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/bridge/vpn_bridge.dart

@@ -110,9 +110,9 @@ class VpnStatsEvent {
         uploadSpeed: (m['uploadSpeed'] as num?)?.toDouble() ?? 0.0,
         downloadSpeed: (m['downloadSpeed'] as num?)?.toDouble() ?? 0.0,
         urltestResults: ((m['urltestResults'] as List?)
-                ?.where((e) => e is Map)
+                ?.whereType<Map>()
                 .map((e) => UrltestResult.fromMap(
-                      Map<String, dynamic>.from(e as Map),
+                      Map<String, dynamic>.from(e),
                     ))
                 .toList()) ??
             const [],