feat: add replay button for download detection jobs and color-coded job type badges

Add download_detection to replayable job types and replay route handler.
Give each job type a unique colored background badge for better visual
distinction in the jobs table.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/backoffice/app/api/jobs/[id]/replay/route.ts

@@ -1,5 +1,5 @@
 import { NextRequest, NextResponse } from "next/server";
-import { apiFetch, IndexJobDto, rebuildIndex, rebuildThumbnails, regenerateThumbnails, startMetadataBatch, startMetadataRefresh, startReadingStatusMatch, startReadingStatusPush } from "@/lib/api";
+import { apiFetch, IndexJobDto, rebuildIndex, rebuildThumbnails, regenerateThumbnails, startMetadataBatch, startMetadataRefresh, startReadingStatusMatch, startReadingStatusPush, startDownloadDetection } from "@/lib/api";
 
 export async function POST(
   _request: NextRequest,
@@ -35,6 +35,9 @@ export async function POST(
       case "reading_status_push":
         if (!libraryId) return NextResponse.json({ error: "Library ID required for reading status push" }, { status: 400 });
         return NextResponse.json(await startReadingStatusPush(libraryId));
+      case "download_detection":
+        if (!libraryId) return NextResponse.json({ error: "Library ID required for download detection" }, { status: 400 });
+        return NextResponse.json(await startDownloadDetection(libraryId));
       default:
         return NextResponse.json({ error: `Cannot replay job type: ${job.type}` }, { status: 400 });
     }