add autofill hints for source page

lib/app/pages/source_page.dart

@@ -41,6 +41,7 @@ class SourcePage extends HookConsumerWidget {
       label: l.settingsServersFieldsAddress,
       initialValue: source?.address.toString(),
       keyboardType: TextInputType.url,
+      autofillHints: const [AutofillHints.url],
       required: true,
       validator: (value, label) {
         if (Uri.tryParse(value!) == null) {
@@ -52,12 +53,14 @@ class SourcePage extends HookConsumerWidget {
     final username = LabeledTextField(
       label: l.settingsServersFieldsUsername,
       initialValue: source?.username,
+      autofillHints: const [AutofillHints.username],
       required: true,
     );
     final password = LabeledTextField(
       label: l.settingsServersFieldsPassword,
       initialValue: source?.password,
       obscureText: true,
+      autofillHints: const [AutofillHints.password],
       required: true,
     );
 
@@ -175,6 +178,7 @@ class SourcePage extends HookConsumerWidget {
         ),
         body: Form(
           key: form,
+          child: AutofillGroup(
             child: ListView(
               children: [
                 const SizedBox(height: 96 - kToolbarHeight),
@@ -198,6 +202,7 @@ class SourcePage extends HookConsumerWidget {
             ),
           ),
         ),
+      ),
     );
   }
 }
@@ -208,6 +213,7 @@ class LabeledTextField extends HookConsumerWidget {
   final bool obscureText;
   final bool required;
   final TextInputType? keyboardType;
+  final Iterable<String>? autofillHints;
   final String? Function(String? value, String label)? validator;
 
   // ignore: prefer_const_constructors_in_immutables
@@ -218,6 +224,7 @@ class LabeledTextField extends HookConsumerWidget {
     this.obscureText = false,
     this.keyboardType,
     this.validator,
+    this.autofillHints,
     this.required = false,
   });
 
@@ -249,6 +256,7 @@ class LabeledTextField extends HookConsumerWidget {
             controller: _controller,
             obscureText: obscureText,
             keyboardType: keyboardType,
+            autofillHints: autofillHints,
             validator: (value) {
               String? error;