feat: worst-scan fansub web — initial release

Posts engine (SQLite + auto-publisher via poller), public feed with
clickable tags, reader, admin panel, submit/search/queue tools.
BFF proxy to pipeline API. Clean dark design. Docker-ready.

src/app/(app)/layout.tsx

@@ -0,0 +1,10 @@
+import { Sidebar } from "@/components/layout/sidebar"
+
+export default function AppLayout({ children }: { children: React.ReactNode }) {
+  return (
+    <div className="flex min-h-screen">
+      <Sidebar />
+      <main className="ml-56 flex-1 p-6 lg:p-8">{children}</main>
+    </div>
+  )
+}