Fix run detail page and recipe name

- Render HTML template for run detail (not just JSON)
- Get recipe name from pending_runs instead of hardcoding "dag"

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

app/routers/runs.py

@@ -89,8 +89,9 @@ async def create_run(
     return run
 
 
-@router.get("/{run_id}", response_model=RunStatus)
+@router.get("/{run_id}")
 async def get_run(
+    request: Request,
     run_id: str,
     run_service: RunService = Depends(get_run_service),
 ):
@@ -98,7 +99,16 @@ async def get_run(
     run = await run_service.get_run(run_id)
     if not run:
         raise HTTPException(404, f"Run {run_id} not found")
-    return run
+
+    if wants_json(request):
+        return run
+
+    # Render HTML detail page
+    templates = get_templates(request)
+    return render(templates, "runs/detail.html", request,
+        run=run,
+        active_tab="runs",
+    )
 
 
 @router.delete("/{run_id}")