Improve website groups loading state

frontend/src/views/Websites.vue

@@ -53,7 +53,7 @@
     </div>
 
     <div class="content-grid">
-      <div class="panel">
+      <div class="panel website-groups-panel">
         <div class="panel-head">
           <div>
             <div class="panel-title">我的网站分组</div>
@@ -69,10 +69,39 @@
           >
             <el-option v-for="site in websites" :key="site.id" :label="site.name" :value="site.id" />
           </el-select>
-          <el-button size="small" :disabled="!selectedWebsite" :loading="groupsLoading" @click="loadWebsiteGroups">拉取分组</el-button>
+          <el-button size="small" :disabled="!selectedWebsite || groupsLoading" :loading="groupsLoading" @click="loadWebsiteGroups">拉取分组</el-button>
-          <el-button size="small" type="primary" :disabled="!selectedWebsite" @click="openGroupCreate">新增分组</el-button>
+          <el-button size="small" type="primary" :disabled="!selectedWebsite || groupsLoading" @click="openGroupCreate">新增分组</el-button>
         </div>
-        <el-table :data="sortedWebsiteGroups" v-loading="groupsLoading" row-key="id" size="small" style="width:100%">
+        <div class="website-groups-body">
+          <div v-if="!selectedWebsite" class="groups-state-panel">
+            <div class="groups-state-title">请选择网站</div>
+            <div class="groups-state-sub">选择一个目标网站后查看分组。</div>
+          </div>
+
+          <div v-else-if="groupsLoading && sortedWebsiteGroups.length === 0" class="groups-state-panel groups-state-loading">
+            <span class="groups-spinner" aria-hidden="true" />
+            <div class="groups-state-title">正在拉取网站分组...</div>
+            <div class="groups-state-sub">如果上游响应较慢，请稍等，超时后会显示具体错误。</div>
+          </div>
+
+          <div v-else-if="groupsError" class="groups-state-panel groups-state-error">
+            <div class="groups-state-title">分组拉取失败</div>
+            <div class="groups-state-sub">{{ groupsError }}</div>
+            <el-button size="small" :loading="groupsLoading" @click="loadWebsiteGroups">重新拉取</el-button>
+          </div>
+
+          <div v-else-if="sortedWebsiteGroups.length === 0" class="groups-state-panel">
+            <div class="groups-state-title">暂无分组</div>
+            <div class="groups-state-sub">当前网站没有返回分组，或还没有点击拉取。</div>
+            <el-button size="small" :loading="groupsLoading" @click="loadWebsiteGroups">拉取分组</el-button>
+          </div>
+
+          <template v-else>
+            <div v-if="groupsLoading" class="groups-refresh-strip">
+              <span class="groups-spinner groups-spinner-small" aria-hidden="true" />
+              正在刷新分组...
+            </div>
+            <el-table :data="sortedWebsiteGroups" row-key="id" size="small" style="width:100%">
               <el-table-column prop="name" label="分组" min-width="150" />
               <el-table-column prop="id" label="ID" min-width="130" />
               <el-table-column prop="description" label="描述" min-width="150" />
@@ -81,11 +110,13 @@
               </el-table-column>
               <el-table-column label="操作" width="140">
                 <template #default="{ row }">
-              <el-button size="small" text :disabled="!selectedWebsite" @click="openBindingCreate(selectedWebsite, row)">绑定</el-button>
+                  <el-button size="small" text :disabled="!selectedWebsite || groupsLoading" @click="openBindingCreate(selectedWebsite, row)">绑定</el-button>
-              <el-button size="small" text :disabled="!selectedWebsite" @click="openGroupEdit(row)">编辑</el-button>
+                  <el-button size="small" text :disabled="!selectedWebsite || groupsLoading" @click="openGroupEdit(row)">编辑</el-button>
                 </template>
               </el-table-column>
             </el-table>
+          </template>
+        </div>
       </div>
 
