新增分享码日志管理，美化界面，优化代码上传脚本

backend/src/models/ShareCodeLog.js

@@ -0,0 +1,59 @@
+const { DataTypes } = require('sequelize');
+const sequelize = require('../config/database');
+
+const ShareCodeLog = sequelize.define('ShareCodeLog', {
+  id: {
+    type: DataTypes.INTEGER,
+    primaryKey: true,
+    autoIncrement: true,
+    comment: '主键',
+  },
+  mac_addr: {
+    type: DataTypes.STRING(17),
+    allowNull: false,
+    comment: '设备 MAC 地址，如 AA:BB:CC:DD:EE:FF',
+  },
+  share_code: {
+    type: DataTypes.CHAR(5),
+    allowNull: false,
+    comment: '分享码（5位字符）',
+  },
+  action: {
+    type: DataTypes.ENUM('export', 'import'),
+    allowNull: false,
+    comment: '操作类型：export=导出分享码，import=导入分享码',
+  },
+  ip_addr: {
+    type: DataTypes.STRING(45),
+    allowNull: false,
+    defaultValue: '',
+    comment: '用户 IP 地址（支持 IPv4/IPv6）',
+  },
+  eq_data: {
+    type: DataTypes.JSON,
+    allowNull: false,
+    comment: 'EQ 数据快照（JSON）',
+  },
+  expire_at: {
+    type: DataTypes.DATE,
+    allowNull: true,
+    comment: '分享码到期时间（导出时快照，导入可为空）',
+  },
+  create_at: {
+    type: DataTypes.DATE,
+    allowNull: false,
+    defaultValue: DataTypes.NOW,
+    comment: '操作时间',
+  },
+}, {
+  tableName: 'share_code_log',
+  comment: '分享码流水表',
+  indexes: [
+    { name: 'idx_mac_addr', fields: ['mac_addr'] },
+    { name: 'idx_share_code', fields: ['share_code'] },
+    { name: 'idx_create_at', fields: ['create_at'] },
+  ],
+});
+
+module.exports = ShareCodeLog;
+

backend/src/models/index.js

@@ -1,5 +1,6 @@
 const Brand = require('./Brand');
 const Model = require('./Model');
 const Ota = require('./Ota');
+const ShareCodeLog = require('./ShareCodeLog');
 
-module.exports = { Brand, Model, Ota };
+module.exports = { Brand, Model, Ota, ShareCodeLog };