refactor: 重构消息路由模块，添加个人规则管理功能

- 拆分消息处理逻辑到独立的 helper 模块
   - 新增个人规则的增删改查路由处理
   - 优化代码结构，提升可维护性

src/panels/helpers/messageRouter.ts

@@ -22,6 +22,12 @@ import {
   handleOpenFileDiff,
   startChangeSession,
 } from "../../utils/messageHandler";
+import {
+  loadPersonalRules,
+  savePersonalRule,
+  updatePersonalRule,
+  deletePersonalRule,
+} from "../../utils/personalRulesManager";
 import { compactDialog } from "../../services/apiClient";
 import { ChatHistoryManager } from "../../utils/chatHistoryManager";
 import { getCachedUserInfo } from "../../services/userService";
@@ -392,5 +398,63 @@ export async function handleWebviewMessage(
         vscode.env.openExternal(vscode.Uri.parse(message.url));
       }
       break;
+
+    case "loadPersonalRules":
+      {
+        const data = loadPersonalRules();
+        panel.webview.postMessage({
+          command: "personalRulesLoaded",
+          data: data,
+        });
+      }
+      break;
+
+    case "savePersonalRule":
+      {
+        const success = await savePersonalRule(
+          message.name,
+          message.content,
+          message.enabled,
+        );
+        if (success) {
+          const data = loadPersonalRules();
+          panel.webview.postMessage({
+            command: "personalRulesLoaded",
+            data: data,
+          });
+        }
+      }
+      break;
+
+    case "updatePersonalRule":
+      {
+        const success = await updatePersonalRule(
+          message.filename,
+          message.name,
+          message.content,
+          message.enabled,
+        );
+        if (success) {
+          const data = loadPersonalRules();
+          panel.webview.postMessage({
+            command: "personalRulesLoaded",
+            data: data,
+          });
+        }
+      }
+      break;
+
+    case "deletePersonalRule":
+      {
+        const success = await deletePersonalRule(message.filename);
+        if (success) {
+          const data = loadPersonalRules();
+          panel.webview.postMessage({
+            command: "personalRulesLoaded",
+            data: data,
+          });
+        }
+      }
+      break;
   }
 }