code agent google provider

src/config/constants.ts

@@ -1,5 +1,7 @@
 const constants = {
   OPENROUTER_API_KEY: process.env.OPENROUTER_API_KEY || "",
+  GOOGLE_API_KEY: process.env.GOOGLE_API_KEY || "",
+  MODEL_NAME: process.env.MODEL_NAME || "gemini-2.5-flash",
 };
 
 export default constants;