feat: 偏好设置小部件支持位置选择与拖拽排序

- 顶栏各小部件按钮支持选择位置（header/user-dropdown/none），偏好设置按钮额外保留 auto/fixed 智能兜底，移动端/全屏内容模式下自动切 fixed 浮动保命，避免偏好入口死锁
- draggable-list.vue 的 listRef 未在模板绑定，Sortable 永不初始化导致小部件无法拖拽；加 ref 绑定与 data-key 让 onEnd 从 DOM 读真实新顺序
- preferences.ts 的 updatePreferences 用 defu(merge) 合并数组，对 widget.order 是 concat 语义，每次拖拽触发更新都会把当前 order 追加一次，localStorage 里膨胀到上百条；改用 mergeWithArrayOverride 整体替换，加载缓存时 sanitizeCachedArray 去重已存在的脏数据
- preferences 按钮之前在 widget.order 里因 labelMap 未登记显示成裸字符串，且 widgetChecks 缺 refresh 导致刷新按钮不按 order 渲染；统一 preferences 与其它 widget 的拖拽排序与位置 select，refresh 补进 rightSlots.widgetChecks 并补模板渲染
- 补 sortablejs 依赖、WidgetPreferences.order 类型字段、preferences-drawer.vue 的 widgetOrder 绑定

packages/locales/src/langs/en-US/common.json

@@ -21,5 +21,6 @@
   "yes": "Yes",
   "no": "No",
   "showSearchPanel": "Show search panel",
-  "hideSearchPanel": "Hide search panel"
+  "hideSearchPanel": "Hide search panel",
+  "notShow": "Don't Show"
 }

packages/locales/src/langs/en-US/preferences.json

@@ -193,14 +193,26 @@
   "widget": {
     "title": "Widget",
     "globalSearch": "Enable Global Search",
+    "globalSearchPosition": "Global Search Position",
     "fullscreen": "Enable Fullscreen",
+    "fullscreenPosition": "Fullscreen Position",
     "themeToggle": "Enable Theme Toggle",
+    "themeTogglePosition": "Theme Toggle Position",
     "languageToggle": "Enable Language Toggle",
+    "languageTogglePosition": "Language Toggle Position",
     "notification": "Enable Notification",
+    "notificationPosition": "Notification Position",
     "sidebarToggle": "Enable Sidebar Toggle",
     "lockScreen": "Enable Lock Screen",
+    "lockScreenPosition": "Lock Screen Button Position",
+    "logoutButtonPosition": "Logout Button Position",
+    "header": "Header",
+    "userDropdown": "User Dropdown",
+    "hidden": "Hidden",
     "refresh": "Enable Refresh",
-    "timezone": "Enable Timezone"
+    "refreshPosition": "Refresh Position",
+    "timezone": "Enable Timezone",
+    "timezonePosition": "Timezone Position"
   },
   "antd": {
     "tabLabel": "Antd Extension",

packages/locales/src/langs/zh-CN/common.json

@@ -21,5 +21,6 @@
   "yes": "是",
   "no": "否",
   "showSearchPanel": "显示搜索面板",
-  "hideSearchPanel": "隐藏搜索面板"
+  "hideSearchPanel": "隐藏搜索面板",
+  "notShow": "不显示"
 }

packages/locales/src/langs/zh-CN/preferences.json

@@ -193,14 +193,26 @@
   "widget": {
     "title": "小部件",
     "globalSearch": "启用全局搜索",
+    "globalSearchPosition": "全局搜索位置",
     "fullscreen": "启用全屏",
+    "fullscreenPosition": "全屏按钮位置",
     "themeToggle": "启用主题切换",
+    "themeTogglePosition": "主题切换位置",
     "languageToggle": "启用语言切换",
+    "languageTogglePosition": "语言切换位置",
     "notification": "启用通知",
+    "notificationPosition": "通知位置",
     "sidebarToggle": "启用侧边栏切换",
     "lockScreen": "启用锁屏",
+    "lockScreenPosition": "锁屏按钮位置",
+    "logoutButtonPosition": "退出按钮位置",
+    "header": "顶栏",
+    "userDropdown": "用户下拉窗",
+    "hidden": "已隐藏",
     "refresh": "启用刷新",
-    "timezone": "启用时区"
+    "refreshPosition": "刷新按钮位置",
+    "timezone": "启用时区",
+    "timezonePosition": "时区按钮位置"
   },
   "antd": {
     "tabLabel": "Antd 拓展",