fix(setting): 修复全局快捷键取词时机

[Particaly]

等待全局快捷键按键释放后再执行复制取词，并在快捷键注册期间保持键盘状态监听，避免修饰键残留导致取词异常或卡住。

[gemini-code-assist]

Code Review

This pull request introduces a system to capture selected text context upon global shortcut activation by simulating a copy command and monitoring the clipboard. It adds shortcut cooldowns, key release detection, and a sequence-based clipboard update waiter. Feedback from the review highlights the need for timeouts in asynchronous wait functions to prevent potential hangs, recommends triggering context capture conditionally to avoid side effects on unrelated shortcuts, and suggests removing debug logs.