Dispatch log callbacks to main thread

Move allLogs/bufferedLogs mutations in appendLogs, clearLogs,
and setDefaultLogLevel into viewModelScope.launch(Dispatchers.Main)
to avoid concurrent iteration from the search debounce flow.

app/src/main/java/io/nekohasekai/sfa/compose/screen/log/LogViewModel.kt

@@ -81,16 +81,20 @@ class LogViewModel :
 
     override fun setDefaultLogLevel(level: Int) {
         val logLevel = LogLevel.entries.find { it.priority == level } ?: error("Unknown log level: $level")
+        viewModelScope.launch(Dispatchers.Main) {
             _uiState.update { it.copy(defaultLogLevel = logLevel) }
             updateDisplayedLogs()
         }
+    }
 
     override fun clearLogs() {
+        viewModelScope.launch(Dispatchers.Main) {
             allLogs.clear()
             bufferedLogs.clear()
             _uiState.update { it.copy(isPaused = false) }
             updateDisplayedLogs()
         }
+    }
 
     override fun requestClearLogs() {
         viewModelScope.launch {
@@ -104,6 +108,7 @@ class LogViewModel :
 
     override fun appendLogs(message: List<LogEntry>) {
         val processedLogs = message.map { processLogEntry(it) }
+        viewModelScope.launch(Dispatchers.Main) {
             if (_uiState.value.isPaused) {
                 bufferedLogs.addAll(processedLogs)
             } else {
@@ -124,6 +129,7 @@ class LogViewModel :
                 }
             }
         }
+    }
 
     override fun togglePause() {
         val currentState = _uiState.value