refactor : migrate UI to Malio layer-ui components (MalioButton, MalioDrawer, MalioSelectCheckbox)

- Replace all AppDrawer with MalioDrawer across 10 drawer components
- Replace native <button> with MalioButton/MalioButtonIcon in all pages and components
- Fix TimeTrackingExportDrawer: use MalioSelectCheckbox for multi-select filters
- Add Malio design system colors (m-btn-*, m-disabled, m-surface) to tailwind.config.ts
- Align toggle button heights with MalioButton (h-[40px])

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/components/ui/DataTable.vue

@@ -35,13 +35,15 @@
                     <td v-if="deletable || $slots.actions" class="px-4 py-3">
                         <div class="flex items-center gap-2">
                             <slot name="actions" :item="item" />
-                            <button
+                            <MalioButtonIcon
                                 v-if="deletable"
-                                class="text-neutral-400 transition-colors hover:text-red-500"
+                                icon="mdi:delete-outline"
+                                aria-label="Supprimer"
+                                variant="ghost"
+                                icon-size="20"
+                                button-class="text-neutral-400 hover:text-red-500"
                                 @click.stop="$emit('delete', item)"
-                            >
-                                <Icon name="mdi:delete-outline" size="20" />
-                            </button>
+                            />
                         </div>
                     </td>
                 </tr>