chore(Tabs): improve slots

src/runtime/components/Tabs.vue

@@ -10,7 +10,7 @@ const appConfig = _appConfig as AppConfig & { ui: { tabs: Partial<typeof theme>
 const tabs = tv({ extend: tv(theme), ...(appConfig.ui?.tabs || {}) })
 
 export interface TabsItem {
-  label: string
+  label?: string
   value?: string
   slot?: string
   disabled?: boolean
@@ -25,13 +25,13 @@ export interface TabsProps<T extends TabsItem> extends Omit<TabsRootProps, 'asCh
 
 export interface TabsEmits extends TabsRootEmits {}
 
-type SlotFunction<T> = (props: { item: T, index: number }) => any
+type SlotProps<T> = (props: { item: T, index: number }) => any
 
 export type TabsSlots<T extends TabsItem> = {
-  default(): any
-  content(): SlotFunction<T>
+  default: SlotProps<T>
+  content: SlotProps<T>
 } & {
-  [key in T['slot'] as string]?: SlotFunction<T>
+  [key in T['slot'] as string]?: SlotProps<T>
 }
 </script>
 
@@ -54,9 +54,9 @@ const ui = computed(() => tv({ extend: tabs, slots: props.ui })())
       <TabsIndicator :class="ui.indicator()" />
 
       <TabsTrigger v-for="(item, index) of items" :key="index" :value="item.value || String(index)" :disabled="item.disabled" :class="ui.trigger()">
-        <slot :item="item" :index="index">
-          <span class="truncate">{{ item.label }}</span>
-        </slot>
+        <span v-if="item.label || $slots.default" :class="ui.label()">
+          <slot :item="item" :index="index">{{ item.label }}</slot>
+        </span>
       </TabsTrigger>
     </TabsList>