feat: add replay button on completed jobs in the jobs table

Shows a "Replay" button on non-active jobs that re-creates a new job
of the same type and library. Supports all replayable job types:
rebuild, full_rebuild, rescan, scan, thumbnail_rebuild,
thumbnail_regenerate, metadata_batch, metadata_refresh.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

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

@@ -0,0 +1,38 @@
+import { NextRequest, NextResponse } from "next/server";
+import { apiFetch, IndexJobDto, rebuildIndex, rebuildThumbnails, regenerateThumbnails, startMetadataBatch, startMetadataRefresh } from "@/lib/api";
+
+export async function POST(
+  _request: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  const { id } = await params;
+  try {
+    const job = await apiFetch<IndexJobDto>(`/index/jobs/${id}`);
+    const libraryId = job.library_id ?? undefined;
+
+    switch (job.type) {
+      case "rebuild":
+        return NextResponse.json(await rebuildIndex(libraryId));
+      case "full_rebuild":
+        return NextResponse.json(await rebuildIndex(libraryId, true));
+      case "rescan":
+        return NextResponse.json(await rebuildIndex(libraryId, false, true));
+      case "scan":
+        return NextResponse.json(await rebuildIndex(libraryId));
+      case "thumbnail_rebuild":
+        return NextResponse.json(await rebuildThumbnails(libraryId));
+      case "thumbnail_regenerate":
+        return NextResponse.json(await regenerateThumbnails(libraryId));
+      case "metadata_batch":
+        if (!libraryId) return NextResponse.json({ error: "Library ID required for metadata batch" }, { status: 400 });
+        return NextResponse.json(await startMetadataBatch(libraryId));
+      case "metadata_refresh":
+        if (!libraryId) return NextResponse.json({ error: "Library ID required for metadata refresh" }, { status: 400 });
+        return NextResponse.json(await startMetadataRefresh(libraryId));
+      default:
+        return NextResponse.json({ error: `Cannot replay job type: ${job.type}` }, { status: 400 });
+    }
+  } catch (error) {
+    return NextResponse.json({ error: "Failed to replay job" }, { status: 500 });
+  }
+}