feat(komga): add Komga read-status sync with reports and history

Adds Komga sync feature to import read status from a Komga server.
Books are matched by title (case-insensitive) with series+title primary
match and title-only fallback. Sync reports are persisted with matched,
newly marked, and unmatched book lists. UI shows check icon for newly
marked books, sorted to top. Credentials (URL+username) are saved
between sessions. Uses HashSet for O(1) lookups to handle large libraries.

Closes #2

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

apps/backoffice/app/api/komga/reports/route.ts

@@ -0,0 +1,12 @@
+import { NextResponse } from "next/server";
+import { listKomgaReports } from "@/lib/api";
+
+export async function GET() {
+  try {
+    const data = await listKomgaReports();
+    return NextResponse.json(data);
+  } catch (error) {
+    const message = error instanceof Error ? error.message : "Failed to fetch reports";
+    return NextResponse.json({ error: message }, { status: 500 });
+  }
+}