feat: add serve command — zero-config WebMCP server with hot reload detection

- flutter-skill serve <url> — auto-discovers all interactive elements
- Exposes as MCP-compatible REST API (tools/list, tools/call)
- DOM MutationObserver for real-time tool updates
- Hot reload detection: Vite HMR, Webpack HMR, React Fast Refresh, Flutter Web
- Zero config, zero dependencies, zero code changes needed
- Supports --headless, --no-launch, --cdp-port, --port flags
- Text snapshot + screenshot endpoints
- CORS enabled for browser-based MCP clients

Author: GitLab CI

bin/flutter_skill.dart

@@ -8,6 +8,7 @@ import 'package:flutter_skill/src/cli/setup_priority.dart';
 import 'package:flutter_skill/src/cli/doctor.dart';
 import 'package:flutter_skill/src/cli/init.dart';
 import 'package:flutter_skill/src/cli/demo.dart';
+import 'package:flutter_skill/src/cli/serve.dart';
 
 void main(List<String> args) async {
   if (args.isEmpty) {
@@ -21,6 +22,7 @@ void main(List<String> args) async {
     print('  inspect      Inspect interactive elements');
     print('  act          Perform actions (tap, enter_text, scroll)');
     print('  screenshot   Take a screenshot of the running app');
+    print('  serve <url>  Zero-config WebMCP server — any site → AI tools');
     print('  test <url>   Zero-config web testing — launch Chrome + CDP');
     print('  doctor       Check installation and environment health');
     print('  setup        Install tool priority rules for Claude Code');
@@ -90,6 +92,9 @@ void main(List<String> args) async {
     case 'report-error':
       await runReportError(commandArgs);
       break;
+    case 'serve':
+      await runServe(commandArgs);
+      break;
     case 'test':
       // Convenience wrapper: `flutter-skill test <url>` → `server --url=<url>`
       if (commandArgs.isEmpty) {

lib/src/bridge/cdp_driver.dart

@@ -1155,6 +1155,11 @@ class CdpDriver implements AppDriver {
     return null;
   }
 
+  /// Public CDP method call — used by serve command and external callers.
+  Future<Map<String, dynamic>> call(String method,
+          [Map<String, dynamic>? params]) =>
+      _call(method, params);
+
   Future<Map<String, dynamic>> _call(String method,
       [Map<String, dynamic>? params]) async {
     if (_ws == null || !_connected) {