feat(upstreams): add batch test-all / check-now-all endpoints

- POST /api/upstreams/test-all: batch connection test for all enabled
  upstreams (no snapshot, no webhook); updates last_status, balance
- POST /api/upstreams/check-now-all: full batch sync (snapshot, diff,
  webhook, key sync, priority sync); mirrors single check-now behavior
- Both routes are registered before /{uid} to avoid path capture
- Skips disabled upstreams (status=skipped); single failure does not
  abort subsequent upstreams (serial execution)
- Returns UpstreamBatchActionResponse with per-item detail and summary

Refactor: extract _test_upstream_core(db, u) and _check_now_core(db, u)
- All four routes (single + batch × 2) now share the same core helpers
- Eliminates duplicate logic and future divergence risk

Frontend:
- Add UpstreamBatchActionResponse / Item / Summary TS types
- Add upstreamsApi.testAll() and upstreamsApi.checkNowAll()
- Add '一键测试' and '一键同步' buttons in Upstreams.vue toolbar
  (order: 一键测试 → 一键同步 → 刷新 → 新增上游)
- Buttons disabled when list is empty or another batch op is running
- On completion: refresh list + ElMessageBox with per-item failure detail

frontend/src/api/index.ts

@@ -139,6 +139,28 @@ export interface GenerateKeysByGroupsForm {
   endpoint: string
 }
 
+export interface UpstreamBatchActionItem {
+  upstream_id: number
+  upstream_name: string
+  status: 'success' | 'failed' | 'skipped'
+  message: string
+  detail?: string | null
+}
+
+export interface UpstreamBatchActionSummary {
+  total: number
+  success: number
+  failed: number
+  skipped: number
+}
+
+export interface UpstreamBatchActionResponse {
+  success: boolean
+  message: string
+  summary: UpstreamBatchActionSummary
+  items: UpstreamBatchActionItem[]
+}
+
 export const upstreamsApi = {
   list: () => api.get<UpstreamData[]>('/api/upstreams'),
   create: (data: UpstreamForm) => api.post<UpstreamData>('/api/upstreams', data),
@@ -152,6 +174,8 @@ export const upstreamsApi = {
   latestSnapshot: (id: number) => api.get(`/api/upstreams/${id}/snapshots/latest`),
   listSnapshots: (id: number, limit = 20, offset = 0) =>
     api.get<any[]>(`/api/upstreams/${id}/snapshots`, { params: { limit, offset } }),
+  testAll: () => api.post<UpstreamBatchActionResponse>('/api/upstreams/test-all'),
+  checkNowAll: () => api.post<UpstreamBatchActionResponse>('/api/upstreams/check-now-all'),
 }
 
 // ——— Websites ———

frontend/src/views/Upstreams.vue

@@ -7,6 +7,25 @@
           <h3 class="data-stage-title brand-type">检测与变更控制台</h3>
         </div>
         <div class="toolbar-cluster">
+          <el-button
+            id="btn-test-all"
+            size="small"
+            text
+            :loading="testingAll"
+            :disabled="list.length === 0 || testingAll || checkingAll"
+            @click="testAll"
+            title="批量测试所有启用上游的连接（不写快照）"
+          >一键测试</el-button>
+          <el-button
+            id="btn-check-now-all"
+            size="small"
+            type="warning"
+            plain
+            :loading="checkingAll"
+            :disabled="list.length === 0 || testingAll || checkingAll"
+            @click="checkNowAll"
+            title="批量完整同步所有启用上游（拉取倍率、写快照、触发 Webhook）"
+          >一键同步</el-button>
           <el-button size="small" text @click="loadList" :loading="tableLoading">刷新</el-button>
           <el-button size="small" type="primary" @click="openCreate">新增上游</el-button>
         </div>
@@ -397,11 +416,13 @@ import { ElMessage, ElMessageBox } from 'element-plus'
 import type { FormInstance } from 'element-plus'
 import dayjs from 'dayjs'
 import { Refresh, Plus, Edit, List, Delete, Warning, Clock, ArrowRight, Pointer, Key } from '@element-plus/icons-vue'
-import { upstreamsApi, type GeneratedUpstreamKey, type UpstreamData } from '@/api'
+import { upstreamsApi, type GeneratedUpstreamKey, type UpstreamData, type UpstreamBatchActionResponse } from '@/api'
 import AuthCaptureDialog from '@/components/AuthCaptureDialog.vue'
 
 const list = ref<(UpstreamData & { _testing?: boolean; _checking?: boolean })[]>([])
 const tableLoading = ref(false)
+const testingAll = ref(false)
+const checkingAll = ref(false)
 
 const drawerVisible = ref(false)
 const saving = ref(false)
@@ -812,6 +833,54 @@ async function confirmDelete(row: UpstreamData) {
   }
 }
 
+function _showBatchResult(res: UpstreamBatchActionResponse, actionLabel: string) {
+  const { summary, items, message } = res
+  const failed = items.filter(i => i.status === 'failed')
+
+  if (failed.length > 0) {
+    const failedLines = failed
+      .map(i => `• ${i.upstream_name}：${i.detail || i.message}`)
+      .join('\n')
+    ElMessageBox.alert(
+      `${message}\n\n失败明细：\n${failedLines}`,
+      `${actionLabel}完成`,
+      {
+        type: 'warning',
+        confirmButtonText: '知道了',
+        customStyle: { whiteSpace: 'pre-wrap', maxHeight: '60vh', overflowY: 'auto' },
+      }
+    )
+  } else {
+    ElMessage[res.success ? 'success' : 'warning'](message)
+  }
+}
+
+async function testAll() {
+  testingAll.value = true
+  try {
+    const res = await upstreamsApi.testAll()
+    await loadList()
+    _showBatchResult(res.data, '一键测试')
+  } catch (e: any) {
+    ElMessage.error(e.response?.data?.detail || '批量测试失败')
+  } finally {
+    testingAll.value = false
+  }
+}
+
+async function checkNowAll() {
+  checkingAll.value = true
+  try {
+    const res = await upstreamsApi.checkNowAll()
+    await loadList()
+    _showBatchResult(res.data, '一键同步')
+  } catch (e: any) {
+    ElMessage.error(e.response?.data?.detail || '批量同步失败')
+  } finally {
+    checkingAll.value = false
+  }
+}
+
 onMounted(loadList)
 </script>