Merge pull request #217 from MeshEnvy/chrome/main

enh: Chrome compatibility

lib/screens/chrome_required_screen.dart

@@ -0,0 +1,89 @@
+import 'package:flutter/material.dart';
+import '../l10n/l10n.dart';
+
+class ChromeRequiredScreen extends StatelessWidget {
+  const ChromeRequiredScreen({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    final l10n = context.l10n;
+    final theme = Theme.of(context);
+    final isDark = theme.brightness == Brightness.dark;
+
+    return Scaffold(
+      body: Container(
+        width: double.infinity,
+        padding: const EdgeInsets.symmetric(horizontal: 32),
+        decoration: BoxDecoration(
+          gradient: LinearGradient(
+            begin: Alignment.topLeft,
+            end: Alignment.bottomRight,
+            colors: isDark
+                ? [const Color(0xFF1A1A1A), const Color(0xFF0D0D0D)]
+                : [const Color(0xFFF5F7FA), const Color(0xFFE4E7EB)],
+          ),
+        ),
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: [
+            Container(
+              padding: const EdgeInsets.all(24),
+              decoration: BoxDecoration(
+                color: Colors.orange.withValues(alpha: 0.1),
+                shape: BoxShape.circle,
+              ),
+              child: const Icon(
+                Icons.browser_not_supported_rounded,
+                size: 80,
+                color: Colors.orange,
+              ),
+            ),
+            const SizedBox(height: 32),
+            Text(
+              l10n.scanner_chromeRequired,
+              textAlign: TextAlign.center,
+              style: theme.textTheme.headlineMedium?.copyWith(
+                fontWeight: FontWeight.bold,
+                color: isDark ? Colors.white : Colors.black87,
+              ),
+            ),
+            const SizedBox(height: 16),
+            Text(
+              l10n.scanner_chromeRequiredMessage,
+              textAlign: TextAlign.center,
+              style: theme.textTheme.bodyLarge?.copyWith(
+                color: isDark ? Colors.white70 : Colors.black54,
+                height: 1.5,
+              ),
+            ),
+            const SizedBox(height: 48),
+            // We can't really "fix" it for them other than telling them to use Chrome
+            // but we can provide a nice visual.
+            Container(
+              padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 12),
+              decoration: BoxDecoration(
+                color: Colors.blue.withValues(alpha: 0.1),
+                borderRadius: BorderRadius.circular(30),
+                border: Border.all(color: Colors.blue.withValues(alpha: 0.3)),
+              ),
+              child: Row(
+                mainAxisSize: MainAxisSize.min,
+                children: [
+                  const Icon(Icons.info_outline, size: 20, color: Colors.blue),
+                  const SizedBox(width: 12),
+                  Text(
+                    "Web Bluetooth requires a Chromium browser",
+                    style: theme.textTheme.bodyMedium?.copyWith(
+                      color: Colors.blue,
+                      fontWeight: FontWeight.w500,
+                    ),
+                  ),
+                ],
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/screens/scanner_screen.dart

@@ -1,7 +1,6 @@
 import 'dart:async';
-import 'dart:io' show Platform;
-
 import 'package:flutter/material.dart';
+import '../utils/platform_info.dart';
 import 'package:flutter_blue_plus/flutter_blue_plus.dart';
 import 'package:provider/provider.dart';
 
@@ -46,17 +45,22 @@ class _ScannerScreenState extends State<ScannerScreen> {
 
     connector.addListener(_connectionListener);
 
-    _bluetoothStateSubscription = FlutterBluePlus.adapterState.listen((state) {
-      if (mounted) {
-        setState(() {
-          _bluetoothState = state;
-        });
-        // Cancel scan if Bluetooth turns off while scanning
-        if (state != BluetoothAdapterState.on) {
-          unawaited(connector.stopScan());
+    _bluetoothStateSubscription = FlutterBluePlus.adapterState.listen(
+      (state) {
+        if (mounted) {
+          setState(() {
+            _bluetoothState = state;
+          });
+          // Cancel scan if Bluetooth turns off while scanning
+          if (state != BluetoothAdapterState.on) {
+            unawaited(connector.stopScan());
+          }
         }
-      }
-    });
+      },
+      onError: (Object e) {
+        debugPrint("Scanner adapterState stream error: $e");
+      },
+    );
   }
 
   @override
@@ -108,7 +112,11 @@ class _ScannerScreenState extends State<ScannerScreen> {
                     if (isScanning) {
                       connector.stopScan();
                     } else {
-                      connector.startScan();
+                      unawaited(
+                        connector.startScan().catchError((e) {
+                          debugPrint("Scanner screen startScan error: $e");
+                        }),
+                      );
                     }
                   },
             icon: isScanning
@@ -265,7 +273,7 @@ class _ScannerScreenState extends State<ScannerScreen> {
               ],
             ),
           ),
-          if (Platform.isAndroid)
+          if (PlatformInfo.isAndroid)
             TextButton(
               onPressed: () => FlutterBluePlus.turnOn(),
               child: Text(context.l10n.scanner_enableBluetooth),