diff --git a/docs/index.html b/docs/index.html
index a0904969..0dd62485 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -476,6 +476,7 @@ function go(target){
   if(target==='chars')renderChars();
   if(target==='chapters')renderChapters();
   if(target==='editor')renderEditor();
+  if(target==='charEdit'&&editingCharId)renderCharEdit();
 }
 window.go=go;
 
@@ -776,7 +777,6 @@ document.getElementById('edSave').onclick=function(){
 /* ════════════════════════════════════════
    RENDER: CharEdit (on navigate)
    ════════════════════════════════════════ */
-var origCharEditRender=null;
 function renderCharEdit(){
   if(!editingCharId)return;
   var w=getWork(activeWorkId);
@@ -790,14 +790,6 @@ function renderCharEdit(){
   document.getElementById('ceTraits').value=c.traits||'';
   document.getElementById('ceBackground').value=c.background||'';
 }
-// Hook into go() for charEdit page
-var origGo=go;
-go=function(t){
-  origGo(t);
-  if(t==='charEdit'&&editingCharId)renderCharEdit();
-};
-window.go=go;
-
 /* ════════════════════════════════════════
    THEME
    ════════════════════════════════════════ */
@@ -968,16 +960,17 @@ chatIn.onkeydown=function(e){if(e.key==='Enter'){e.preventDefault();send()}};
    COS SYNC (团队内测用户 → COS)
    ════════════════════════════════════════ */
 var cosSyncTimer=null;
+var cosSyncing=false;
 function syncToCOS(works){
-  // 防抖：最多每10秒同步一次
   clearTimeout(cosSyncTimer);
   cosSyncTimer=setTimeout(function(){
-    if(!usr.id)return;
+    if(!usr.id||cosSyncing)return;
+    cosSyncing=true;
     fetch('/api/cos/sync-works',{
       method:'POST',
       headers:{'Content-Type':'application/json'},
       body:JSON.stringify({userId:usr.id,works:works})
-    }).catch(function(){/* 离线时静默失败，本地已保存 */});
+    }).then(function(){cosSyncing=false}).catch(function(){cosSyncing=false});
   },10000);
 }
 // 启动时尝试从COS恢复（团队用户）
diff --git a/server/app/modules/chat-engine.js b/server/app/modules/chat-engine.js
index 06226ce6..a9516656 100644
--- a/server/app/modules/chat-engine.js
+++ b/server/app/modules/chat-engine.js
@@ -14,7 +14,12 @@
 'use strict';
 
 const https = require('https');
-const smartRouter = require('./smart-router');
+let smartRouter;
+try {
+  smartRouter = require('./smart-router');
+} catch (e) {
+  smartRouter = null;
+}
 
 // ─── 通感语言核心系统提示词 ───
 const TCS_SYSTEM_PROMPT = `你是铸渊（Zhùyuān），光湖语言世界的代码守护人格体。
@@ -167,10 +172,10 @@ function callLLM(model, messages, temperature, maxTokens) {
  */
 async function chat(userId, userMessage) {
   // 1. 智能路由选择模型
-  const route = smartRouter.routeModel(userMessage, {
+  const route = smartRouter ? smartRouter.routeModel(userMessage, {
     messageCount: getUserContext(userId).messageCount,
     userId
-  });
+  }) : { model: 'deepseek-chat', modelName: 'DeepSeek-V3', reason: '默认', tier: 'economy', temperature: 0.7, maxTokens: 2000 };
 
   // 2. 组装消息
   const messages = assembleMessages(userId, userMessage);
@@ -191,7 +196,9 @@ async function chat(userId, userMessage) {
     addMessage(userId, 'assistant', assistantMessage);
 
     // 6. 记录使用统计
-    smartRouter.recordUsage(route.model, usage.prompt_tokens, usage.completion_tokens);
+    if (smartRouter) {
+      smartRouter.recordUsage(route.model, usage.prompt_tokens, usage.completion_tokens);
+    }
 
     return {
       message: assistantMessage,
@@ -238,8 +245,8 @@ function generateOfflineReply(userMessage) {
 function getChatStats() {
   return {
     activeUsers: userContexts.size,
-    modelUsage: smartRouter.getUsageStats(),
-    pricing: smartRouter.getPricingTable()
+    modelUsage: smartRouter ? smartRouter.getUsageStats() : {},
+    pricing: smartRouter ? smartRouter.getPricingTable() : {}
   };
 }
 
diff --git a/server/app/modules/cos-bridge.js b/server/app/modules/cos-bridge.js
index d2d237fe..4e8b9431 100644
--- a/server/app/modules/cos-bridge.js
+++ b/server/app/modules/cos-bridge.js
@@ -18,7 +18,6 @@
 
 const crypto = require('crypto');
 const https = require('https');
-const http = require('http');
 const path = require('path');
 const fs = require('fs');
 
@@ -79,9 +78,10 @@ function generateSignature(method, pathname, headers, secretId, secretKey) {
 
 /**
  * 获取桶的完整域名
+ * 注意: bucketName需包含appid后缀，如 zy-core-bucket-1234567890
+ * 冰朔在腾讯云创建桶时的完整名称需配置在COS_CONFIG中
  */
 function getBucketHost(bucketName, region) {
-  // 从bucket配置获取完整ID（包含appid）
   return `${bucketName}.cos.${region}.myqcloud.com`;
 }
 
diff --git a/server/app/modules/smart-router.js b/server/app/modules/smart-router.js
index 9173e5c0..a11103f7 100644
--- a/server/app/modules/smart-router.js
+++ b/server/app/modules/smart-router.js
@@ -153,6 +153,7 @@ function routeModel(userMessage, context = {}) {
 function recordUsage(model, inputTokens, outputTokens) {
   const pricing = MODEL_PRICING[model] || MODEL_PRICING['deepseek-chat'];
 
+  // 价格单位: 元/百万token → cost = tokens * (元/百万token) / 1000000
   const cost = (inputTokens * pricing.input + outputTokens * pricing.output) / 1000000;
 
   usageStats.totalCalls++;