fix:提交缺失文件

web/admin/src/composables/useSiteName.ts

@@ -0,0 +1,23 @@
+import { ref } from 'vue'
+import axios from 'axios'
+
+const siteName = ref('')
+let fetched = false
+
+async function fetchSiteName(): Promise<void> {
+	if (fetched) return
+	fetched = true
+	try {
+		const res = await axios.get('/api/settings/public', { timeout: 5000 })
+		const settings = res.data?.data?.settings
+		if (settings?.site_name) {
+			siteName.value = settings.site_name
+		}
+	} catch {
+		// silent — fallback to default
+	}
+}
+
+export function useSiteName() {
+	return { siteName, fetchSiteName }
+}