feat(wavelog): 二选一互斥模式 + p12 空密码导入修复（4.4.8-ba7opf.9.4, 569）

- LoTW/Wavelog 互斥：isReady 即 Wavelog 模式，LoTW 卡置灰+说明，上传按模式分流（雷达页/日志本），自动 LoTW 同步门控；配置切换弹警告、可清除配置
- 同步重做：get_contacts_adif 每台址游标，增量/全量双按钮，只增不删，URL 变更增量降级全量；同步刷新日志本+地图 workedGrids/gridQsos/roamedGrids
- 日志本台址选择器（全部/各台址）+ Wavelog 上传预览弹窗；Qso 增 wavelogStation，DB v4→v5
- 删旧 WavelogRepository/wavelogSettings 链路，换 WavelogSyncRepository + WavelogSync 纯函数
- p12 修复：导入按钮放开空密码（isEnabled=!busy）+ 密码框留空提示；Pkcs12ReaderTest +4 用例
- 单测六模块全绿；版本 4.4.8-ba7opf.9.4 (569)

feature/map/src/main/java/com/rtbishop/look4sat/feature/map/MapViewModel.kt

@@ -94,22 +94,11 @@ class MapViewModel(
             }
         }
         viewModelScope.launch {
-            settingsRepo.wavelogSettings.collectLatest { _ ->
-                val workedGrids = settingsRepo.getWorkedGrids()
-                val markedGrids = settingsRepo.getMarkedGridStations()
-                // Marked stations auto-clear once their grid becomes worked:
-                // the reminder has served its purpose (user req: 网格变绿后标记自动清除).
-                val stale = markedGrids.keys.filter { it in workedGrids }
-                val activeMarks = if (stale.isEmpty()) markedGrids else markedGrids - stale.toSet()
-                if (stale.isNotEmpty()) settingsRepo.setMarkedGridStations(activeMarks)
-                _uiState.update {
-                    it.copy(
-                        workedGrids = workedGrids,
-                        workedGridQsos = settingsRepo.getWorkedGridQsos(),
-                        roamedGrids = settingsRepo.getRoamedGrids(),
-                        markedGrids = activeMarks
-                    )
-                }
+            // Grid + mark data reloads whenever the screen becomes visible (and once at
+            // init): the LoTW/Wavelog syncs run from Settings or the app start, so
+            // re-entering the map picks their results up.
+            isScreenVisible.collect { visible ->
+                if (visible) refreshMapGridData()
             }
         }
         val (selectedCatNum, _) = satelliteRepo.selectedPass.value
@@ -117,6 +106,25 @@ class MapViewModel(
         getStationPosition()
     }
 
+    /** Loads the worked-grid / mark data into the map state (see the visibility collector). */
+    private fun refreshMapGridData() {
+        val workedGrids = settingsRepo.getWorkedGrids()
+        val markedGrids = settingsRepo.getMarkedGridStations()
+        // Marked stations auto-clear once their grid becomes worked:
+        // the reminder has served its purpose (user req: 网格变绿后标记自动清除).
+        val stale = markedGrids.keys.filter { it in workedGrids }
+        val activeMarks = if (stale.isEmpty()) markedGrids else markedGrids - stale.toSet()
+        if (stale.isNotEmpty()) settingsRepo.setMarkedGridStations(activeMarks)
+        _uiState.update {
+            it.copy(
+                workedGrids = workedGrids,
+                workedGridQsos = settingsRepo.getWorkedGridQsos(),
+                roamedGrids = settingsRepo.getRoamedGrids(),
+                markedGrids = activeMarks
+            )
+        }
+    }
+
     fun onAction(action: MapAction) {
         when (action) {
             MapAction.SelectPrev -> scrollSelection(true)