Confirm xmrig startup before reporting failure

lib/state/mining_controller.dart

@@ -69,10 +69,11 @@ class MiningController extends StateNotifier<MiningState> {
     return _runAction(() async {
       final config = _buildLaunchConfig();
       final started = await _service.start(config: config);
-      if (!started) {
+      await refresh();
+      final confirmed = await _confirmRunning(config);
+      if (!started && !confirmed) {
         throw StateError('Failed to start miner');
       }
-      await refresh();
       return true;
     });
   }
@@ -93,10 +94,11 @@ class MiningController extends StateNotifier<MiningState> {
     return _runAction(() async {
       final config = _buildLaunchConfig();
       final restarted = await _service.restart(config: config);
-      if (!restarted) {
+      await refresh();
+      final confirmed = await _confirmRunning(config);
+      if (!restarted && !confirmed) {
         throw StateError('Failed to restart miner');
       }
-      await refresh();
       return true;
     });
   }
@@ -141,6 +143,19 @@ class MiningController extends StateNotifier<MiningState> {
     }
   }
 
+  Future<bool> _confirmRunning(MinerLaunchConfig config) async {
+    for (var i = 0; i < 6; i++) {
+      final running = await _service.isRunning(config: config);
+      if (running) {
+        final summary = await _service.fetchSummary(config: config);
+        state = state.copyWith(running: true, summary: summary, error: null);
+        return true;
+      }
+      await Future.delayed(const Duration(milliseconds: 500));
+    }
+    return false;
+  }
+
   MinerLaunchConfig? _tryBuildLaunchConfig() {
     try {
       return _buildLaunchConfig();