fix: reject UI operations when the input desktop is unavailable
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# 锁定桌面的失败保护(2026-09-05)
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## 问题与修复
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Windows Session 1 断开并出现同会话的 `LogonUI` 后,UIA 仍可读取微信窗口。单靠 `Environment.UserInteractive`、窗口存在和控件齐全,会把不可操作的桌面误判为可发送,甚至先写入测试草稿再在鼠标点击时失败。
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共享检查使用当前进程的非零会话、`Environment.UserInteractive` 和公开 Win32 `GetCursorPos` 的输入桌面访问结果。不尝试解锁、切换到登录桌面或重启微信。
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- `doctor` 新增 `InputDesktopAvailable`;不可访问时报告 `SessionLocked`。
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- 会话附着、输入步骤、鼠标点击和独立监听绑定前检查桌面。
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- 监听启动时立即拒绝不可操作的桌面;运行期间重新绑定也检查,不能把锁屏 UIA 快照算作正常心跳。
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## 已验证的范围
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本次从 Git 暂存区单独导出锁屏保护源码,构建并发布 `releases/desktop-guard-only-1`;不包含工作区尚待验收的命名文本发送改动。
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- Windows 10.0.19044,微信 4.1.13.63,已锁定/断开的 Session 1。
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- 发布程序 SHA-256:`355AA5DA758998A07D0BA7FA883858E0B664F5FDB8745BFFE322F383F94BEF2A`。
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- Core 72/72 通过;完整 Release 构建与 self-contained 发布为 0 警告、0 错误。
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- `doctor` 退出 2,`InputDesktopAvailable=false`,错误含 `SessionLocked`。
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- 只读 `inspect-ui` 退出 0:证明 UIA 可读并不等于桌面可操作。
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- `smoke`、`chat send`、`chat monitor` 均退出 1,并明确报告 `SessionLocked`;这是本负向测试的预期结果,不是正向 smoke 通过。
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- 测试独立读取输入框值并仅在内存中计算摘要,确认执行前后草稿未变;没有创建监听 checkpoint。
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复现:`scripts/windows/Test-LockedDesktop.ps1 -Executable <exe> -OutputDirectory <新目录>`。脚本要求桌面已经不可操作;它不会主动锁屏或断开会话。
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脱敏结果:`evidence/Locked-Desktop-20260905/`。
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## 仍未验收
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原会话需要由用户重新连接并解锁,之后补做正向发送/重复文本/双窗口事件隔离回归。此前点击失败与桌面不可访问有关,不能据此声称旧控件引用是已经证实的唯一根因。本记录不代表完整 M6 验收,更不能替代 8/24/72 小时耐久测试。
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@@ -0,0 +1,71 @@
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{
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"OperatingSystem": "Microsoft Windows NT 10.0.19044.0",
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"UserInteractive": true,
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"CurrentSessionId": 1,
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"Processes": [
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{
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"Id": 8912,
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"WorkingSetBytes": 54181888,
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"SessionId": 1,
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"Version": "4.1.13.63",
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"CanReadMemory": true,
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"AccessError": null,
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"HandleCount": 2527,
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"ThreadCount": 124
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},
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{
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"Id": 11064,
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"WorkingSetBytes": 9629696,
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"SessionId": 1,
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"Version": "4.1.13.63",
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"CanReadMemory": true,
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"AccessError": null,
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"HandleCount": 301,
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"ThreadCount": 10
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},
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{
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"Id": 17780,
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"WorkingSetBytes": 8536064,
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"SessionId": 1,
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"Version": "4.1.13.63",
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"CanReadMemory": true,
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"AccessError": null,
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"HandleCount": 376,
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"ThreadCount": 15
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},
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{
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"Id": 2436,
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"WorkingSetBytes": 1191936,
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"SessionId": 1,
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"Version": "4.1.13.63",
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"CanReadMemory": true,
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"AccessError": null,
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"HandleCount": 219,
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"ThreadCount": 19
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},
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{
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"Id": 14720,
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"WorkingSetBytes": 987136,
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"SessionId": 1,
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"Version": "4.1.13.63",
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"CanReadMemory": true,
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"AccessError": null,
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"HandleCount": 216,
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"ThreadCount": 13
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}
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],
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"WindowFound": true,
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"RequiredControls": {
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"MainView": true,
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"session_list": true,
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"chat_message_page": true,
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"chat_message_list": true,
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"chat_input_field": true,
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"tool_bar_accessible": true
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},
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"DataRootCount": 1,
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"Errors": [
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"SessionLocked"
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],
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"InputDesktopAvailable": false
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}
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@@ -0,0 +1,15 @@
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{
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"InspectExit": 0,
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"DraftUnchanged": true,
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"ListenerError": "SessionLocked",
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"SendExit": 1,
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"SendError": "SessionLocked",
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"SmokeExit": 1,
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"DoctorExit": 2,
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"InputDesktopAvailable": false,
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"ListenerExit": 1,
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"BinarySha256": "355AA5DA758998A07D0BA7FA883858E0B664F5FDB8745BFFE322F383F94BEF2A",
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"Success": true,
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"SmokeError": "SessionLocked",
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"CheckpointCreated": false
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}
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