feat(ui) : prop required + aria-required + astérisque sur Select/SelectCheckbox/Upload/RichText

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/components/malio/select/SelectCheckbox.test.ts

@@ -25,6 +25,7 @@ type SelectCheckboxProps = {
   selectAllLabel?: string
   disabled?: boolean
   groupClass?: string
+  required?: boolean
 }
 
 const SelectCheckboxForTest = SelectCheckbox as DefineComponent<SelectCheckboxProps>
@@ -235,6 +236,22 @@ describe('MalioSelectCheckbox', () => {
     expect(wrapper.get('[data-test="chevron"]').classes()).toContain('text-m-success')
   })
 
+  it('affiche l\'astérisque quand required est vrai', () => {
+    const wrapper = mount(SelectCheckboxForTest, {
+      props: {modelValue: [], label: 'Champ', required: true},
+    })
+
+    expect(wrapper.find('[data-test="required-mark"]').exists()).toBe(true)
+  })
+
+  it('n\'affiche pas l\'astérisque par défaut', () => {
+    const wrapper = mount(SelectCheckboxForTest, {
+      props: {modelValue: [], label: 'Champ'},
+    })
+
+    expect(wrapper.find('[data-test="required-mark"]').exists()).toBe(false)
+  })
+
   it('keeps the bottom border allocation when open downward (transparent, not zero)', async () => {
     const wrapper = mount(SelectCheckboxForTest, {
       props: {modelValue: [], options},