优化一些功能

frontend/src/App.vue

@@ -8,6 +8,7 @@ import { useLogs } from '@/composables/useLogs'
 import { useActivity } from '@/composables/useActivity'
 import AppShell from '@/components/layout/AppShell.vue'
 import ToastContainer from '@/components/ToastContainer.vue'
+import { GetTime, GetVersion } from '@wails/go/app/App'
 
 const { initTheme } = useTheme()
 const { loadProducts, restoreSelection: restoreProductSelection } = useProducts()
@@ -25,11 +26,9 @@ let timeTimer: number | null = null
 let logTimer: number | null = null
 let resultTimer: number | null = null
 
-const App = window.go.app.App
-
 const updateTime = async () => {
   try {
-    const d = await App.GetTime()
+    const d = await GetTime()
     serverTime.value = d.serverTime || '--'
   } catch {}
 }
@@ -68,7 +67,7 @@ onMounted(async () => {
 
   // 获取版本号
   try {
-    version.value = await App.GetVersion()
+    version.value = await GetVersion()
   } catch {}
 
   // 清空后端旧结果

frontend/src/components/ck/CKManager.vue

@@ -2,12 +2,15 @@
 import { ref, computed } from 'vue'
 import { useProducts } from '@/composables/useProducts'
 import { useToast } from '@/composables/useToast'
+import {
+  ExportAccountsWithProduct,
+  OrganizeAccounts,
+  VerifyAndExport
+} from '@wails/go/app/App'
 
 const { selectedProductId, selectedProductName, selectedProduct } = useProducts()
 const { showToast } = useToast()
 
-const App = window.go.app.App
-
 // 状态
 const loading = ref(false)
 const verifyResult = ref<any>(null)
@@ -42,14 +45,14 @@ const handleVerify = async () => {
 
   loading.value = true
   try {
-    const result = await App.VerifyAndExport(selectedProductId.value)
+    const result = await VerifyAndExport(selectedProductId.value)
     verifyResult.value = result
     organizeResult.value = null
 
     if (result.success) {
       showToast('复验完成', `已抢到: ${result.hitCount}, 未抢到: ${result.missCount}`, 'success')
     } else {
-      showToast('复验失败', result.error, 'error')
+      showToast('复验失败', '后端未返回成功状态', 'error')
     }
   } catch (e: any) {
     showToast('复验失败', e.message, 'error')
@@ -66,7 +69,7 @@ const exportHitAccounts = async () => {
   }
 
   try {
-    const result = await App.ExportAccountsWithProduct(
+    const result = await ExportAccountsWithProduct(
       verifyResult.value.hitAccounts,
       selectedProductId.value,
       selectedProductName.value || ''
@@ -74,7 +77,7 @@ const exportHitAccounts = async () => {
     if (result.success) {
       showToast('导出成功', `已导出 ${result.count} 个账号到 ${result.filePath}`, 'success')
     } else {
-      showToast('导出失败', result.error, 'error')
+      showToast('导出失败', result.error || '', 'error')
     }
   } catch (e: any) {
     showToast('导出失败', e.message, 'error')
@@ -91,14 +94,14 @@ const handleOrganize = async () => {
   loading.value = true
   try {
     const { start, end } = timeRangeMs.value
-    const result = await App.OrganizeAccounts(selectedProductId.value, selectedProductName.value, start, end)
+    const result = await OrganizeAccounts(selectedProductId.value, selectedProductName.value, start, end)
     organizeResult.value = result
     verifyResult.value = null
 
     if (result.success) {
       showToast('整理完成', `已抢到: ${result.hitCount}, 未抢到: ${result.missCount}`, 'success')
     } else {
-      showToast('整理失败', result.error, 'error')
+      showToast('整理失败', result.error || '', 'error')
     }
   } catch (e: any) {
     showToast('整理失败', e.message, 'error')

frontend/src/components/modal/SettingsModal.vue

@@ -7,11 +7,12 @@ const { settings, loadSettings, saveSettings } = useSettings()
 const visible = ref(false)
 const formData = ref({
   timeApiUrl: '',
+  activity: '',
   traceEnabled: false,
   traceMaxBody: 0,
   logLevel: 'info',
   concurrency: 150,
-  attempts: 1,
+  attempts: 2,
   retryStages: [] as RetryStage[],
   seckillMode: 1
 })

frontend/src/composables/useAccounts.ts

@@ -1,5 +1,12 @@
 import { ref } from 'vue'
 import { useToast } from './useToast'
+import {
+  GetAccounts,
+  QueryScore,
+  ReloadAccounts,
+  VerifyAllExchange,
+  VerifyExchange
+} from '@wails/go/app/App'
 
 export interface Account {
   index: number
@@ -13,8 +20,6 @@ export interface AccountStatus {
   message?: string
 }
 
