Remove Mock fallback from runtime_state and add runtime settings regression tests

backend/app/utils/runtime_state.py

@@ -15,11 +15,6 @@ from typing import TYPE_CHECKING, Any
 
 from starlette.datastructures import State
 
-try:
-    from unittest.mock import Mock as _Mock
-except ImportError:  # pragma: no cover
-    _Mock = None
-
 from app.models.config import PendingRecovery
 from app.models.server import ServerStatus
 
@@ -47,7 +42,7 @@ class RuntimeState:
     server_status: ServerStatus = field(default_factory=lambda: ServerStatus(online=False))
     pending_recovery: PendingRecovery | None = None
     last_activation: ActivationRecord | None = None
-    runtime_settings: "Settings" | None = None
+    runtime_settings: Settings | None = None
 
 
 class ApplicationState(State):
@@ -104,8 +99,6 @@ def get_app_settings(app: Any) -> Settings:
 def get_effective_settings(app: Any) -> Settings:
     """Return the effective settings for the current application instance."""
     runtime_settings = getattr(app.state, "runtime_settings", None)
-    if runtime_settings is not None and _Mock is not None and isinstance(runtime_settings, _Mock):
-        return get_app_settings(app)
     if runtime_settings is not None:
         return runtime_settings
     return get_app_settings(app)