improvements

lib/extensions/snackbar.dart

@@ -51,6 +51,16 @@ extension ShowSnackBar on BuildContext {
     );
   }
 
+  void showLongErrorSnackBar({
+    required final String message,
+  }) {
+    showSnackBar(
+      message: message,
+      backgroundColor: Colors.red,
+      duration: const Duration(seconds: 6),
+    );
+  }
+
   void showSuccessSnackBar({
     required final String message,
   }) {

lib/screens/login_screen.dart

@@ -63,7 +63,7 @@ class _LoginScreenState extends AuthState<LoginScreen> with Loadable {
         await _signIn();
       } catch (error) {
         if (mounted) {
-          context.showErrorSnackBar(message: error.toString());
+          context.showLongErrorSnackBar(message: 'Invalid password or email');
 
           emailController.clear();
           passwordController.clear();
@@ -100,19 +100,26 @@ class _LoginScreenState extends AuthState<LoginScreen> with Loadable {
               'Sign in to your account. If you do not have one already, we will automatically set up one for you.',
             ),
             const SizedBox(height: MEDIUM_SPACE),
-            TextFormField(
+            TextField(
               controller: emailController,
               autofocus: true,
               autofillHints: const [AutofillHints.email],
-              decoration: const InputDecoration(labelText: 'Email'),
+              keyboardType: TextInputType.emailAddress,
+              textInputAction: TextInputAction.next,
+              decoration: const InputDecoration(
+                labelText: 'Email',
+                prefixIcon: Icon(Icons.email),
+              ),
             ),
             const SizedBox(height: SMALL_SPACE),
-            TextFormField(
+            TextField(
               obscureText: true,
               controller: passwordController,
               decoration: const InputDecoration(
                 labelText: 'Password',
+                prefixIcon: Icon(Icons.lock),
               ),
+              onSubmitted: (value) => callWithLoading(signIn),
             ),
             const SizedBox(height: MEDIUM_SPACE),
             ElevatedButton.icon(

lib/screens/main_screen.dart

@@ -121,6 +121,10 @@ class _MainScreenState extends AuthRequiredState<MainScreen> with Loadable {
 
     await previousCameraController?.dispose();
 
+    if (!mounted) {
+      return;
+    }
+
     controller = cameraController;
 
     // Update UI if controller updates