更新ContractData接口以使extendFields可选并修改相关序列化逻辑。增强数据库模式以支持extendFields作为JSON字符串，并确保在数据操作期间进行正确处理。改进ContactManager中的比较逻辑以包含extendFields。

Touchkebao/src/utils/db.ts

@@ -62,6 +62,7 @@ export interface ChatSession {
   notice?: string; // 群公告
   phone?: string; // 联系人电话
   region?: string; // 联系人地区
+  extendFields?: string; // 扩展字段（JSON 字符串）
 }
 
 // ==================== 统一联系人表（兼容好友和群聊） ====================
@@ -92,6 +93,7 @@ export interface Contact {
   signature?: string; // 个性签名
   phone?: string; // 手机号
   quanPin?: string; // 全拼
+  extendFields?: string; // 扩展字段（JSON 字符串）
 
   // 群聊特有字段（type='group'时有效）
   chatroomId?: string; // 群聊ID
@@ -147,6 +149,41 @@ class CunkebaoDatabase extends Dexie {
       userLoginRecords:
         "serverId, userId, lastLoginTime, loginCount, createTime, lastActiveTime",
     });
+
+    this.version(2)
+      .stores({
+        chatSessions:
+          "serverId, userId, id, type, wechatAccountId, [userId+type], [userId+wechatAccountId], [userId+lastUpdateTime], [userId+aiType], sortKey, nickname, conRemark, avatar, content, lastUpdateTime, aiType, phone, region, extendFields",
+        contactsUnified:
+          "serverId, userId, id, type, wechatAccountId, [userId+type], [userId+wechatAccountId], [userId+aiType], sortKey, searchKey, nickname, conRemark, avatar, lastUpdateTime, groupId, aiType, phone, region, extendFields",
+        contactLabelMap:
+          "serverId, userId, labelId, contactId, contactType, [userId+labelId], [userId+contactId], [userId+labelId+sortKey], sortKey, searchKey, avatar, nickname, conRemark, unreadCount, lastUpdateTime",
+        userLoginRecords:
+          "serverId, userId, lastLoginTime, loginCount, createTime, lastActiveTime",
+      })
+      .upgrade(async tx => {
+        await tx
+          .table("chatSessions")
+          .toCollection()
+          .modify(session => {
+            if (!("extendFields" in session) || session.extendFields == null) {
+              session.extendFields = "{}";
+            } else if (typeof session.extendFields !== "string") {
+              session.extendFields = JSON.stringify(session.extendFields);
+            }
+          });
+
+        await tx
+          .table("contactsUnified")
+          .toCollection()
+          .modify(contact => {
+            if (!("extendFields" in contact) || contact.extendFields == null) {
+              contact.extendFields = "{}";
+            } else if (typeof contact.extendFields !== "string") {
+              contact.extendFields = JSON.stringify(contact.extendFields);
+            }
+          });
+      });
   }
 }
 
@@ -295,18 +332,18 @@ export class DatabaseService<T> {
 
   // 基础 CRUD 操作 - 使用serverId作为主键
   async create(data: Omit<T, "serverId">): Promise<string | number> {
-    return await this.table.add(data as T);
+    return await this.table.add(this.prepareDataForWrite(data) as T);
   }
 
   // 创建数据（直接使用接口数据）
   // 接口数据的id字段直接作为serverId主键，原id字段保留
   async createWithServerId(data: any): Promise<string | number> {
-    const dataToInsert = {
+    const dataToInsert = this.prepareDataForWrite({
       ...data,
       serverId: data.id, // 使用接口的id作为serverId主键
       phone: data.phone ?? "",
       region: data.region ?? "",
-    };
+    });
     return await this.table.add(dataToInsert as T);
   }
 
@@ -325,7 +362,10 @@ export class DatabaseService<T> {
   }
 
   async update(serverId: string | number, data: Partial<T>): Promise<number> {
-    return await this.table.update(serverId, data as any);
+    return await this.table.update(
+      serverId,
+      this.prepareDataForWrite(data) as any,
+    );
   }
 
   async updateMany(
@@ -334,7 +374,7 @@ export class DatabaseService<T> {
     return await this.table.bulkUpdate(
       dataList.map(item => ({
         key: item.serverId,
-        changes: item.data as any,
+        changes: this.prepareDataForWrite(item.data) as any,
       })),
     );
   }
@@ -342,7 +382,8 @@ export class DatabaseService<T> {
   async createMany(
     dataList: Omit<T, "serverId">[],
   ): Promise<(string | number)[]> {
-    return await this.table.bulkAdd(dataList as T[], { allKeys: true });
+    const processed = dataList.map(item => this.prepareDataForWrite(item));
+    return await this.table.bulkAdd(processed as T[], { allKeys: true });
   }
 
   // 批量创建数据（直接使用接口数据）
@@ -366,12 +407,14 @@ export class DatabaseService<T> {
       return [];
     }
 
-    const processedData = newData.map(item => ({
-      ...item,
-      serverId: item.id, // 使用接口的id作为serverId主键
-      phone: item.phone ?? "",
-      region: item.region ?? "",
-    }));
+    const processedData = newData.map(item =>
+      this.prepareDataForWrite({
+        ...item,
+        serverId: item.id, // 使用接口的id作为serverId主键
+        phone: item.phone ?? "",
+        region: item.region ?? "",
+      }),
+    );
 
     return await this.table.bulkAdd(processedData as T[], { allKeys: true });
   }
@@ -545,6 +588,27 @@ export class DatabaseService<T> {
       .equals(value)
       .count();
   }
+
+  private prepareDataForWrite(data: any) {
+    if (!data || typeof data !== "object") {
+      return data;
+    }
+
+    const prepared = { ...data };
+
+    if ("extendFields" in prepared) {
+      const value = prepared.extendFields;
+      if (typeof value === "string" && value.trim() !== "") {
+        prepared.extendFields = value;
+      } else if (value && typeof value === "object") {
+        prepared.extendFields = JSON.stringify(value);
+      } else {
+        prepared.extendFields = "{}";
+      }
+    }
+
+    return prepared;
+  }
 }
 
 // 创建统一表的服务实例