Round 4 fixes: scheduler DB save check, empty validation_targets, proxy list page fallback, scheduler frontend state sync, tests

WebUI/src/composables/useScheduler.js

@@ -16,31 +16,41 @@ export function useScheduler() {
     }
   }
 
-  async function startScheduler(onSuccess) {
+  async function startScheduler(onSuccess, onError) {
     schedulerLoading.value = true
     try {
       const response = await schedulerService.start()
       if (response.code === 200) {
-        schedulerRunning.value = true
-        onSuccess?.('自动验证已启动')
+        schedulerRunning.value = response.data.running
+        if (response.data.running) {
+          onSuccess?.('自动验证已启动')
+        } else {
+          onError?.('启动调度器失败')
+        }
       }
     } catch (error) {
       console.error('启动调度器失败:', error)
+      onError?.('启动调度器失败')
     } finally {
       schedulerLoading.value = false
     }
   }
 
-  async function stopScheduler(onSuccess) {
+  async function stopScheduler(onSuccess, onError) {
     schedulerLoading.value = true
     try {
       const response = await schedulerService.stop()
       if (response.code === 200) {
-        schedulerRunning.value = false
-        onSuccess?.('自动验证已停止')
+        schedulerRunning.value = response.data.running
+        if (!response.data.running) {
+          onSuccess?.('自动验证已停止')
+        } else {
+          onError?.('停止调度器失败')
+        }
       }
     } catch (error) {
       console.error('停止调度器失败:', error)
+      onError?.('停止调度器失败')
     } finally {
       schedulerLoading.value = false
     }

WebUI/src/views/ProxyList.vue

@@ -202,6 +202,10 @@ async function fetchProxies() {
     
     if (!success) {
       ElMessage.error('获取代理列表失败')
+    } else if (proxyStore.proxies.length === 0 && currentPage.value > 1) {
+      // 当前页无数据时自动回退一页
+      currentPage.value -= 1
+      return fetchProxies()
     }
   } catch (error) {
     if (error.name === 'AbortError') {

WebUI/src/views/Settings.vue

@@ -290,11 +290,17 @@ async function fetchSettings() {
 
 // ==================== 调度器控制 ====================
 async function handleStartScheduler() {
-  await startScheduler((msg) => ElMessage.success(msg))
+  await startScheduler(
+    (msg) => ElMessage.success(msg),
+    (msg) => ElMessage.error(msg)
+  )
 }
 
 async function handleStopScheduler() {
-  await stopScheduler((msg) => ElMessage.success(msg))
+  await stopScheduler(
+    (msg) => ElMessage.success(msg),
+    (msg) => ElMessage.error(msg)
+  )
 }
 
 async function handleValidateNow() {