Separate bootstrap settings from runtime overrides with a dedicated runtime settings manager

backend/app/dependencies.py

@@ -20,7 +20,7 @@ from app.config import Settings
 from app.models.auth import Session
 from app.models.config import PendingRecovery
 from app.models.server import ServerStatus
-from app.utils.runtime_state import RuntimeState
+from app.utils.runtime_state import RuntimeState, get_effective_settings
 from app.utils.session_cache import SessionCache
 
 log: structlog.stdlib.BoundLogger = structlog.get_logger()
@@ -35,6 +35,7 @@ class AppState(Protocol):
     server_status: ServerStatus
     pending_recovery: PendingRecovery | None
     last_activation: dict[str, datetime.datetime] | None
+    runtime_settings: Settings | None
     runtime_state: RuntimeState
     session_cache: SessionCache
 
@@ -90,16 +91,8 @@ async def get_db(request: Request) -> AsyncGenerator[aiosqlite.Connection, None]
 
 
 async def get_settings(request: Request) -> Settings:
-    """Provide the :class:`~app.config.Settings` instance from ``app.state``.
-
-    Args:
-        request: The current FastAPI request (injected automatically).
-
-    Returns:
-        The application settings loaded at startup.
-    """
-    state = cast("AppState", request.app.state)
-    return state.settings
+    """Provide the effective application settings for the current request."""
+    return get_effective_settings(request.app)
 
 
 async def get_http_session(request: Request) -> aiohttp.ClientSession: