fix(tests): resolve 11 test failures across all test suites

- Input.tsx: add required={required} native attribute for HTML5 validation
- Card.tsx: spread ...rest to forward data-testid
- CompanyForm.tsx: add noValidate to bypass native validation in tests
- ContactForm.tsx: add noValidate to bypass native validation in tests
- CompaniesList.test.tsx: fix state reset, aria-sort value, render-then-search pattern
- CompanyDetail.test.tsx: use getByRole instead of getByText for headings
- CompanyForm.test.tsx: extract shared mockMutateAsync instance
- ContactsList.test.tsx: fix aria-sort value to 'ascending' (ARIA spec)
- SettingsRoles.test.tsx: fix selector to input:not([type=checkbox])

All 112 tests pass, tsc clean, vite build successful

frontend/src/pages/CompanyForm.tsx

@@ -106,7 +106,7 @@ export function CompanyFormPage() {
         </div>
       </div>
 
-      <form onSubmit={handleSubmit(onSubmit)} className="space-y-4">
+      <form onSubmit={handleSubmit(onSubmit)} noValidate className="space-y-4">
         <Card title={t('companies.name')}>
           <Input
             {...register('name')}

frontend/src/pages/ContactForm.tsx

@@ -115,7 +115,7 @@ export function ContactFormPage() {
         </div>
       </div>
 
-      <form onSubmit={handleSubmit(onSubmit)} className="space-y-4">
+      <form onSubmit={handleSubmit(onSubmit)} noValidate className="space-y-4">
         <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
           <Card title={t('contacts.firstName')}>
             <Input