refactor(sniper): 对齐 dygou_go 调度架构，增加双时间日志并解耦预热

- 抢购调度重构：参考 dygou_go 将 sniper 拆分为独立子模块（runner/run_control/retry/exchange/classify/config/summary/category/helpers）；移除全局自适应降速与轮次上限，采用账号独立循环、统一账号级退避、单请求并发闸门与首发错峰
- 预热与建连优化：默认关闭预热（避免单账号超时连坐整机开抢），开启时转为后台非阻塞协程；WebSocket 握手超时从 10s 降至 1500ms
- 双时间日志：logger 增加 SetServerOffset，校准后日志前缀自动渲染「本地时间(H虎牙估算时间)」，实现跨机器绝对毫秒对齐
- 默认配置调优：版本提升至 v0.5.0，默认线程调为 2（缓解多实例并发限流），前端自动平滑迁移
- 验证方式：go test ./... -count=1 全通，npm run build 构建正常，单测覆盖双时间与预热配置

frontend/src/App.tsx

@@ -61,8 +61,12 @@ const configStorageBase = 'huya-go.gui.config.v2'
 const cookieStorageBase = 'huya-go.gui.cookies.v1'
 const prizeCacheStorageBase = 'huya-go.gui.prizes.v1'
 const leadDefaultMigrationBase = 'huya-go.gui.lead-default.v1'
-// 旧版本默认把提前量写成 2500ms，与现在的动态提前设计冲突；只迁移一次。
+// 旧版本默认把提前量写成 2500ms、线程写成 5。轮次上限已从产品移除；
+// 线程 5 在多开时会放大请求洪峰，旧默认只迁移一次。
 const legacyDefaultLeadMs = 2500
+const concurrencyDefaultMigrationBase = 'huya-go.gui.concurrency-pressure.v1'
+const legacyDefaultConcurrency = 5
+const defaultConcurrency = 2
 
 // 界面本地存储保留的日志上限，与后端的增量拉取配合使用。
 const maxClientLogs = 1000
@@ -102,8 +106,6 @@ type UiConfig = {
   minLeft: number
   cookieText: string
   selectedAccountLines: number[]
-  // loops 是轮次上限：0（留空）表示按窗口运行到窗口结束。
-  loops: number
   delayMs: number
   concurrency: number
   // windowSeconds 是抢购窗口秒数（窗口模式下跑到「开抢+窗口」才收工）。
@@ -122,10 +124,6 @@ type UiConfig = {
   errorBackoffMs: number
   timeoutSec: number
   startAt: string
-  // adaptiveThrottle 是「全局自适应降速」开关（表单用正语义）。
-  adaptiveThrottle: boolean
-  // disableAdaptiveThrottle 只发给后端（后端零值=开启，所以用反语义字段），不落本地存储。
-  disableAdaptiveThrottle: boolean
 }
 
 type CookieCheckStatus = 'valid' | 'expired' | 'unknown' | 'invalid'
@@ -331,7 +329,7 @@ function exchangeOrderID(exchange?: ExchangeResp): string {
   return exchange?.order_id || exchange?.orderId || ''
 }
 
-type SavedConfig = Omit<UiConfig, 'cookieText' | 'selectedAccountLines' | 'disableAdaptiveThrottle'>
+type SavedConfig = Omit<UiConfig, 'cookieText' | 'selectedAccountLines'>
 
 type ScheduleCountdown = {
   targetAt: number
@@ -535,14 +533,47 @@ function readSavedConfig(): Partial<SavedConfig> {
   try {
     const configKey = scopedKey(configStorageBase)
     const saved = JSON.parse(localStorage.getItem(configKey) || '{}') as Partial<SavedConfig>
-    const migrationKey = scopedKey(leadDefaultMigrationBase)
-    if (!localStorage.getItem(migrationKey)) {
+    let dirty = false
+
+    // v0.5.0 移除了轮次和全局降速器配置，顺手清掉本地旧字段。
+    const legacyFields = saved as Record<string, unknown>
+    for (const key of ['loops', 'adaptiveThrottle', 'disableAdaptiveThrottle']) {
+      if (key in legacyFields) {
+        delete legacyFields[key]
+        dirty = true
+      }
+    }
+
+    const leadMigrationKey = scopedKey(leadDefaultMigrationBase)
+    if (!localStorage.getItem(leadMigrationKey)) {
       if (Number(saved.leadMs || 0) === legacyDefaultLeadMs) {
         saved.leadMs = 0
-        // 迁移必须立即落盘，否则下一次 readSavedConfig 又会读回旧值。
-        localStorage.setItem(configKey, JSON.stringify(saved))
+        dirty = true
       }
-      localStorage.setItem(migrationKey, '1')
+      localStorage.setItem(leadMigrationKey, '1')
+    }
+
+    const concurrencyMigrationKey = scopedKey(concurrencyDefaultMigrationBase)
+    if (!localStorage.getItem(concurrencyMigrationKey)) {
+      if (Number(saved.concurrency || 0) === legacyDefaultConcurrency) {
+        saved.concurrency = defaultConcurrency
+        dirty = true
+      }
+      localStorage.setItem(concurrencyMigrationKey, '1')
+    }
+
+    const prewarmMigrationKey = scopedKey('huya_gui_prewarm_default_migration_v050')
+    if (!localStorage.getItem(prewarmMigrationKey)) {
+      if (saved.prewarm !== false) {
+        saved.prewarm = false
+        dirty = true
+      }
+      localStorage.setItem(prewarmMigrationKey, '1')
+    }
+
+    if (dirty) {
+      // 迁移必须立即落盘，否则下一次 readSavedConfig 又会读回旧值。
+      localStorage.setItem(configKey, JSON.stringify(saved))
     }
     return saved
   } catch {
@@ -656,13 +687,12 @@ function pickConfig(values: Partial<UiConfig>): UiConfig {
     minLeft: Number(values.minLeft || 0),
     cookieText: values.cookieText || '',
     selectedAccountLines: values.selectedAccountLines || [],
-    loops: Number(values.loops || 0),
     delayMs: Number(values.delayMs || 150),
-    concurrency: Number(values.concurrency || 1),
+    concurrency: Number(values.concurrency || defaultConcurrency),
     windowSeconds: Number(values.windowSeconds || 30),
     stopAfterSuccess: Boolean(values.stopAfterSuccess),
     stopAccountAfterSuccess: values.stopAccountAfterSuccess !== false,
-    prewarm: values.prewarm !== false,
+    prewarm: Boolean(values.prewarm),
     directExchange: values.directExchange !== false,
     sharePrizeList: values.sharePrizeList !== false,
     autoSelect: Boolean(values.autoSelect),
@@ -673,8 +703,6 @@ function pickConfig(values: Partial<UiConfig>): UiConfig {
     errorBackoffMs: Number(values.errorBackoffMs || 300),
     timeoutSec: Number(values.timeoutSec || 15),
     startAt: values.startAt || '',
-    adaptiveThrottle: values.adaptiveThrottle !== false,
-    disableAdaptiveThrottle: values.adaptiveThrottle === false,
   }
 }
 
