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/KeybindingChips.vue

@@ -0,0 +1,23 @@
+<template>
+	<span class="inline-flex flex-wrap items-center gap-1">
+		<kbd
+			v-for="(part, index) in parts"
+			:key="`${index}-${part}`"
+			aria-hidden="true"
+			class="rounded-md border border-solid border-surface-4 bg-surface-3 px-2 py-0.5 font-mono text-sm text-[var(--color-text-primary)]"
+		>
+			{{ part }}
+		</kbd>
+		<span class="sr-only">{{ text }}</span>
+	</span>
+</template>
+
+<script setup lang="ts">
+import { useBindingParts, useBindingText } from '../../composables/use-keybinding-labels'
+import type { KeyBinding } from '../../utils/keybinding'
+
+const props = defineProps<{ binding: KeyBinding }>()
+
+const parts = useBindingParts(() => props.binding)
+const text = useBindingText(() => props.binding)
+</script>

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'