feat: 新增键盘快捷键设置

- 设置页新增「键盘快捷键」分类，可自定义快捷键绑定
- 支持快速滚动（Home/End/PageUp/PageDown）与导航跳转（Ctrl/Cmd+数字）
- 快捷键绑定与开关按动作独立持久化，默认关闭
- 新增 ui 包 keybinding 组件与工具（KeybindingModal/KeybindingChips 等）

packages/ui/src/components/base/index.ts

@@ -118,3 +118,4 @@ export { default as TimeFramePicker } from './TimeFramePicker.vue'
 export { default as Timeline } from './Timeline.vue'
 export { default as Toggle } from './Toggle.vue'
 export { default as UnsavedChangesPopup } from './UnsavedChangesPopup.vue'
+export { default as KeybindingChips } from './KeybindingChips.vue'