-const App = window.go.app.App
-
 const accounts = ref<Account[]>([])
 const selectedIndices = ref<Set<number>>(new Set())
 const statusMap = ref<Record<string, AccountStatus | boolean>>({})
@@ -24,7 +29,7 @@ export function useAccounts() {
   const { showToast } = useToast()
 
   const loadAccounts = async () => {
-    const data = await App.GetAccounts()
+    const data = await GetAccounts()
     accounts.value = data || []
 
     // 清理无效选择
@@ -35,7 +40,7 @@ export function useAccounts() {
   }
 
   const reloadAccounts = async () => {
-    const data = await App.ReloadAccounts()
+    const data = await ReloadAccounts()
     await loadAccounts()
     showToast('账号已刷新', `共 ${data.count} 个账号`, 'success')
   }
@@ -81,7 +86,7 @@ export function useAccounts() {
     showToast('查询积分', '正在并发查询...', 'info')
     const tasks = accounts.value.map(async (a) => {
       try {
-        const d = await App.QueryScore(a.name)
+        const d = await QueryScore(a.name)
         const score = d.score ?? 'N/A'
         scoreMap.value[a.name] = String(score)
         localStorage.setItem('accScore_' + a.name, String(score))
@@ -193,7 +198,7 @@ export function useVerifyExchange() {
 
   const verifyAccount = async (accountName: string) => {
     try {
-      const result = await App.VerifyExchange(accountName)
+      const result = await VerifyExchange(accountName)
       verifyResults.value[accountName] = result
       return result
     } catch (e: any) {
@@ -206,8 +211,8 @@ export function useVerifyExchange() {
     verifying.value = true
     try {
       // 使用后端批量查询接口，自带间隔
-      const results = await App.VerifyAllExchange()
-      verifyResults.value = results || {}
+      const results = await VerifyAllExchange()
+      verifyResults.value = results?.results || {}
     } catch (e: any) {
       console.error('批量复验失败:', e)
     } finally {

frontend/src/composables/useActivity.ts

@@ -1,5 +1,6 @@
 import { ref } from 'vue'
 import { useToast } from './useToast'
+import { GetActivities, GetCurrentActivity, SwitchActivity } from '@wails/go/app/App'
 
 // 活动项（与后端 types.ActivityInfo 对齐）
 export interface ActivityItem {
@@ -12,8 +13,7 @@ const activities = ref<ActivityItem[]>([])
 const currentActivity = ref<ActivityItem | null>(null)
 const switching = ref(false)
 
-// 与项目其他 composable 一致，直接走 Wails 运行时注入的 window.go.app.App
-const App = window.go.app.App
+// 统一走 Wails 自动生成绑定，后端签名变化时可由 TypeScript 暴露问题。
 
 export function useActivity() {
   const { showToast } = useToast()
@@ -21,10 +21,10 @@ export function useActivity() {
   // 拉取全部活动与当前生效活动
   const loadActivities = async () => {
     try {
-      const list = await App.GetActivities()
+      const list = await GetActivities()
       activities.value = list || []
       try {
-        currentActivity.value = await App.GetCurrentActivity()
+        currentActivity.value = await GetCurrentActivity()
       } catch {
         // 当前活动读取失败不阻塞列表展示
       }
@@ -38,7 +38,7 @@ export function useActivity() {
     if (id === currentActivity.value?.id) return true
     switching.value = true
     try {
-      const d: Record<string, any> = await App.SwitchActivity(id)
+      const d: Record<string, any> = await SwitchActivity(id)
       if (d && d.success) {
         currentActivity.value = { id: d.activity, displayName: d.displayName }
         showToast('活动已切换', (d.displayName || id) + '，正在刷新商品...', 'success')

frontend/src/composables/useLogs.ts

@@ -1,5 +1,6 @@
 import { ref } from 'vue'
 import { useAccounts, type AccountStatus } from './useAccounts'
+import { ClearResults, GetLogs, GetResults } from '@wails/go/app/App'
 
 export interface LogEntry {
   id: number
@@ -20,8 +21,6 @@ export interface LogMessage {
   source: 'local' | 'server'
 }
 
