feat(settings): drag-to-reorder page order in UI Settings card

Users can now change the bottom navigation order (previously fixed):

- New "Page order" section under the Settings toggle in the UI
  Settings card: vertical list of all 7 pages, each with a drag
  handle (new ic_drag drawable, Material drag_indicator glyph) on
  the right.
- Drag a handle up/down: the item follows the finger with live
  swap + animateItem() placement animation; on release the order is
  persisted (OtherSettings.screenOrder, comma-separated in prefs so
  order survives; StringSet would not).
- "Reset order" button restores the default order
  (Satellites/Passes/Radar/Mutual/Roaming/Map/Settings).
- MainScreen now sorts navItems by screenOrder (empty = default,
  stable sort keeps the canonical order); hiddenScreens filtering
  unchanged; Settings entry always visible.
- New strings prefs_ui_order_title / prefs_ui_order_reset in
  en/zh/tr; What's-new updated in all three locales.

Version stays 4.4.9 (覆盖 per user). Verified: core:data tests
pass, settings + app compile.

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/model/Settings.kt

@@ -64,7 +64,9 @@ data class OtherSettings(
     val lowElevation: Double = 15.0,
     val highElevation: Double = 45.0,
     // UI 设置: 底部导航栏隐藏的页面(Screen simpleName 列表, 默认空 = 全部显示)
-    val hiddenScreens: List<String> = emptyList()
+    val hiddenScreens: List<String> = emptyList(),
+    // UI 设置: 页面顺序(空 = 默认顺序: 卫星/过境/雷达/匹配/漫游/地图/设置)
+    val screenOrder: List<String> = emptyList()
 )
 
 data class DataSourcesSettings(