feat(heures) : calendrier des jours validés (vue Jour) + harmonisation Malio UI

- Calendrier MalioDate en vue Jour (Heures + Heures Conducteurs) : jours
  entièrement validés (admin) peints en vert. Endpoint GET
  /work-hours/validation-status?from=&to=[&driver=1] (scope conducteur inversé),
  chargement à la volée par mois, refresh après validation/saisie/absence.
- Suite à @malio/layer-ui 1.7.11 : reserveMessageSpace=false sur les champs ;
  tous les drawers migrés sur MalioDrawer (titre via slot #header, AppDrawer
  custom supprimé) ; boutons d'action en MalioButton (deux boutons partagent
  l'espace) ; inputs date en MalioDate ; MalioDateWeek en vue Semaine.
- Boutons d'ajout uniformisés sur « Ajouter » + icône.
- .env : EXCLUDED_PUBLIC_HOLIDAYS="null".
- Doc : doc/hours-validated-days.md, documentation-content.ts, CLAUDE.md.

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

frontend/components/employees/ContractTab.vue

@@ -43,7 +43,10 @@
       </button>
     </div>
 
-    <AppDrawer :model-value="isContractDrawerOpen" title="Modifier le contrat" @update:model-value="onUpdateContractDrawerOpen">
+    <MalioDrawer :model-value="isContractDrawerOpen" @update:model-value="onUpdateContractDrawerOpen">
+      <template #header>
+          <h2 class="text-[32px] font-semibold text-primary-500">Modifier le contrat</h2>
+      </template>
       <div class="mb-4 flex border-b border-neutral-200">
           <button
               type="button"
@@ -141,13 +144,12 @@
         </div>
 
         <div class="flex justify-center pt-2">
-          <button
-            type="submit"
-            class="flex w-[200px] items-center justify-center gap-2 rounded-md bg-primary-500 px-4 py-2 text-md font-semibold text-white hover:bg-secondary-500 disabled:cursor-not-allowed disabled:opacity-50"
+          <MalioButton
+            label="Modifier"
+            button-class="w-[200px]"
             :disabled="isContractSubmitting || !isContractEndDateValid"
-          >
-            Modifier
-          </button>
+            @click="onSubmitCloseContract"
+          />
         </div>
       </form>
       </div>
@@ -188,27 +190,29 @@
                       class="mt-2 w-full rounded-md border border-neutral-300 bg-white px-3 py-2 text-base text-neutral-900 focus:border-primary-500 focus:outline-none focus:ring-2 focus:ring-secondary-500/20"
                   />
               </div>
-              <button
-                  type="button"
-                  class="w-full rounded-md bg-primary-500 px-4 py-2 text-base font-semibold text-white transition hover:bg-secondary-500 disabled:cursor-not-allowed disabled:opacity-60"
+              <MalioButton
+                  :label="form.id ? 'Modifier' : 'Ajouter'"
+                  button-class="w-full"
                   :disabled="!form.startDate || isSuspensionSubmitting"
                   @click="onSubmitSuspension(index)"
-              >
-                  {{ form.id ? 'Modifier' : 'Ajouter' }}
-              </button>
+              />
           </div>
 
-          <button
-              type="button"
-              class="w-full rounded-md border-2 border-dashed border-primary-500/50 px-4 py-3 text-base font-semibold text-primary-500/50 transition hover:border-primary-500 hover:text-primary-500"
+          <MalioButton
+              label="Ajouter une suspension"
+              icon-name="mdi:plus"
+              icon-position="left"
+              variant="tertiary"
+              button-class="w-full"
               @click="onAddSuspensionForm"
-          >
-              + Ajouter une suspension
-          </button>
+          />
       </div>
-    </AppDrawer>
+    </MalioDrawer>
 
-    <AppDrawer :model-value="isCreateContractDrawerOpen" title="Ajouter un contrat" @update:model-value="onUpdateCreateContractDrawerOpen">
+    <MalioDrawer :model-value="isCreateContractDrawerOpen" @update:model-value="onUpdateCreateContractDrawerOpen">
+      <template #header>
+          <h2 class="text-[32px] font-semibold text-primary-500">Ajouter un contrat</h2>
+      </template>
       <form class="space-y-4" @submit.prevent="onSubmitCreateContract">
         <div>
           <label class="text-md font-semibold text-neutral-700" for="create-contract-nature">
@@ -282,16 +286,17 @@
         />
 
         <div class="sticky bottom-0 -mx-[20px] bg-white px-[20px] py-3 flex justify-center">
-          <button
-            type="submit"
-            class="flex w-[200px] items-center justify-center gap-2 rounded-md bg-primary-500 px-4 py-2 text-md font-semibold text-white hover:bg-secondary-500 disabled:cursor-not-allowed disabled:opacity-50"
+          <MalioButton
+            label="Ajouter"
+            icon-name="mdi:plus"
+            icon-position="left"
+            button-class="w-[200px]"
             :disabled="isCreateContractSubmitting || !isCreateContractFormValid"
-          >
-            + Ajouter
-          </button>
+            @click="onSubmitCreateContract"
+          />
         </div>
       </form>
-    </AppDrawer>
+    </MalioDrawer>
   </section>
 </template>