-const App = window.go.app.App
-
 const logs = ref<LogMessage[]>([])
 const results = ref<Record<string, string>>({})
 const lastLogId = ref(0)
@@ -91,7 +90,7 @@ export function useLogs() {
 
   const fetchServerLogs = async () => {
     try {
-      const d = await App.GetLogs(lastLogId.value)
+      const d = await GetLogs(lastLogId.value)
       if (!d.success || !Array.isArray(d.logs) || d.logs.length === 0) return
 
       d.logs.forEach((item: LogEntry) => {
@@ -127,7 +126,7 @@ export function useLogs() {
 
   const checkResults = async () => {
     try {
-      const d = await App.GetResults()
+      const d = await GetResults()
       const data = (d || {}) as Record<string, string>
       const json = JSON.stringify(d)
 
@@ -156,7 +155,7 @@ export function useLogs() {
   }
 
   const clearResults = async () => {
-    await App.ClearResults()
+    await ClearResults()
     clearLocalResults()
   }
 

frontend/src/composables/useProducts.ts

@@ -1,5 +1,6 @@
 import { ref, computed } from 'vue'
 import { useToast } from './useToast'
+import { LoadProducts } from '@wails/go/app/App'
 
 export interface Product {
   commodityId: string
@@ -25,8 +26,6 @@ export interface ProductPayload {
   stale: boolean
 }
 
-const App = window.go.app.App
-
 const products = ref<Product[]>([])
 const productInfo = ref<ProductPayload | null>(null)
 const selectedProductId = ref<string | null>(null)
@@ -54,7 +53,7 @@ export function useProducts() {
   const loadProducts = async (showToastMsg = true) => {
     loading.value = true
     try {
-      const data = await App.LoadProducts(true)
+      const data = await LoadProducts(true)
       products.value = Array.isArray(data.products) ? data.products : []
       productInfo.value = data
 

frontend/src/composables/useScheduler.ts

@@ -3,8 +3,7 @@ import { useToast } from './useToast'
 import { useAccounts } from './useAccounts'
 import { useProducts } from './useProducts'
 import { useLogs } from './useLogs'
-
-const App = window.go.app.App
+import { CancelSchedule, SetSchedule, StartSeckill } from '@wails/go/app/App'
 
 const scheduleActive = ref(false)
 const countdownSeconds = ref(0)
@@ -33,7 +32,7 @@ export function useScheduler() {
     showToast('抢购中', `${Object.keys(ap).length} 个账号正在抢购`, 'info', 3000)
 
     try {
-      const d = await App.StartSeckill(ap)
+      const d = await StartSeckill(ap)
       if (d?.success === false) {
         throw new Error(d.error || '提交失败')
       }
@@ -75,12 +74,12 @@ export function useScheduler() {
     addLocalLog(`设置定时: ${fullTime}`, 'i')
 
     try {
-      const d = await App.SetSchedule({
+      const d = await SetSchedule({
         accountProducts: ap,
         targetTime: fullTime
       })
       if (d?.success === false) {
-        throw new Error(d.error || '定时设置失败')
+        throw new Error('定时设置失败')
       }
 
       scheduleActive.value = true
@@ -106,7 +105,7 @@ export function useScheduler() {
 
   const cancelSchedule = async () => {
     try {
-      await App.CancelSchedule()
+      await CancelSchedule()
     } catch {}
 
     scheduleActive.value = false

frontend/src/composables/useSettings.ts

@@ -1,5 +1,7 @@
 import { ref } from 'vue'
 import { useToast } from './useToast'
+import { GetSettings, SaveSettings } from '@wails/go/app/App'
+import { types } from '@wails/go/models'
 
 export interface RetryStage {
   maxElapsed: number
@@ -8,6 +10,7 @@ export interface RetryStage {
 
 export interface Settings {
   timeApiUrl: string
+  activity: string
   traceEnabled: boolean
   traceMaxBody: number
   logLevel: string
@@ -17,8 +20,6 @@ export interface Settings {
   seckillMode: number // 0=标准, 1=激进
 }
 