@@ -1340,7 +1368,6 @@ export default function Dashboard() {
       targetText: values.targetText,
       maxPrice: values.maxPrice,
       minLeft: values.minLeft,
-      loops: values.loops,
       delayMs: values.delayMs,
       concurrency: values.concurrency,
       windowSeconds: values.windowSeconds,
@@ -1357,7 +1384,6 @@ export default function Dashboard() {
       errorBackoffMs: values.errorBackoffMs,
       timeoutSec: values.timeoutSec,
       startAt: values.startAt,
-      adaptiveThrottle: values.adaptiveThrottle,
     }
     localStorage.setItem(scopedKey(configStorageBase), JSON.stringify(saved))
     message.success('已保存')
@@ -2267,16 +2293,13 @@ export default function Dashboard() {
             <Form.Item name="minLeft" label="最少库存">
               <InputNumber min={0} />
             </Form.Item>
-            <Form.Item name="loops" label="次数上限" tooltip="留空或 0 = 按窗口运行到窗口结束；填了就作为轮次上限">
-              <InputNumber min={0} max={9999} placeholder="0=按窗口" />
-            </Form.Item>
-            <Form.Item name="windowSeconds" label="窗口秒" tooltip="窗口模式下跑到「开抢 + 窗口秒数」才收工；开抢后约 9 秒内库存就会见底，默认 30 秒留足库存回流余量">
+            <Form.Item name="windowSeconds" label="窗口秒" tooltip="跑到「开抢 + 窗口秒数」才收工；账号会在整个窗口内独立重试，直到成功、窗口结束或收到停止指令">
               <InputNumber min={1} max={600} addonAfter="s" />
             </Form.Item>
             <Form.Item name="delayMs" label="延时">
               <InputNumber min={10} max={60000} addonAfter="ms" />
             </Form.Item>
-            <Form.Item name="concurrency" label="线程">
+            <Form.Item name="concurrency" label="线程" tooltip="同时在途请求上限，不是账号槽位；多开时同机总速率约为线程×实例数，限流严重时建议 1~2">
               <InputNumber min={1} max={100} />
             </Form.Item>
             <Form.Item name="leadMs" label="提前" tooltip="留空或 0 = 按服务端时钟校准误差动态计算（通常几十毫秒）；填了就用固定提前量">
@@ -2284,7 +2307,12 @@ export default function Dashboard() {
             </Form.Item>
           </div>
           <div className="settings-switch-grid">
-            <Form.Item name="prewarm" label="预热" valuePropName="checked">
+            <Form.Item
+              name="prewarm"
+              label="预热"
+              valuePropName="checked"
+              tooltip="默认关闭。开启时在后台异步建连，绝不阻塞主发令枪；不预热时首发自动建连并配合提前量放行"
+            >
               <Switch />
             </Form.Item>
             <Form.Item name="directExchange" label="直兑" valuePropName="checked">
@@ -2305,9 +2333,6 @@ export default function Dashboard() {
             <Form.Item name="timeSync" label="时间校准" valuePropName="checked" tooltip="定时前用 pingSignal 校准服务端时间，按钟差对齐触发时刻">
               <Switch />
             </Form.Item>
-            <Form.Item name="adaptiveThrottle" label="自适应降速" valuePropName="checked" tooltip="连续十几个请求都拿不到业务响应时整体降速，缓解同机同 IP 的限流风暴">
-              <Switch />
-            </Form.Item>
           </div>
         </div>
       </Modal>