feat: 重构知识库系统，移除Hermes集成，增强RAG和同步功能

主要变更:
- 移除Hermes智能体及相关回调服务
- 新增知识库RAG、同步、调度、规范化和索引任务服务
- 重构orchestrator服务，增强运行时聊天功能
- 更新前端聊天、政策制度、设置等页面样式和逻辑
- 更新expense_claims和document_intelligence服务
- 删除llm_wiki相关服务和测试文件
- 更新docker-compose配置和启动脚本

web/src/assets/styles/views/policies-view.css

@@ -98,11 +98,11 @@
   margin-top: 16px;
 }
 
-.folder-rail {
-  min-height: 0;
-  display: grid;
-  grid-template-rows: minmax(0, 1fr) auto;
-  gap: 12px;
+.folder-rail {
+  min-height: 0;
+  display: grid;
+  grid-template-rows: minmax(0, 1fr) auto;
+  gap: 12px;
   border-right: 1px solid #edf2f7;
   padding-right: 12px;
 }
@@ -136,21 +136,26 @@
   font-weight: 850;
 }
 
-.folder-tree b {
-  min-width: 24px;
-  height: 20px;
-  display: inline-flex;
+.folder-tree b {
+  min-width: 24px;
+  height: 20px;
+  display: inline-flex;
   align-items: center;
   justify-content: center;
   border-radius: 999px;
   background: #f1f5f9;
-  color: #64748b;
-  font-size: 11px;
-}
-
-.new-folder-btn {
-  min-height: 36px;
-  display: inline-flex;
+  color: #64748b;
+  font-size: 11px;
+}
+
+.folder-sync-block {
+  display: grid;
+  gap: 8px;
+}
+
+.new-folder-btn {
+  min-height: 36px;
+  display: inline-flex;
   align-items: center;
   justify-content: center;
   gap: 8px;
@@ -162,11 +167,27 @@
   font-weight: 850;
 }
 
-.new-folder-btn.fixed {
-  border-color: rgba(148, 163, 184, 0.3);
-  background: #f8fafc;
-  color: #64748b;
-}
+.new-folder-btn.fixed {
+  border-color: rgba(148, 163, 184, 0.3);
+  background: #f8fafc;
+  color: #64748b;
+}
+
+.knowledge-sync-btn:not(:disabled) {
+  cursor: pointer;
+}
+
+.knowledge-sync-btn:not(:disabled):hover {
+  border-color: rgba(16, 185, 129, 0.38);
+  background: #ecfdf5;
+  color: #047857;
+}
+
+.folder-sync-meta {
+  color: #64748b;
+  font-size: 12px;
+  line-height: 1.6;
+}
 
 .document-area {
   min-width: 0;
@@ -339,6 +360,19 @@ th {
   background: #fee2e2;
   color: #dc2626;
 }
+
+.state-cell {
+  display: grid;
+  justify-items: center;
+  gap: 6px;
+}
+
+.state-time {
+  color: #64748b;
+  font-size: 11px;
+  line-height: 1.4;
+  white-space: nowrap;
+}
 
 .more-btn {
   width: 32px;