feat(windows): 新增「始终使用 SendInput」开关，跳过听写时的 TSF 切换

[HKLHaoBin]

User description

摘要

Fixes #733

新增 Windows 专用 opt-in 开关「始终使用 SendInput（不切换输入法）」。开启后听写 session 不再调用 prepare_session() 切换 OpenLess TSF，全程使用 SendInput Unicode 插入。同时修复设置开关保存后立刻回落的问题（serde JSON key 与前端不一致）。

修复 / 新增 / 改进

• 新增偏好 windowsSendInputInsertionOnly / windows_sendinput_insertion_only（默认 false）
• begin_session 条件跳过 windows_ime.prepare_session()；插入走 insert_via_non_tsf_fallback
• 设置页「插入与剪贴板」新增开关（仅 Windows），位于「允许非 TSF 兜底」上方
• 修复 serde camelCase 产出 windowsSendinputInsertionOnly 导致前端 key 被忽略、开关保存回落
• 补充 wire key 合同测试与 SendInput-only 模式下 dictation_error_code 单元测试

兼容

• 不包含：Android IME、TSF DLL 修改、合并「允许非 TSF 兜底」开关
• 对现有用户 / 本地环境 / 构建流程的影响：默认关闭，行为与现版一致；alias 兼容旧错误 key 写入的 preferences.json

测试计划

• 命令：npm run build --prefix openless-all/app；CI workflow_dispatch（run 27925685545）全绿
• 命令：cargo test windows_sendinput --lib（Windows CI job 通过）
• 结果：Release Tauri run 27925685566 success，产物 openless-windows-x64
• 证据路径：装包后验证开关持久化（preferences.json 含 "windowsSendInputInsertionOnly": true）；听写开始/结束任务栏输入法不变

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PR Type

Enhancement, Bug fix

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Description

• Add Windows "Always use SendInput" preference (default off)

• Skip TSF IME switch during dictation when preference enabled

• Fix serde JSON key mismatch for preference persistence

• Add i18n translations and settings UI toggle

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Diagram Walkthrough

flowchart LR
  A["User enables SendInput-only"] --> B{"begin_session"}
  B -- "pref on" --> C["Skip TSF prepare_session"]
  B -- "pref off" --> D["TSF as usual"]
  C --> E["end_session"]
  E --> F["insert_via_non_tsf_fallback or SendInput"]
  F --> G["Insert without IME switch"]

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File Walkthrough

	Relevant files
Enhancement	4 files coordinator.rs Make insert_via_non_tsf_fallback pub(super)                            +11/-3    dictation.rs Implement SendInput-only path in begin/end session              +33/-14  types.ts Add interface field for SendInput-only preference                +2/-0      RecordingInputSection.tsx Add toggle UI for SendInput-only mode                                        +13/-0
Bug fix	1 files types.rs Add windows_sendinput_insertion_only preference with serde fix +63/-0
Documentation	5 files en.ts Add i18n strings for SendInput-only toggle                              +2/-0      ja.ts Add Japanese i18n for SendInput-only toggle                            +2/-0      ko.ts Add Korean i18n for SendInput-only toggle                                +2/-0      zh-CN.ts Add Simplified Chinese i18n for SendInput-only toggle        +2/-0      zh-TW.ts Add Traditional Chinese i18n for SendInput-only toggle      +2/-0
Miscellaneous	1 files mock-data.ts Add default value for windowsSendInputInsertionOnly            +1/-0
Tests	1 files stylePrefs.test.ts Add field to test preferences mock                                              +1/-0

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[github-actions]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

🎫 Ticket compliance analysis ✅ 733 - Fully compliant Compliant requirements: New preference field added with serde default, rename, alias. begin_session skips prepare_session when windows_sendinput_insertion_only is true. end_session uses SendInput-only branch when windows_sendinput_insertion_only is true. UI toggle placed above "允许非 TSF 兜底" and only on Windows. i18n strings added for all 5 languages. Unit tests for default, deserialization from correct and legacy keys, serialization, round-trip. Unit test for dictation_error_code skipping TSF error in SendInput-only mode. Legacy wrong-case key supported via serde alias.

⏱️ Estimated effort to review: 3 🔵🔵🔵⚪⚪

🧪 PR contains tests

🔒 No security concerns identified

⚡ No major issues detected

[HKLHaoBin]

## 就是这个东西，不需要切换输入法，频繁遇到输入法切换问题的人有福了。 因为不需要切换输入法，所以杜绝了恢复输入法功能异常的问题。