Fix Request type hints in redirect handlers

FastAPI requires type hints to recognize Request objects.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/__init__.py

@@ -5,7 +5,7 @@ Creates and configures the FastAPI application with all routers and middleware.
 """
 
 from pathlib import Path
-from fastapi import FastAPI
+from fastapi import FastAPI, Request
 from fastapi.staticfiles import StaticFiles
 
 from artdag_common import create_jinja_env
@@ -58,7 +58,7 @@ def create_app() -> FastAPI:
     from fastapi import APIRouter
     run_detail_router = APIRouter()
     @run_detail_router.get("/{run_id}")
-    async def run_detail_redirect(run_id: str, request):
+    async def run_detail_redirect(run_id: str, request: Request):
         from .routers.runs import run_detail
         return await run_detail(run_id, request)
     app.include_router(run_detail_router, prefix="/run", tags=["runs"])
@@ -67,7 +67,7 @@ def create_app() -> FastAPI:
     app.include_router(recipes.router, prefix="/recipes", tags=["recipes"])
     recipe_detail_router = APIRouter()
     @recipe_detail_router.get("/{recipe_id}")
-    async def recipe_detail_redirect(recipe_id: str, request):
+    async def recipe_detail_redirect(recipe_id: str, request: Request):
         from .routers.recipes import get_recipe
         return await get_recipe(recipe_id, request)
     app.include_router(recipe_detail_router, prefix="/recipe", tags=["recipes"])
@@ -78,7 +78,7 @@ def create_app() -> FastAPI:
     from fastapi import APIRouter as MediaRouter
     media_router = MediaRouter()
     @media_router.get("")
-    async def media_list_redirect(request, offset: int = 0, limit: int = 24):
+    async def media_list_redirect(request: Request, offset: int = 0, limit: int = 24):
         from .routers.cache import list_media
         return await list_media(request, offset, limit)
     app.include_router(media_router, prefix="/media", tags=["media"])