frameworks (e.g.,
 
 ## Features
 - 🔄 Convert code between major frameworks (React, Vue, Angular, Svelte, SolidJS, Preact)
-- 🧠 Powered by Google `gemini-2.5-flash`
+- 🧠 Powered by Google `gemini-3-flash-preview`
 - 🚀 Monorepo for easy development and deployment
 
 ## Deployment & VPS Configuration

backend/utils/gemini.js

@@ -4,18 +4,14 @@ const axios = require('axios');
 
 const genAIClient = new GoogleGenerativeAI(process.env.GEMINI_API_KEY);
 
-/**
- * Optimized for high-quality code generation using the latest Gemini 3 model.
- */
 function genAI() {
-    return genAIClient.getGenerativeModel({model: 'gemini-2.5-flash'});
+    // Gemini 3 Flash is now the "Smarter" default for coding/conversion
+    return genAIClient.getGenerativeModel({ model: 'gemini-3-flash-preview' });
 }
 
-/**
- * Optimized for speed and high rate-limits for simple classification tasks.
- */
 function genDetectionAI() {
-    return genAIClient.getGenerativeModel({model: 'gemini-2.5-flash-lite'});
+    // 2.5 Flash-Lite is excellent for ultra-fast detection
+    return genAIClient.getGenerativeModel({ model: 'gemini-2.5-flash-lite' });
 }
 
 function buildPrompt(sourceCode, sourceStack, targetStack) {