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.

app/src/main/java/com/rtbishop/look4sat/MainScreen.kt

@@ -135,8 +135,12 @@ fun MainScreen(navigateToRadar: () -> Unit = {}) {
     val container = (context.applicationContext as IContainerProvider).getMainContainer()
     val trackingState by container.radioTrackingService.state.collectAsStateWithLifecycle()
     val otherSettings by container.settingsRepo.otherSettings.collectAsStateWithLifecycle()
-    // UI 设置: 按 hiddenScreens 过滤导航项(顺序固定, 关闭项自动靠拢; 设置页固定保留)
+    // UI 设置: 按 screenOrder 排序(空 = 默认顺序), 再按 hiddenScreens 过滤(设置页固定保留)
     val navItems = listOf(Screen.Satellites, Screen.Passes, Screen.Radar, Screen.Mutual, Screen.Roaming, Screen.Map, Screen.Settings)
+        .sortedBy { screen ->
+            val idx = otherSettings.screenOrder.indexOf(screen.screenId)
+            if (idx == -1) Int.MAX_VALUE else idx
+        }
         .filter { it.screenId !in otherSettings.hiddenScreens || it is Screen.Settings }
     // Activity-scoped so the mutual query results survive navigation to Radar and back
     val mutualViewModel: MutualViewModel = viewModel(