       <div class="panel">
@@ -1050,6 +1081,8 @@ const websites = ref<(WebsiteData & { _testing?: boolean })[]>([])
 const upstreams = ref<UpstreamData[]>([])
 const selectedWebsite = ref<WebsiteData | null>(null)
 const websiteGroups = ref<WebsiteGroup[]>([])
+const groupsError = ref('')
+const groupRequestSeq = ref(0)
 const sortedWebsiteGroups = computed(() => {
   return [...websiteGroups.value].sort((a, b) => {
     const rateA = a.rate_multiplier !== null && a.rate_multiplier !== undefined && a.rate_multiplier !== '—'
@@ -1303,6 +1336,8 @@ async function onSelectedWebsiteChange(value: number | string) {
   const next = websites.value.find((site) => site.id === nextId)
   if (!next) return
   selectedWebsite.value = next
+  websiteGroups.value = []
+  groupsError.value = ''
   await loadWebsiteGroups()
 }
 
@@ -1322,17 +1357,31 @@ async function loadUpstreamGroups() {
 }
 
 async function loadWebsiteGroups() {
-  if (!selectedWebsite.value) return
+  if (!selectedWebsite.value) {
+    groupRequestSeq.value += 1
+    websiteGroups.value = []
+    groupsError.value = ''
+    groupsLoading.value = false
+    return
+  }
+  const websiteId = selectedWebsite.value.id
+  const requestSeq = ++groupRequestSeq.value
   groupsLoading.value = true
+  groupsError.value = ''
   try {
-    const res = await websitesApi.groups(selectedWebsite.value.id)
+    const res = await websitesApi.groups(websiteId)
+    if (requestSeq !== groupRequestSeq.value || selectedWebsite.value?.id !== websiteId) return
     websiteGroups.value = res.data
   } catch (e: any) {
-    ElMessage.error(e.response?.data?.detail || '拉取分组失败')
+    if (requestSeq !== groupRequestSeq.value || selectedWebsite.value?.id !== websiteId) return
+    groupsError.value = e.response?.data?.detail || e.message || '拉取分组失败'
+    ElMessage.error(groupsError.value)
   } finally {
+    if (requestSeq === groupRequestSeq.value && selectedWebsite.value?.id === websiteId) {
       groupsLoading.value = false
     }
   }
+}
 
 async function loadBindingWebsiteGroups(websiteId: number) {
   if (!websiteId) {
@@ -1460,6 +1509,8 @@ async function loadAll() {
 
 function selectWebsite(row: WebsiteData) {
   selectedWebsite.value = row
+  websiteGroups.value = []
+  groupsError.value = ''
   loadWebsiteGroups()
 }
 
@@ -1547,6 +1598,9 @@ async function deleteWebsite(row: WebsiteData) {
     ElMessage.success('已删除')
     selectedWebsite.value = null
     websiteGroups.value = []
+    groupsError.value = ''
+    groupRequestSeq.value += 1
+    groupsLoading.value = false
     await loadAll()
   } catch {}
 }
@@ -2365,6 +2419,81 @@ onMounted(loadAll)
   flex-shrink: 0;
 }
 
+.website-groups-body {
+  min-height: 220px;
+  position: relative;
+}
+
+.groups-state-panel {
+  min-height: 220px;
+  padding: 32px 18px;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 10px;
+  text-align: center;
+  color: var(--text-muted);
+  background:
+    linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent),
+    rgba(255, 255, 255, 0.01);
+}
+
+.groups-state-title {
+  font-size: 14px;
+  font-weight: 600;
+  color: var(--text-primary);
+}
+
+.groups-state-sub {
+  max-width: 360px;
+  font-size: 12px;
+  line-height: 1.6;
+  color: var(--text-muted);
+  overflow-wrap: anywhere;
+}
+
+.groups-state-loading .groups-state-title {
+  color: var(--color-primary-strong);
+}
+
+.groups-state-error .groups-state-title {
+  color: var(--color-danger);
+}
+
+.groups-spinner {
+  width: 28px;
+  height: 28px;
+  border-radius: 50%;
+  border: 2px solid rgba(166, 141, 133, 0.25);
+  border-top-color: var(--color-primary-strong);
+  animation: groups-spin 0.8s linear infinite;
+}
+
+.groups-spinner-small {
+  width: 14px;
+  height: 14px;
+  border-width: 2px;
+}
+
+.groups-refresh-strip {
+  min-height: 34px;
+  padding: 0 14px;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  border-bottom: 1px solid var(--border-color);
+  color: var(--text-muted);
+  font-size: 12px;
+  background: rgba(255, 255, 255, 0.02);
+}
+
+@keyframes groups-spin {
+  to {
+    transform: rotate(360deg);
+  }
+}
+
 .binding-actions {
   display: flex;
   align-items: center;