refactor(backend): 重构动物相关 API 接口

- 更新了动物数据结构和相关类型定义
- 优化了动物列表、详情、创建、更新和删除接口
- 新增了更新动物状态接口
- 移除了与认领记录相关的接口
-调整了 API 响应结构

backend/src/models/UserMySQL.js

@@ -4,30 +4,30 @@ class UserMySQL {
   // 创建用户
   static async create(userData) {
     const {
-      openid,
-      nickname,
-      avatar = '',
-      gender = 'other',
-      birthday = null,
-      phone = null,
-      email = null
+      username,
+      password_hash,
+      user_type = 'farmer',
+      real_name = '',
+      avatar_url = '',
+      email = null,
+      phone = null
     } = userData;
 
     const sql = `
       INSERT INTO users (
-        openid, nickname, avatar, gender, birthday, phone, email,
+        username, password_hash, user_type, real_name, avatar_url, email, phone,
         created_at, updated_at
       ) VALUES (?, ?, ?, ?, ?, ?, ?, NOW(), NOW())
     `;
 
     const params = [
-      openid,
-      nickname,
-      avatar,
-      gender,
-      birthday,
-      phone,
-      email
+      username,
+      password_hash,
+      user_type,
+      real_name,
+      avatar_url,
+      email,
+      phone
     ];
 
     const result = await query(sql, params);
@@ -41,10 +41,10 @@ class UserMySQL {
     return rows[0] || null;
   }
 
-  // 根据openid查找用户
-  static async findByOpenid(openid) {
-    const sql = 'SELECT * FROM users WHERE openid = ?';
-    const rows = await query(sql, [openid]);
+  // 根据用户名查找用户
+  static async findByUsername(username) {
+    const sql = 'SELECT * FROM users WHERE username = ?';
+    const rows = await query(sql, [username]);
     return rows[0] || null;
   }
 
@@ -101,10 +101,10 @@ class UserMySQL {
     return result.affectedRows > 0;
   }
 
-  // 检查openid是否已存在
-  static async isOpenidExists(openid, excludeId = null) {
-    let sql = 'SELECT COUNT(*) as count FROM users WHERE openid = ?';
-    const params = [openid];
+  // 检查用户名是否已存在
+  static async isUsernameExists(username, excludeId = null) {
+    let sql = 'SELECT COUNT(*) as count FROM users WHERE username = ?';
+    const params = [username];
 
     if (excludeId) {
       sql += ' AND id != ?';
@@ -115,6 +115,17 @@ class UserMySQL {
     return rows[0].count > 0;
   }
 
+  // 检查用户状态是否活跃
+  static isActive(user) {
+    return user.status === 'active';
+  }
+
+  // 执行原始查询（用于复杂查询）
+  static async query(sql, params = []) {
+    const { query } = require('../config/database');
+    return await query(sql, params);
+  }
+
   // 检查邮箱是否已存在
   static async isEmailExists(email, excludeId = null) {
     let sql = 'SELECT COUNT(*) as count FROM users WHERE email = ?';
@@ -143,9 +154,18 @@ class UserMySQL {
     return rows[0].count > 0;
   }
 
-  // 检查用户名是否已已存在 (根据openid检查)
+  // 检查用户名是否已存在
   static async isUsernameExists(username, excludeId = null) {
-    return await this.isOpenidExists(username, excludeId);
+    let sql = 'SELECT COUNT(*) as count FROM users WHERE username = ?';
+    const params = [username];
+
+    if (excludeId) {
+      sql += ' AND id != ?';
+      params.push(excludeId);
+    }
+
+    const rows = await query(sql, params);
+    return rows[0].count > 0;
   }
 
   // 安全返回用户信息（去除敏感信息）

backend/src/models/admin.js

@@ -0,0 +1,88 @@
+// 管理员模型
+const { adminDB } = require('../config/database');
+const bcrypt = require('bcryptjs');
+
+class Admin {
+  constructor(data) {
+    this.id = data.id;
+    this.username = data.username;
+    this.password = data.password;
+    this.email = data.email;
+    this.nickname = data.nickname;
+    this.avatar = data.avatar;
+    this.role = data.role;
+    this.status = data.status;
+    this.last_login = data.last_login;
+    this.created_at = data.created_at;
+    this.updated_at = data.updated_at;
+  }
+
+  // 根据用户名查找管理员
+  static async findByUsername(username) {
+    const adminData = await adminDB.findByUsername(username);
+    return adminData ? new Admin(adminData) : null;
+  }
+
+  // 根据ID查找管理员
+  static async findById(id) {
+    const adminData = await adminDB.findById(id);
+    return adminData ? new Admin(adminData) : null;
+  }
+
+  // 验证密码
+  async verifyPassword(password) {
+    return await bcrypt.compare(password, this.password);
+  }
+
+  // 更新最后登录时间
+  async updateLastLogin() {
+    await adminDB.updateLastLogin(this.id);
+  }
+
+  // 创建管理员
+  static async create(adminData) {
+    // 密码加密
+    if (adminData.password) {
+      adminData.password = await bcrypt.hash(adminData.password, 10);
+    }
+    
+    const id = await adminDB.create(adminData);
+    return await this.findById(id);
+  }
+
+  // 更新管理员信息
+  async update(updateData) {
+    // 如果有密码更新，需要加密
+    if (updateData.password) {
+      updateData.password = await bcrypt.hash(updateData.password, 10);
+    }
+    
+    await adminDB.update(this.id, updateData);
+    
+    // 更新实例数据
+    Object.assign(this, updateData);
+  }
+
+  // 删除管理员
+  async delete() {
+    await adminDB.delete(this.id);
+  }
+
+  // 转换为安全对象（不包含密码等敏感信息）
+  toSafeObject() {
+    return {
+      id: this.id,
+      username: this.username,
+      email: this.email,
+      nickname: this.nickname,
+      avatar: this.avatar,
+      role: this.role,
+      status: this.status,
+      last_login: this.last_login,
+      created_at: this.created_at,
+      updated_at: this.updated_at
+    };
+  }
+}
+
+module.exports = Admin;