Add Docker Registry AIO with Nuxt Token Auth and admin UI.

Compose brings up registry:3 plus a Prisma/SQLite Nuxt app for docker login, ACL management, and image browsing with shadcn-vue.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/server/api/repositories/index.get.ts

@@ -0,0 +1,16 @@
+export default defineEventHandler(async (event) => {
+  await requireSession(event)
+  await ensureBootstrap()
+
+  try {
+    const repositories = await listRepositories()
+    return { repositories }
+  } catch (err: any) {
+    // Registry may be unreachable during local UI-only boot
+    if (err?.statusCode) throw err
+    throw createError({
+      statusCode: 502,
+      statusMessage: err?.message || 'Failed to reach registry',
+    })
+  }
+})