-const App = window.go.app.App
-
 const defaultRetryStages: RetryStage[] = [
   { maxElapsed: 4, interval: 120 },
   { maxElapsed: 12, interval: 200 },
@@ -28,11 +29,12 @@ const defaultRetryStages: RetryStage[] = [
 
 const settings = ref<Settings>({
   timeApiUrl: '',
+  activity: '',
   traceEnabled: false,
   traceMaxBody: 0,
   logLevel: 'info',
   concurrency: 150,
-  attempts: 1,
+  attempts: 2,
   retryStages: [...defaultRetryStages],
   seckillMode: 1
 })
@@ -42,14 +44,15 @@ export function useSettings() {
 
   const loadSettings = async () => {
     try {
-      const cfg = await App.GetSettings()
+      const cfg = await GetSettings()
       settings.value = {
         timeApiUrl: cfg.timeApiUrl || '',
+        activity: cfg.activity || '',
         traceEnabled: !!cfg.traceEnabled,
         traceMaxBody: cfg.traceMaxBody || 0,
         logLevel: cfg.logLevel || 'info',
         concurrency: cfg.concurrency || 150,
-        attempts: cfg.attempts || 1,
+        attempts: cfg.attempts || 2,
         retryStages: cfg.retryStages && cfg.retryStages.length > 0
           ? cfg.retryStages
           : [...defaultRetryStages],
@@ -62,13 +65,13 @@ export function useSettings() {
 
   const saveSettings = async (newSettings: Settings) => {
     try {
-      const d = await App.SaveSettings(newSettings)
+      const d = await SaveSettings(types.Config.createFrom(newSettings))
       if (d.success) {
         settings.value = { ...newSettings }
         showToast('设置已保存', '配置已生效', 'success')
         return true
       } else {
-        showToast('保存失败', d.error || '', 'error')
+        showToast('保存失败', '后端未返回成功状态', 'error')
         return false
       }
     } catch (e: any) {

frontend/src/env.d.ts

@@ -5,19 +5,3 @@ declare module '*.vue' {
   const component: DefineComponent<{}, {}, any>
   export default component
 }
-
-// 统一从 Wails 自动生成的强类型绑定派生 window.go.app.App 的类型声明，
-// 避免手写声明与后端契约漂移。后端方法签名变更后重新运行 `wails generate`
-// 会更新 wailsjs/go/app/App.d.ts，此处类型随之更新；若前端引用了已删除或
-// 已重命名的方法，TypeScript 编译（vue-tsc）会直接报错。
-import type * as GoApp from './wailsjs/go/app/App'
-
-declare global {
-  interface Window {
-    go: {
-      app: {
-        App: typeof GoApp
-      }
-    }
-  }
-}

frontend/tsconfig.json

@@ -16,7 +16,8 @@
     "noUnusedParameters": false,
     "noFallthroughCasesInSwitch": true,
     "paths": {
-      "@/*": ["./src/*"]
+      "@/*": ["./src/*"],
+      "@wails/*": ["./wailsjs/*"]
     }
   },
   "include": ["src/**/*.ts", "src/**/*.tsx", "src/**/*.vue", "wailsjs/**/*.ts"]

frontend/vite.config.ts

@@ -6,7 +6,8 @@ export default defineConfig({
   plugins: [vue()],
   resolve: {
     alias: {
-      '@': resolve(__dirname, 'src')
+      '@': resolve(__dirname, 'src'),
+      '@wails': resolve(__dirname, 'wailsjs')
     }
   },
   build: {

internal/app/app.go

@@ -28,9 +28,11 @@ type App struct {
 	client    *client.DouyuClient
 	scheduler *seckill.Scheduler
 	logStore  *logger.MemoryLogStore
-	trace     *trace.Recorder
-	paths     types.AppPaths
-	font      *truetype.Font
+
+	traceMu sync.RWMutex
+	trace   *trace.Recorder
+	paths   types.AppPaths
+	font    *truetype.Font
 
 	cfgMu sync.RWMutex
 	cfg   types.Config
@@ -50,6 +52,13 @@ func (a *App) getClient() *client.DouyuClient {
 	return a.client
 }
 
