deployment fixes

backend/src/media_library_viewer_api/config.py

@@ -55,9 +55,8 @@ class Settings(BaseSettings):
     ssh_host: str = ""
     ssh_username: str = ""
     ssh_port: int = 22
-    ssh_key_directory: str = str(Path.home() / ".ssh")
-    ssh_key_name: str = "id_rsa"
-    ssh_key_filename: str = ""  # legacy direct override (full path)
+    ssh_key_directory: str = ""
+    ssh_key_name: str = ""
     ssh_password: str = ""
 
     # Remote paths
@@ -75,8 +74,8 @@ class Settings(BaseSettings):
 
     @property
     def ssh_key_path(self) -> str:
-        if self.ssh_key_filename:
-            return self.ssh_key_filename
+        if not self.ssh_key_directory or not self.ssh_key_name:
+            return ""
         return str(Path(self.ssh_key_directory) / self.ssh_key_name)
 
     model_config = {"env_file": ".env", "env_file_encoding": "utf-8", "extra": "ignore"}