fix: 修复部分参数bug

src/views/dashboard/DashboardView.vue

@@ -76,7 +76,7 @@ async function fetchSummary() {
 async function fetchAnnouncement() {
   announcementLoading.value = true
   try {
-    const res = await authApi.getPublicConfig('announcement')
+    const res = await authApi.getPublicConfig('system.announcement')
     if (res.code === 200 && res.data) announcement.value = String(res.data)
   } finally {
     announcementLoading.value = false

src/views/system/ConfigManage.vue

@@ -171,7 +171,7 @@ onMounted(() => {
           <template v-else>
             <div class="flex items-center gap-3">
               <Label>允许用户注册</Label>
-              <Switch v-model:checked="allowRegister" />
+              <Switch v-model="allowRegister" />
               <span class="text-sm text-muted-foreground">{{ allowRegister ? '已开启' : '已关闭' }}</span>
             </div>
             <div class="flex justify-end">