fix: Autofillhints on readonly

lib/views/login.dart

@@ -180,7 +180,7 @@ class _LoginState extends State<Login> {
                 autofocus: true,
                 onChanged: (t) => _checkWellKnownWithCoolDown(t, context),
                 controller: usernameController,
-                autofillHints: [AutofillHints.username],
+                autofillHints: loading ? null : [AutofillHints.username],
                 decoration: InputDecoration(
                     prefixIcon: Icon(Icons.account_box_outlined),
                     hintText:
@@ -194,7 +194,7 @@ class _LoginState extends State<Login> {
               child: TextField(
                 readOnly: loading,
                 autocorrect: false,
-                autofillHints: [AutofillHints.password],
+                autofillHints: loading ? null : [AutofillHints.password],
                 controller: passwordController,
                 obscureText: !showPassword,
                 onSubmitted: (t) => login(context),

lib/views/sign_up.dart

@@ -92,10 +92,11 @@ class _SignUpState extends State<SignUp> {
             Padding(
               padding: const EdgeInsets.symmetric(horizontal: 12.0),
               child: TextField(
+                readOnly: loading,
                 autocorrect: false,
                 controller: usernameController,
                 onSubmitted: (s) => signUpAction(context),
-                autofillHints: [AutofillHints.newUsername],
+                autofillHints: loading ? null : [AutofillHints.newUsername],
                 decoration: InputDecoration(
                   prefixIcon: Icon(Icons.account_circle_outlined),
                   hintText: L10n.of(context).username,

lib/views/sign_up_password.dart

@@ -148,9 +148,10 @@ class _SignUpPasswordState extends State<SignUpPassword> {
               controller: passwordController,
               obscureText: !showPassword,
               autofocus: true,
+              readOnly: loading,
               autocorrect: false,
               onSubmitted: (t) => _signUpAction(context),
-              autofillHints: [AutofillHints.newPassword],
+              autofillHints: loading ? null : [AutofillHints.newPassword],
               decoration: InputDecoration(
                   prefixIcon: Icon(Icons.lock_outlined),
                   hintText: '****',