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/data/src/main/java/com/rtbishop/look4sat/core/data/repository/SettingsRepo.kt

@@ -78,6 +78,7 @@ class SettingsRepo(
     private val keyStateOfLightTheme = "stateOfLightTheme"
     private val keyStateOfNightMode = "stateOfNightMode"
     private val keyHiddenScreens = "hiddenScreens"
+    private val keyScreenOrder = "screenOrder"
     private val keyStationAltitude = "stationAltitude"
     private val keyStationLatitude = "stationLatitude"
     private val keyStationLongitude = "stationLongitude"
@@ -359,6 +360,7 @@ class SettingsRepo(
                 putLong(keyLowElevation, new.lowElevation.toRawBits())
                 putLong(keyHighElevation, new.highElevation.toRawBits())
                 putStringSet(keyHiddenScreens, new.hiddenScreens.toSet())
+                putString(keyScreenOrder, new.screenOrder.joinToString(","))
             }
             new
         }
@@ -375,6 +377,7 @@ class SettingsRepo(
         shouldSeeWhatsNew = preferences.getBoolean(keyShouldSeeWhatsNew, true),
         sstvMode = preferences.getString(keySstvMode, null) ?: "Auto",
         hiddenScreens = preferences.getStringSet(keyHiddenScreens, emptySet())?.toList() ?: emptyList(),
+        screenOrder = preferences.getString(keyScreenOrder, null)?.split(",")?.filter { it.isNotBlank() } ?: emptyList(),
         lowElevation = Double.fromBits(preferences.getLong(keyLowElevation, 15.0.toRawBits())),
         highElevation = Double.fromBits(preferences.getLong(keyHighElevation, 45.0.toRawBits()))
     )