ozellik: google oauth, gmail-drive araclari ve admin durum kartlarini ekle

backend/app/admin/services.py

@@ -169,7 +169,11 @@ class AdminService:
 
     def get_secret_mask(self, key: str) -> str:
         record = self.session.get(SecretORM, key)
-        value = record.value if record else ""
+        if record is not None:
+            value = record.value
+        else:
+            settings = get_settings()
+            value = str(getattr(settings, key, "") or "")
         if len(value) < 4:
             return ""
         return f"{value[:2]}***{value[-2:]}"