[windows/ime] 恢复语音输入前的用户输入法

[Cooper-X-Oak]

This was generated by AI during triage.

Parent

#478

Triage

• Category: bug
• State: ready-for-agent
• Requested state label: ready-for-agent
• Requested repository labels (not applied by this run due label permissions): bug, windows, priority: high

What to build

修复 Windows 语音输入后输入法固定在 OpenLess 输入法的问题。OpenLess 可以在插入期间切换到自身 TSF/IME 后端，但必须在插入成功、剪贴板 fallback、取消、错误退出等路径后恢复用户原本的输入法或 language profile。

Acceptance criteria

• 语音输入前记录当前前台线程/窗口相关的输入法或 language profile。
• 插入成功后恢复语音输入前的输入法。
• 剪贴板 fallback 后也恢复语音输入前的输入法。
• 用户取消、ASR/LLM 错误、插入错误退出时也不会永久停留在 OpenLess 输入法。
• 微信输入法场景复测通过。
• Windows 10 22H2 场景复测通过。
• 恢复失败时日志记录具体 Windows API 层原因，而不是静默失败。

Blocked by

None - can start immediately.

Evidence

#469: Reporter 表示 Windows 语音输入后，输入法 100% 固定在 OpenLess 输入法，不会自动切回；输入法为微信输入法；环境为 Windows 10 专业版 22H2，OS build 19045.5854。

Expected / Actual

Expected: OpenLess 的输入法切换是无感、临时的；语音输入结束后用户继续手动打字时，仍使用之前的输入法。

Actual: 用户每次语音输入后都需要手动从 OpenLess 输入法切回原输入法，体验严重下降。

Validation gate

• 安装/注册 IME 后运行：powershell -ExecutionPolicy Bypass -File .\scripts\windows-ime-install-smoke.ps1 -InstallerKind nsis -InstallerPath <installer>。
• 人工复测：Windows 10 22H2 + 微信输入法，语音输入前后确认输入法自动恢复。
• 覆盖成功插入、fallback、取消、错误四条路径。
• 如改动 TSF/IME 注册或提交路径，运行相关 Windows IME packaging/test gate。

[Cooper-X-Oak]

This was generated by AI during triage.

Evidence Update - local completion

Maintainer direction for this queue: Windows 10-specific confirmation is no longer a local blocker. For this issue, logic-level repair plus local validation is sufficient; Windows 10 + WeChat IME feedback can come after the next beta release.

What was verified in current source:

• windows_ime_profile.rs already contains the [Windows] [bug] 语音输入后，输入法固定在了 OpenLess输入法,不会自动切回来. #469 root-cause fix: OpenLess activation uses legacy TSF + modern TSF, and restore mirrors the legacy side with ChangeCurrentLanguage(lang_id) + ActivateLanguageProfile(&clsid, lang_id, &profile_guid) before modern ActivateProfile.
• Keyboard-layout restore also calls ChangeCurrentLanguage(lang_id) before modern profile bookkeeping.
• restore_session logs restore failures as [windows-ime] restore saved profile failed: {error}.
• begin_session snapshots the user input profile before activating OpenLess IME.
• insert_with_windows_ime_first restores the saved IME immediately after TSF submit and before non-TSF fallback.
• The outer dictation path converges success insertion, streamed insertion, TSF fallback, focus/copy fallback, and failed insertion status through restore_prepared_windows_ime_session.
• Explicit cancel plus ASR/LLM error exits restore the prepared session for the active dictation.

New validation gate added:

cd openless-all/app
node .\scripts\windows-ime-restore.test.mjs

Additional local validation passed:

cd openless-all/app
$env:OPENLESS_EMBED_COMMON_CONTROLS_V6_MANIFEST = '1'
cargo test --manifest-path src-tauri/Cargo.toml --lib windows_ime_profile -- --nocapture
cargo test --manifest-path src-tauri/Cargo.toml --lib windows_ime_session -- --nocapture
cargo test --manifest-path src-tauri/Cargo.toml --lib prepared_windows_ime -- --nocapture

Results:

• windows_ime_profile: 12 passed.
• windows_ime_session: 6 passed.
• prepared_windows_ime: 3 passed.

State: locally complete for the first Windows beta high-frequency pass. Residual risk is limited to the reporter's exact Windows 10 22H2 + WeChat IME environment and should be handled as post-release feedback rather than blocking this queue.

[Cooper-X-Oak]

Closing per author request. I am pausing involvement with this project for now.