main主干首次提交，包含用户认证模块

src/main/resources/mapper/SysCompanyMapper.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.labelsys.backend.mapper.SysCompanyMapper">
+    <resultMap id="SysCompanyResultMap" type="com.labelsys.backend.entity.SysCompany">
+        <id column="id" property="id"/>
+        <result column="company_code" property="companyCode"/>
+        <result column="company_name" property="companyName"/>
+        <result column="status" property="status"/>
+        <result column="created_at" property="createdAt"/>
+        <result column="updated_at" property="updatedAt"/>
+    </resultMap>
+
+    <sql id="CompanyColumns">
+        id, company_code, company_name, status, created_at, updated_at
+    </sql>
+
+    <insert id="insert" parameterType="com.labelsys.backend.entity.SysCompany">
+        insert into sys_company (id, company_code, company_name, status, created_at, updated_at)
+        values (#{id}, #{companyCode}, #{companyName}, #{status}, current_timestamp, current_timestamp)
+    </insert>
+
+    <select id="findById" resultMap="SysCompanyResultMap">
+        select <include refid="CompanyColumns"/>
+        from sys_company
+        where id = #{id}
+    </select>
+
+    <select id="findByCompanyCode" resultMap="SysCompanyResultMap">
+        select <include refid="CompanyColumns"/>
+        from sys_company
+        where company_code = #{companyCode}
+    </select>
+
+    <select id="findEnabledCompaniesByPhone" resultMap="SysCompanyResultMap">
+        select distinct c.id, c.company_code, c.company_name, c.status, c.created_at, c.updated_at
+        from sys_company c
+        inner join sys_user u on u.company_id = c.id
+        where u.phone = #{phone}
+          and u.status = 'ENABLED'
+          and c.status = 'ENABLED'
+        order by c.id
+    </select>
+
+    <select id="listAll" resultMap="SysCompanyResultMap">
+        select <include refid="CompanyColumns"/>
+        from sys_company
+        order by id
+    </select>
+
+    <update id="updateStatus">
+        update sys_company
+        set status = #{status}, updated_at = current_timestamp
+        where id = #{id}
+    </update>
+
+    <delete id="deleteAll">
+        delete from sys_company
+    </delete>
+</mapper>