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/time-tracking/TimeEntryList.vue

@@ -54,13 +54,14 @@
             </div>
 
             <!-- Delete action -->
-            <button
-                class="shrink-0 rounded-md p-1.5 text-neutral-300 opacity-0 transition hover:bg-red-50 hover:text-red-500 group-hover:opacity-100"
-                :title="$t('common.delete')"
+            <MalioButtonIcon
+                icon="mdi:delete-outline"
+                :aria-label="$t('common.delete')"
+                variant="ghost"
+                icon-size="18"
+                button-class="shrink-0 text-neutral-300 opacity-0 hover:bg-red-50 hover:text-red-500 group-hover:opacity-100"
                 @click.stop="emit('deleteEntry', entry)"
-            >
-                <Icon name="mdi:delete-outline" size="18" />
-            </button>
+            />
         </div>
     </div>
 </template>