feat: add clear logs with confirmation dialog and fix DB dispatchers

- Add clearLogs method to BridgeModule with proper coroutine scope
- Fix fetchLogs and clearLogs using Thread+runBlocking which caused app close
- Change serviceScope from Dispatchers.Main to Dispatchers.IO
- Add error logging in fetchLogs for better diagnostics
- Add clear logs button with confirmation dialog in StatusScreen

lib/status_screen.dart

@@ -48,6 +48,45 @@ class _StatusScreenState extends State<StatusScreen> {
   }
 
   Future<void> _clearLogs() async {
+    final confirmed = await showDialog<bool>(
+      context: context,
+      builder: (ctx) => AlertDialog(
+        backgroundColor: const Color(0xFF1e1e1e),
+        title: const Text(
+          'Clear Event Logs',
+          style: TextStyle(fontFamily: 'monospace', color: Color(0xFFe0e0e0)),
+        ),
+        content: const Text(
+          'This will permanently delete all logged events. Continue?',
+          style: TextStyle(fontFamily: 'monospace', color: Color(0xFF9e9e9e)),
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(ctx, false),
+            child: const Text(
+              'CANCEL',
+              style: TextStyle(
+                fontFamily: 'monospace',
+                color: Color(0xFF616161),
+              ),
+            ),
+          ),
+          TextButton(
+            onPressed: () => Navigator.pop(ctx, true),
+            child: const Text(
+              'CLEAR',
+              style: TextStyle(
+                fontFamily: 'monospace',
+                color: Color(0xFFff5252),
+              ),
+            ),
+          ),
+        ],
+      ),
+    );
+
+    if (confirmed != true) return;
+
     final result = await LocationBridge.clearLogs();
     if (mounted) {
       if (result >= 0) {