+// getTrace 返回当前 trace 记录器快照（读锁保护）。
+func (a *App) getTrace() *trace.Recorder {
+	a.traceMu.RLock()
+	defer a.traceMu.RUnlock()
+	return a.trace
+}
+
 // getCfg 返回当前配置的深拷贝（读锁保护）。
 func (a *App) getCfg() types.Config {
 	a.cfgMu.RLock()
@@ -71,6 +80,25 @@ func (a *App) setCfg(c types.Config) {
 	a.cfgMu.Unlock()
 }
 
+// replaceTrace 根据配置替换 trace 记录器，旧记录器在锁外关闭，避免阻塞读路径。
+func (a *App) replaceTrace(cfg types.Config) {
+	traceCfg := types.TraceConfig{
+		Enabled:      cfg.TraceEnabled,
+		MaxBodyBytes: cfg.TraceMaxBody,
+	}
+	tr, closeTrace := trace.InitTrace(a.paths.LogDir, traceCfg)
+
+	a.traceMu.Lock()
+	oldClose := a.closeTrace
+	a.trace = tr
+	a.closeTrace = closeTrace
+	a.traceMu.Unlock()
+
+	if oldClose != nil {
+		oldClose()
+	}
+}
+
 // cloneConfig 深拷贝配置，避免 RetryStages 切片共享引用。
 func cloneConfig(c types.Config) types.Config {
 	cp := c
@@ -98,13 +126,7 @@ func (a *App) Startup(ctx context.Context) {
 	a.cfg = config.LoadConfig(a.paths.ConfigFile)
 	logger.SetMinLevel(a.cfg.LogLevel)
 
-	traceCfg := types.TraceConfig{
-		Enabled:      a.cfg.TraceEnabled,
-		MaxBodyBytes: a.cfg.TraceMaxBody,
-	}
-	tr, closeTrace := trace.InitTrace(a.paths.LogDir, traceCfg)
-	a.trace = tr
-	a.closeTrace = closeTrace
+	a.replaceTrace(a.cfg)
 
 	// 解析当前活动：配置中的 activity ID 决定使用哪套接口参数
 	act := activity.Get(a.cfg.Activity)
@@ -112,7 +134,7 @@ func (a *App) Startup(ctx context.Context) {
 		act = activity.Default()
 		logger.LogEvent("活动", "warn", "配置中的活动 %q 未识别，已回退到默认活动 %s", a.cfg.Activity, act.DisplayName)
 	}
-	a.client = client.New(act, a.cfg.TimeAPIURL, a.trace)
+	a.client = client.New(act, a.cfg.TimeAPIURL, a.getTrace())
 	a.font = imgpkg.LoadFont(a.paths.FontFiles)
 	a.scheduler = seckill.New(a.client, a.paths, a.font, a.cfg.Concurrency, a.cfg.Attempts, a.cfg.RetryStages, a.cfg.SeckillMode)
 	a.scheduler.LoadAccounts()
@@ -136,8 +158,13 @@ func (a *App) Shutdown(ctx context.Context) {
 	if a.scheduler != nil {
 		a.scheduler.Close()
 	}
-	if a.closeTrace != nil {
-		a.closeTrace()
+	a.traceMu.Lock()
+	closeTrace := a.closeTrace
+	a.closeTrace = nil
+	a.trace = nil
+	a.traceMu.Unlock()
+	if closeTrace != nil {
+		closeTrace()
 	}
 	if a.closeLog != nil {
 		a.closeLog()

internal/app/app_activity.go

@@ -43,7 +43,7 @@ func (a *App) SwitchActivity(id string) types.SwitchActivityResult {
 		return types.SwitchActivityResult{Error: "配置保存失败: " + err.Error()}
 	}
 	a.setCfg(cfg)
-	newClient := client.New(act, cfg.TimeAPIURL, a.trace)
+	newClient := client.New(act, cfg.TimeAPIURL, a.getTrace())
 	a.setClient(newClient)
 	if !a.scheduler.UpdateClient(newClient) {
 		logger.LogEvent("活动", "warn", "抢购任务正在运行，调度器客户端将在下次抢购时生效")
@@ -62,6 +62,24 @@ func (a *App) GetSettings() types.Config {
 
 // SaveSettings 保存配置并运行时生效。
 func (a *App) SaveSettings(cfg types.Config) types.SimpleResult {
+	oldCfg := a.getCfg()
+	if cfg.Activity == "" {
+		cfg.Activity = oldCfg.Activity
+	}
+	act := activity.Get(cfg.Activity)
+	if act == nil {
+		unknownActivity := cfg.Activity
+		act = activity.Default()
+		cfg.Activity = act.ID
+		logger.LogEvent("配置", "warn", "保存设置时活动 %q 未识别，已回退到默认活动 %s", unknownActivity, act.DisplayName)
+	}
+	if cfg.TimeAPIURL == "" {
+		cfg.TimeAPIURL = constants.DefaultTimeAPI
+	}
+	if cfg.TraceMaxBody < 0 {
+		cfg.TraceMaxBody = 0
+	}
+
 	// 校验
 	if cfg.Concurrency <= 0 {
 		cfg.Concurrency = constants.DefaultConcurrency
@@ -79,10 +97,28 @@ func (a *App) SaveSettings(cfg types.Config) types.SimpleResult {
 		return types.SimpleResult{}
 	}
 
+	traceChanged := cfg.TraceEnabled != oldCfg.TraceEnabled || cfg.TraceMaxBody != oldCfg.TraceMaxBody
+	clientChanged := traceChanged || cfg.TimeAPIURL != oldCfg.TimeAPIURL || cfg.Activity != oldCfg.Activity
+	if traceChanged {
+		a.replaceTrace(cfg)
+	}
+
 	// 运行时生效
 	a.setCfg(cfg)
 	logger.SetMinLevel(cfg.LogLevel)
 	a.scheduler.UpdateSettings(cfg.Concurrency, cfg.Attempts, cfg.RetryStages, cfg.SeckillMode)
+	if clientChanged {
+		newClient := client.New(act, cfg.TimeAPIURL, a.getTrace())
+		a.setClient(newClient)
+		if !a.scheduler.UpdateClient(newClient) {
+			logger.LogEvent("配置", "warn", "抢购任务正在运行，客户端配置将在下次抢购时完整生效")
+		}
+		if sample, err := newClient.ServerTimeSample(); err == nil {
+			logger.SetDouyuOffset(sample.Offset)
+		} else {
+			logger.LogEvent("时间", "warn", "保存配置后服务端时间校准失败: %v", err)
+		}
+	}
 
 	logger.LogEvent("配置", "success", "配置已保存并生效: 日志等级=%s 并发=%d 重试=%d 重试阶段=%d 模式=%d trace=%v",
 		cfg.LogLevel, cfg.Concurrency, cfg.Attempts, len(cfg.RetryStages), cfg.SeckillMode, cfg.TraceEnabled)

internal/app/app_export.go

@@ -128,6 +128,9 @@ func (a *App) OrganizeAccounts(commodityID, commodityName string, startTime, end
 	var exportResult types.ExportAccountsResult
 	if len(hitAccounts) > 0 {
 		exportResult = a.ExportAccountsWithProduct(hitAccounts, commodityID, commodityName)
+		if !exportResult.Success {
+			return types.OrganizeAccountsResult{Error: "导出已抢到账号失败，已取消整理: " + exportResult.Error, ExportResult: exportResult}
+		}
 	}
 
 	// 更新原文件，只保留未抢到的
@@ -153,11 +156,13 @@ func (a *App) OrganizeAccounts(commodityID, commodityName string, startTime, end
 		}
 	}
 
-	// 写回原文件
-	newContent := strings.Join(keepLines, "\n") + "\n"
-	if err := os.WriteFile(accountFile, []byte(newContent), 0644); err != nil {
+	// 写回原文件前先备份，再用同目录临时文件替换，避免半写入损坏账号文件。
+	newContent := strings.Join(keepLines, "\r\n") + "\r\n"
+	backupPath, err := writeFileWithBackup(accountFile, []byte(newContent))
+	if err != nil {
 		return types.OrganizeAccountsResult{Error: "更新账号文件失败: " + err.Error()}
 	}
+	logger.LogEvent("整理", "success", "账号文件已安全更新，备份=%s", backupPath)
 
