feat: Browser autofill support for login form (#521)

* fix: add name and autocomplete attributes to auth form inputs

Password managers (1Password, Bitwarden, etc.) rely on the HTML `name`
and `autocomplete` attributes to detect and fill credential fields.
The login and setup forms were missing both, preventing password managers
from offering autofill.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* docs: add JSDoc docstrings to auth form components

Adds JSDoc comments to all exported functions and the internal
validateSetupForm helper in the auth form files, bringing docstring
coverage above the 80% threshold required by CodeRabbit.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix: explicitly set name props on SetupForm credential inputs

The three AuthInputField calls in SetupForm were relying on the
id-to-name fallback (name={name ?? id}) inside AuthInputField.
Adding explicit name props makes the password-manager contract
self-contained in SetupForm and resilient to future id changes.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Benjamin <1159333+benjaminburzan@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/auth/view/LoginForm.tsx

@@ -16,6 +16,11 @@ const initialState: LoginFormState = {
   password: '',
 };
 
+/**
+ * Login form component.
+ * Handles credential input with browser autofill support (`autocomplete`
+ * attributes) so that password managers can offer to fill saved credentials.
+ */
 export default function LoginForm() {
   const { t } = useTranslation('auth');
   const { login } = useAuth();
@@ -63,6 +68,7 @@ export default function LoginForm() {
           onChange={(value) => updateField('username', value)}
           placeholder={t('login.placeholders.username')}
           isDisabled={isSubmitting}
+          autoComplete="username"
         />
 
         <AuthInputField
@@ -73,6 +79,7 @@ export default function LoginForm() {
           placeholder={t('login.placeholders.password')}
           isDisabled={isSubmitting}
           type="password"
+          autoComplete="current-password"
         />
 
         <AuthErrorAlert errorMessage={errorMessage} />