fix: plusieurs retours UX/UI (#58)

| Numéro du ticket | Titre du ticket |
|------------------|-----------------|
|                  |                 |

## Description de la PR

## Modification du .env

## Check list

- [ ] Pas de régression
- [ ] TU/TI/TF rédigée
- [ ] TU/TI/TF OK
- [ ] CHANGELOG modifié

---------

Co-authored-by: THOLOT DECHENE Matthieu <matthieu@yuno.malio.fr>
Co-authored-by: matthieu <matthieu@yuno.malio.fr>
Reviewed-on: #58
Co-authored-by: tristan <tristan@yuno.malio.fr>
Co-committed-by: tristan <tristan@yuno.malio.fr>

app/components/malio/input/InputPhone.test.ts

@@ -298,6 +298,41 @@ describe('MalioInputPhone', () => {
     expect(wrapper.get('input').classes()).toContain('!pr-10')
   })
 
+  it('shows default add button color when empty and unfocused', () => {
+    const wrapper = mountComponent({addable: true})
+
+    expect(wrapper.get('[data-test="add-button"]').classes()).toContain('text-m-muted')
+    expect(wrapper.get('[data-test="add-button"]').classes()).not.toContain('text-m-primary')
+  })
+
+  it('shows primary add button color on focus', async () => {
+    const wrapper = mountComponent({addable: true})
+
+    await wrapper.get('input').trigger('focus')
+
+    expect(wrapper.get('[data-test="add-button"]').classes()).toContain('text-m-primary')
+  })
+
+  it('shows black add button color when filled and unfocused', () => {
+    const wrapper = mountComponent({addable: true, modelValue: '+33612345678'})
+
+    expect(wrapper.get('[data-test="add-button"]').classes()).toContain('text-black')
+  })
+
+  it('error overrides focus color on add button', async () => {
+    const wrapper = mountComponent({addable: true, error: 'Numéro invalide'})
+
+    await wrapper.get('input').trigger('focus')
+
+    expect(wrapper.get('[data-test="add-button"]').classes()).toContain('text-m-danger')
+  })
+
+  it('success applies to add button', () => {
+    const wrapper = mountComponent({addable: true, success: 'Numéro valide'})
+
+    expect(wrapper.get('[data-test="add-button"]').classes()).toContain('text-m-success')
+  })
+
   it('applies mask via maska directive', async () => {
     const wrapper = mountComponent({mask: '+## # ## ## ## ##'})