 	// 重新加载账号
 	a.scheduler.LoadAccounts()
@@ -173,3 +178,91 @@ func (a *App) OrganizeAccounts(commodityID, commodityName string, startTime, end
 		ExportResult: exportResult,
 	}
 }
+
+func writeFileWithBackup(path string, content []byte) (string, error) {
+	info, err := os.Stat(path)
+	if err != nil {
+		return "", err
+	}
+	mode := info.Mode().Perm()
+	if mode == 0 {
+		mode = 0644
+	}
+
+	original, err := os.ReadFile(path)
+	if err != nil {
+		return "", err
+	}
+	backupPath, err := createFileBackup(path, original, mode)
+	if err != nil {
+		return "", err
+	}
+	if err := replaceFileWithTemp(path, content, mode); err != nil {
+		return backupPath, err
+	}
+	return backupPath, nil
+}
+
+func createFileBackup(path string, content []byte, mode os.FileMode) (string, error) {
+	timestamp := time.Now().Format("20060102_150405.000")
+	basePath := filepath.Join(filepath.Dir(path), filepath.Base(path)+"."+timestamp+".bak")
+	for i := 0; i < 100; i++ {
+		backupPath := basePath
+		if i > 0 {
+			backupPath = fmt.Sprintf("%s.%d", basePath, i)
+		}
+		file, err := os.OpenFile(backupPath, os.O_WRONLY|os.O_CREATE|os.O_EXCL, mode)
+		if os.IsExist(err) {
+			continue
+		}
+		if err != nil {
+			return "", err
+		}
+		if _, err := file.Write(content); err != nil {
+			_ = file.Close()
+			_ = os.Remove(backupPath)
+			return "", err
+		}
+		if err := file.Close(); err != nil {
+			_ = os.Remove(backupPath)
+			return "", err
+		}
+		return backupPath, nil
+	}
+	return "", fmt.Errorf("备份文件名连续冲突: %s", basePath)
+}
+
+func replaceFileWithTemp(path string, content []byte, mode os.FileMode) error {
+	dir := filepath.Dir(path)
+	tmp, err := os.CreateTemp(dir, "."+filepath.Base(path)+".*.tmp")
+	if err != nil {
+		return err
+	}
+	tmpPath := tmp.Name()
+	defer func() {
+		if tmpPath != "" {
+			_ = os.Remove(tmpPath)
+		}
+	}()
+
+	if _, err := tmp.Write(content); err != nil {
+		_ = tmp.Close()
+		return err
+	}
+	if err := tmp.Chmod(mode); err != nil {
+		_ = tmp.Close()
+		return err
+	}
+	if err := tmp.Sync(); err != nil {
+		_ = tmp.Close()
+		return err
+	}
+	if err := tmp.Close(); err != nil {
+		return err
+	}
+	if err := os.Rename(tmpPath, path); err != nil {
+		return err
+	}
+	tmpPath = ""
+	return nil
+}

internal/app/app_export_test.go

@@ -0,0 +1,53 @@
+package app
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func TestWriteFileWithBackup(t *testing.T) {
+	dir := t.TempDir()
+	path := filepath.Join(dir, "user.txt")
+	original := []byte("# 账号\r\nfoo----bar----cookie\r\n")
+	updated := []byte("# 账号\r\n")
+
+	if err := os.WriteFile(path, original, 0640); err != nil {
+		t.Fatalf("写入原始账号文件失败: %v", err)
+	}
+
+	backupPath, err := writeFileWithBackup(path, updated)
+	if err != nil {
+		t.Fatalf("writeFileWithBackup 返回错误: %v", err)
+	}
+	if backupPath == "" {
+		t.Fatal("backupPath 为空")
+	}
+
+	got, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatalf("读取更新后账号文件失败: %v", err)
+	}
+	if string(got) != string(updated) {
+		t.Fatalf("更新后账号文件内容 = %q, want %q", got, updated)
+	}
+
+	backup, err := os.ReadFile(backupPath)
+	if err != nil {
+		t.Fatalf("读取备份文件失败: %v", err)
+	}
+	if string(backup) != string(original) {
+		t.Fatalf("备份文件内容 = %q, want %q", backup, original)
+	}
+
+	entries, err := os.ReadDir(dir)
+	if err != nil {
+		t.Fatalf("读取临时目录失败: %v", err)
+	}
+	for _, entry := range entries {
+		if strings.HasSuffix(entry.Name(), ".tmp") {
+			t.Fatalf("发现残留临时文件: %s", entry.Name())
+		}
+	}
+}

