Fix ops admin back link and local /admin-api proxy.

Use SPA root for the return-to-ops nav and proxy /admin-api in Vite dev so super-admin API calls work locally.

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

ops/src/components/AdminLayout.tsx

@@ -16,7 +16,7 @@ export function AdminLayout() {
       </header>
       <nav className="nav">
         <NavLink
-          to="/ops"
+          to="/"
           style={{ opacity: 0.6 }}
         >
           ← 运营后台

ops/vite.config.ts

@@ -12,6 +12,7 @@ export default defineConfig({
   server: {
     port: 3002,
     proxy: {
+      '/admin-api': adminProxy,
       '/api': adminProxy,
       '/auth': authProxy,
     },