fix(ci): 修 flutter analyze 闸长期 exit 1(形同虚设)

发现:CI flutter analyze 退出码 1(1204 个 info,0 error/warning),其中 1191 来自
第三方 vendored 包 lucide_icons_patched —— 这道闸一直红/无效。
- analysis_options.yaml:exclude packages/lucide_icons_patched/**(去 1191 噪音)
- ci.yml:flutter analyze --no-fatal-infos(info 是建议级不该硬挡 merge;
  error/warning 仍致命)→ analyze EXIT 0、闸真正可用
- 顺手清 11 个 clean 文件 info:auth_api 删 >>>AUTHLOG 调试 print 残留(+unused sw)、
  account_page/plan_card withOpacity→withValues、vpn_bridge where(is Map)→whereType、
  测试文件删多余 import + final→const
- 剩 2 个 info 在 stats-overhaul dirty 文件(stats_page/device_stat_row),留其合并清
- 验证:flutter analyze --no-fatal-infos EXIT 0(1204→2)、flutter test 48 全过

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

client/lib/services/auth_api.dart

@@ -99,8 +99,6 @@ class AuthApi {
 
   Future<http.Response> _post(String path, Map<String, dynamic> body) async {
     final uri = Uri.parse('$baseUrl$path');
-    print('>>>AUTHLOG POST $uri (baseUrl=$baseUrl) 发起...');
-    final sw = Stopwatch()..start();
     try {
       final resp = await _client
           .post(
@@ -109,10 +107,8 @@ class AuthApi {
             body: jsonEncode(body),
           )
           .timeout(const Duration(seconds: 15));
-      print('>>>AUTHLOG POST $uri -> HTTP ${resp.statusCode} (${sw.elapsedMilliseconds}ms)');
       return resp;
     } on Exception catch (e) {
-      print('>>>AUTHLOG POST $uri 失败 (${sw.elapsedMilliseconds}ms): ${e.runtimeType}: $e');
       throw AuthApiException(
         statusCode: -1,
         messageZh: '网络请求失败，请检查连接后重试',