fix(gps,data): official-code fixes - real GPS result callback, no fake update success (4.5.2, release pending)

Official code issues found during review (user-reported):
1. GPS "success" was shown instantly even when no fix was obtained:
   - setStationPosition() always returned true (permissions exception
     swallowed, async requestLocationUpdates without waiting)
   - now: suspend + LocationManagerCompat.getCurrentLocation (GPS
     first, network fallback), permission check upfront, 15s timeout,
     success only when onLocationChanged fires; SettingsRepo takes
     Context for the permission check; ViewModel waits for the real
     result and shows "Unable to get location - check permission and
     GPS/network signal" on failure (4 locales)
2. Data update faked success on total failure:
   - updateFromRemote now counts successful sources; 0 success throws
     IOException -> timestamp NOT refreshed, Toast "Update failed -
     check your network" (4 locales, new IShowToast resId overload)
   - OkHttp timeouts widened: connect 15s / read 20s / write 20s

Verified: check_strings OK; all modules compile.
Release intentionally NOT triggered (user: fix everything first, then
one release).

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/repository/ISettingsRepo.kt

@@ -45,7 +45,8 @@ interface ISettingsRepo {
     //region # Station position settings
     val stationPosition: StateFlow<GeoPos>
     fun setStationPosition(latitude: Double, longitude: Double, altitude: Double): Boolean
-    fun setStationPosition(): Boolean
+    /** GPS 定位(挂起): 拿到位置才返回 true; 权限缺失/超时/无信号返回 false */
+    suspend fun setStationPosition(): Boolean
     fun setStationPosition(locator: String): Boolean
     //endregion
 

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/usecase/IShowToast.kt

@@ -19,4 +19,7 @@ package com.rtbishop.look4sat.core.domain.usecase
 
 interface IShowToast {
     operator fun invoke(message: String)
+
+    /** 按资源 ID 显示(四语文案) */
+    operator fun invoke(resId: Int)
 }