Refactor router dependency wiring to explicit app state providers

backend/app/routers/blocklist.py

@@ -121,16 +121,15 @@ async def create_blocklist(
     summary="Trigger a manual blocklist import",
 )
 async def run_import_now(
-    request: Request,
+    http_session: HttpSessionDep,
     db: DbDep,
     _auth: AuthDep,
-    http_session: HttpSessionDep,
     socket_path: Fail2BanSocketDep,
 ) -> ImportRunResult:
     """Download and apply all enabled blocklist sources immediately.
 
     Args:
-        request: Incoming request (used to access shared HTTP session).
+        http_session: Shared HTTP session (injected).
         db: Application database connection (injected).
         _auth: Validated session — enforces authentication.
 
@@ -155,7 +154,6 @@ async def run_import_now(
     summary="Get the current import schedule",
 )
 async def get_schedule(
-    request: Request,
     db: DbDep,
     _auth: AuthDep,
     scheduler: SchedulerDep,
@@ -188,10 +186,10 @@ async def get_schedule(
 )
 async def update_schedule(
     payload: ScheduleConfig,
-    request: Request,
     db: DbDep,
     _auth: AuthDep,
     scheduler: SchedulerDep,
+    request: Request,
 ) -> ScheduleInfo:
     """Persist a new schedule configuration and reschedule the import job.
 
@@ -342,7 +340,7 @@ async def delete_blocklist(
 )
 async def preview_blocklist(
     source_id: int,
-    request: Request,
+    http_session: HttpSessionDep,
     db: DbDep,
     _auth: AuthDep,
 ) -> PreviewResponse:
@@ -365,7 +363,6 @@ async def preview_blocklist(
     if source is None:
         raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Blocklist source not found.")
 
-    http_session: aiohttp.ClientSession = request.app.state.http_session
     try:
         return await blocklist_service.preview_source(source.url, http_session)
     except ValueError as exc: