fix(windows): 归一 QA hotkey 的跨平台修饰键语义

[Cooper-X-Oak]

摘要

Fixes #148

说明这个 PR 解决的单一目标：归一 QA hotkey 的跨平台 modifier 语义，避免 macOS cmd 偏好在 Windows runtime 中字面漂移成 Win 键。

问题层面 / Problem layer

• 这是 跨平台配置语义层 / config normalization + migration 的修复。
• 当前运行态错误主要在 Windows 暴露，但 PR 目标是修正共享配置模型，而不是只补一个 Windows 临时映射。

修复 / 新增 / 改进

• 占位 draft PR：后续只承接 issue [windows] QA hotkey 跨平台配置未归一，cmd 语义漂移为 Win 键 #148 的配置迁移 / normalization 修复
• 预期改动范围：qa_hotkey.rs / preference load or migration path / cross-platform validation

兼容

• 不包含：QA panel UI、ASR/LLM 请求链路、Windows 主窗口视觉问题
• 对现有用户 / 本地环境 / 构建流程的影响：可能涉及历史 qaHotkey 配置迁移与默认值回显

测试计划

• 命令：最小配置迁移验证 + Windows runtime hotkey 验证
• 结果：Windows 不再把历史 cmd 语义静默注册为 Win hotkey
• 证据路径：issue [windows] QA hotkey 跨平台配置未归一，cmd 语义漂移为 Win 键 #148 / preferences.json before-after / openless.log

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Update Windows expectations for cmd alias behavior

On Windows targets this change remaps cmd/command to ctrl in parse_binding, but the existing parse_letter_binding unit test in the same file still asserts that cmd sets Modifiers::SUPER; that test will now fail whenever tests are run for target_os = "windows", creating a platform-specific red CI and hiding real regressions behind expected failures.

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