internal/client/client.go

@@ -36,6 +36,9 @@ func New(act *activity.Activity, timeAPIURL string, tr *trace.Recorder) *DouyuCl
 	if timeAPIURL == "" {
 		timeAPIURL = constants.DefaultTimeAPI
 	}
+	if tr == nil {
+		tr = &trace.Recorder{}
+	}
 	return &DouyuClient{
 		Activity:   act,
 		TimeAPIURL: timeAPIURL,

internal/logger/logger.go

@@ -53,6 +53,7 @@ func levelPriority(level string) int {
 
 // AsyncLogWriter 异步日志写入器，队列满时丢弃日志以保护主链路。
 type AsyncLogWriter struct {
+	mu      sync.RWMutex
 	dst     io.Writer
 	ch      chan []byte
 	wg      sync.WaitGroup
@@ -79,6 +80,8 @@ func (w *AsyncLogWriter) Write(p []byte) (int, error) {
 	if w == nil {
 		return len(p), nil
 	}
+	w.mu.RLock()
+	defer w.mu.RUnlock()
 	if atomic.LoadUint32(&w.closed) == 1 {
 		return len(p), nil
 	}
@@ -106,6 +109,8 @@ func (w *AsyncLogWriter) Close() error {
 	if w == nil {
 		return nil
 	}
+	w.mu.Lock()
+	defer w.mu.Unlock()
 	if atomic.CompareAndSwapUint32(&w.closed, 0, 1) {
 		close(w.ch)
 		w.wg.Wait()

internal/seckill/scheduler.go

@@ -71,6 +71,8 @@ type Scheduler struct {
 
 	runMu   sync.Mutex
 	running bool
+	// pendingClient 保存运行中收到的客户端更新，当前任务结束后自动应用。
+	pendingClient *client.DouyuClient
 
 	scheduleMu     sync.Mutex
 	schedule       *time.Timer
@@ -133,15 +135,24 @@ func (s *Scheduler) clientSnapshot() *client.DouyuClient {
 }
 
 // UpdateClient 热替换底层 HTTP 客户端（用于活动切换）。
-// 若有抢购任务正在运行则拒绝替换，返回 false。
+// 若有抢购任务正在运行则暂存新客户端，当前任务结束后自动应用，并返回 false。
 func (s *Scheduler) UpdateClient(newClient *client.DouyuClient) bool {
 	s.runMu.Lock()
 	if s.running {
+		if s.pendingClient != nil && s.pendingClient.HTTPClient != nil {
+			s.pendingClient.HTTPClient.CloseIdleConnections()
+		}
+		s.pendingClient = newClient
 		s.runMu.Unlock()
 		return false
 	}
 	s.runMu.Unlock()
 
+	s.replaceClient(newClient)
+	return true
+}
+
+func (s *Scheduler) replaceClient(newClient *client.DouyuClient) {
 	s.clientMu.Lock()
 	defer s.clientMu.Unlock()
 	old := s.client
@@ -149,7 +160,6 @@ func (s *Scheduler) UpdateClient(newClient *client.DouyuClient) bool {
 	if old != nil && old.HTTPClient != nil {
 		old.HTTPClient.CloseIdleConnections()
 	}
-	return true
 }
 
 // UpdateProducts 更新商品缓存，抢购成功图片会优先使用中文商品名。
@@ -289,8 +299,15 @@ func (s *Scheduler) TryStartRun() bool {
 
 func (s *Scheduler) finishRun() {
 	s.runMu.Lock()
-	defer s.runMu.Unlock()
 	s.running = false
+	pendingClient := s.pendingClient
+	s.pendingClient = nil
+	s.runMu.Unlock()
+
+	if pendingClient != nil {
+		s.replaceClient(pendingClient)
+		logger.LogEvent("配置", "success", "抢购任务结束，已应用等待中的客户端配置")
+	}
 }
 
 // RunNow 立即执行抢购任务，持续循环直到超时或全部成功。