feat: expose detected env names in status for diagnostic

backend/main.py

@@ -155,6 +155,7 @@ async def get_model_info():
 
 @app.get("/api/v1/status", tags=["System"])
 async def api_status():
+    env_keys = [k for k in os.environ.keys() if any(w in k.upper() for w in ["GEMINI", "GOOGLE", "KEY", "TOKEN", "SECRET"])]
     return {
         "status": "online",
         "version": settings.app_version,
@@ -162,6 +163,7 @@ async def api_status():
         "gemini_active": inference_engine.is_configured(),
         "ai_model": "Google Gemini 3.8 Flash",
         "ai_active": inference_engine.is_configured(),
+        "detected_env_names": env_keys,
         "supported_crops_count": "Universal"
     }