feat: order revision, rial wage from variant, product tags; drop user-app-v2

Admin order edit with category chips and timeline; customer checkout charges variant rialWage; product tags; retire the unused user-app-v2 tree.

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

apps/user-app/vite.config.ts

@@ -57,8 +57,11 @@ export default defineConfig({
     // stuck dev server is obvious rather than moving to a random port.
     strictPort: true,
     proxy: {
-      '/api': `http://localhost:${apiPort}`,
-      '/uploads': `http://localhost:${apiPort}`,
+      // 127.0.0.1, not localhost: on Windows localhost often prefers ::1, and
+      // another process can bind only IPv6 :3000 while our API is on IPv4 —
+      // the proxy then hits the wrong app and every /api call 404s.
+      '/api': `http://127.0.0.1:${apiPort}`,
+      '/uploads': `http://127.0.0.1:${apiPort}`,
     },
   },
   css: {