feat: M3 mosh 挂起→恢复<3s（唤醒脉冲 + 会话状态机三相）

- SessionMachine 加 mosh 三相(moshActive/moshParked/moshResuming)+看门狗兜底，
  mosh 接管即拆 SSH、后台冻结不重建、前台唤醒脉冲等 SSP 续（+5 单测）
- bridge.go: Node.WakeUp()(tsnet InjectEvent+MagicSock.Rebind/ReSTUN) +
  MoshRelay.Rebind()(同端口重开 loopback、泵按 socket 生成容错)
- iosclient.cc: g_mosh_last_heard 探针(导出 mosh_last_heard_ms) + SIGCONT 全屏重绘
- MoshSession: nudge()(SIGCONT) + lastHeardMs()；SSHTerminalModel 前台脉冲三连
  + healthy 轮询 + beginBackgroundTask；URL scheme 供无头前台唤醒
- 验证(vohive-vm over tsnet)：15s 冻结→前台 wake pulse→1.3s recovered，<3s

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/TerminalX/project.yml

@@ -40,6 +40,8 @@ targets:
         CURRENT_PROJECT_VERSION: "1"
         SWIFT_VERSION: "6.0"
         GENERATE_INFOPLIST_FILE: YES
+        # 部分 Info.plist 基底（仅 URL scheme，供无头验证前台唤醒）；生成键合并其上。
+        INFOPLIST_FILE: TerminalX-Info.plist
         TARGETED_DEVICE_FAMILY: "1,2"
         INFOPLIST_KEY_UILaunchScreen_Generation: YES
         INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents: YES