优化抖动幅度和日志双时间显示

- jitterDuration 抖动从 base/3 降至 base/10，避免过大的随机延迟
- 日志新增斗鱼双时间显示：本地时间后追加 (D斗鱼时间)，前端蓝色高亮
- 时间校准后自动同步斗鱼偏移量到日志模块

frontend/src/components/log/LogPanel.vue

@@ -157,6 +157,7 @@ const handleVerify = async () => {
         <template v-if="log.source === 'server'">
           <span class="log-prefix">[后端]</span>
           <span v-if="log.time" class="log-time">[{{ log.time }}]</span>
+          <span v-if="log.douyuTime" class="log-douyu-time">D:{{ log.douyuTime }}</span>
           <span v-if="log.category" class="log-cat">{{ log.category }}</span>
           <span v-if="log.account" class="log-account">{{ log.account }}</span>
           <span class="log-msg">{{ log.message }}</span>
@@ -363,6 +364,13 @@ const handleVerify = async () => {
   font-size: 10px;
 }
 
+.log-douyu-time {
+  color: var(--accent);
+  flex-shrink: 0;
+  font-size: 10px;
+  font-weight: 600;
+}
+
 .log-cat {
   display: inline-block;
   padding: 0 4px;

frontend/src/composables/useLogs.ts

@@ -12,6 +12,7 @@ export interface LogEntry {
 
 export interface LogMessage {
   time: string
+  douyuTime?: string
   type: 's' | 'e' | 'i' | 'w' | 'd'
   message: string
   category?: string
@@ -40,8 +41,15 @@ const formatServerLogTime = (time: string): string => {
   return match ? match[0] : value
 }
 
+// 从消息中提取斗鱼时间 (D16:25:00.047) 
+const extractDouyuTime = (message: string): string => {
+  const match = String(message || '').match(/\(D(\d{2}:\d{2}:\d{2}\.\d{3})\)/)
+  return match ? match[1] : ''
+}
+
 const cleanServerLogMessage = (message: string): string => {
   return String(message || '')
+    .replace(/^\d{4}\/\d{2}\/\d{2}\s+\d{2}:\d{2}:\d{2}(?:\.\d{3})?\s*\(D\d{2}:\d{2}:\d{2}\.\d{3}\)\s*/i, '')
     .replace(/^\d{4}\/\d{2}\/\d{2}\s+\d{2}:\d{2}:\d{2}(?:\.\d{3})?\s*/i, '')
     .replace(/\[[^\]]+\]\[(debug|info|success|warn|error)\]\s*/i, '')
     .replace(/^\[账号:[^\]]+\]\s*/i, '')
@@ -97,9 +105,11 @@ export function useLogs() {
 
         // 清理后端结构化前缀，时间/分类/账号由独立字段展示。
         const cleanMsg = cleanServerLogMessage(item.message)
+        const dyTime = extractDouyuTime(item.message)
 
         logs.value.push({
           time: formatServerLogTime(item.time || ''),
+          douyuTime: dyTime || undefined,
           type,
           message: cleanMsg,
           category: item.category,