Refactor router dependency wiring to explicit app state providers

backend/app/routers/dashboard.py

@@ -14,7 +14,7 @@ from __future__ import annotations
 
 from typing import Literal
 
-from fastapi import APIRouter, Query, Request
+from fastapi import APIRouter, Query
 
 from app import __version__
 from app.dependencies import (
@@ -22,6 +22,7 @@ from app.dependencies import (
     DbDep,
     Fail2BanSocketDep,
     HttpSessionDep,
+    ServerStatusDep,
 )
 from app.models.ban import (
     BanOrigin,
@@ -50,7 +51,7 @@ _DEFAULT_RANGE: TimeRange = "24h"
     summary="Return the cached fail2ban server status",
 )
 async def get_server_status(
-    request: Request,
+    server_status: ServerStatusDep,
     _auth: AuthDep,
 ) -> ServerStatusResponse:
     """Return the most recent fail2ban health snapshot.
@@ -60,18 +61,14 @@ async def get_server_status(
     returned so the response is always well-formed.
 
     Args:
-        request: The incoming request (used to access ``app.state``).
+        server_status: Cached fail2ban server health snapshot (injected).
         _auth: Validated session — enforces authentication on this endpoint.
 
     Returns:
         :class:`~app.models.server.ServerStatusResponse` containing the
         current health snapshot.
     """
-    cached: ServerStatus = getattr(
-        request.app.state,
-        "server_status",
-        ServerStatus(online=False),
-    )
+    cached: ServerStatus = server_status
     cached.version = __version__
     return ServerStatusResponse(status=cached)