feat(erp): 采购计划/采购审核/到货跟踪 + 供应商管理

- 采购计划：选合同自动带出明细、合同/供应商表格选择器、批量填充(可生成N行)、卷号/数量列、送审/重新送审流程
- 采购审核：通过/驳回 + 申请意见，每次审核留痕(erp_purchase_plan_audit_log)，计划详情展示审核历史/驳回理由
- 到货跟踪：上传到货Excel按牌号+规格回填明细到货量与状态，列校验/kg→t纠正，满额自动归档
- 供应商管理页(复用既有 erp_supplier 后端)
- 综合搜索(计划号/供货商/合同号)、左右分栏工作台、全局表单按钮对齐修复
- 清理无用旧 erp 页面(看板/需求/订单/收货/退货/汇总)
- DDL 与菜单脚本：docs/purchase-plan-ddl.sql(按 path 解析父目录、可重复执行)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

klp-erp/src/main/resources/mapper/erp/ErpPurchasePlanMapper.xml

@@ -0,0 +1,80 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.klp.erp.mapper.ErpPurchasePlanMapper">
+
+    <select id="selectOrderCodes" resultType="java.lang.String">
+        SELECT order_code FROM crm_order
+        WHERE del_flag = 0 AND order_id IN
+        <foreach collection="ids" item="id" open="(" separator="," close=")">
+            #{id}
+        </foreach>
+    </select>
+
+    <!-- 选合同自动带出明细：crm_order_item -> 采购计划明细VO；公差空值给 '0' -->
+    <select id="selectItemsByOrderIds" resultType="com.klp.erp.domain.vo.ErpPurchasePlanItemVo">
+        SELECT
+            product_type                                         AS productType,
+            material                                             AS material,
+            grade                                                AS grade,
+            width                                                AS width,
+            thickness                                            AS thickness,
+            COALESCE(NULLIF(TRIM(width_tolerance), ''), '0')     AS widthTolerance,
+            COALESCE(NULLIF(TRIM(thickness_tolerance), ''), '0') AS thicknessTolerance,
+            weight                                               AS weight,
+            product_num                                          AS quantity
+        FROM crm_order_item
+        WHERE del_flag = 0 AND order_id IN
+        <foreach collection="ids" item="id" open="(" separator="," close=")">
+            #{id}
+        </foreach>
+        ORDER BY order_id, item_id
+    </select>
+
+    <!-- 合同列表 + 该合同已挂接的采购计划数 -->
+    <select id="selectContractPage" resultType="com.klp.erp.domain.vo.ErpContractOptionVo">
+        SELECT
+            o.order_id      AS orderId,
+            o.order_code    AS orderCode,
+            o.contract_code AS contractCode,
+            o.contract_name AS contractName,
+            o.customer      AS customer,
+            o.supplier      AS supplier,
+            o.order_amount  AS orderAmount,
+            o.salesman      AS salesman,
+            (SELECT COUNT(*) FROM erp_purchase_plan_contract_rel r
+                JOIN erp_purchase_plan p ON p.plan_id = r.plan_id AND p.del_flag = '0'
+             WHERE r.del_flag = '0' AND r.order_id = o.order_id) AS planCount
+        FROM crm_order o
+        WHERE o.del_flag = 0
+        <if test="kw != null and kw != ''">
+            AND (o.order_code LIKE CONCAT('%', #{kw}, '%')
+              OR o.contract_name LIKE CONCAT('%', #{kw}, '%')
+              OR o.contract_code LIKE CONCAT('%', #{kw}, '%')
+              OR o.customer LIKE CONCAT('%', #{kw}, '%'))
+        </if>
+        ORDER BY o.is_top DESC, o.order_id DESC
+    </select>
+
+    <!-- 某合同下的所有采购计划 -->
+    <select id="selectPlansByContract" resultType="com.klp.erp.domain.vo.ErpPurchasePlanVo">
+        SELECT p.*
+        FROM erp_purchase_plan p
+        JOIN erp_purchase_plan_contract_rel r ON r.plan_id = p.plan_id AND r.del_flag = '0'
+        WHERE p.del_flag = '0' AND r.order_id = #{orderId}
+        ORDER BY p.plan_id DESC
+    </select>
+
+    <!-- 按合同关键字查关联的采购计划ID（订单编号/合同号/合同名称） -->
+    <select id="selectPlanIdsByContractKeyword" resultType="java.lang.Long">
+        SELECT DISTINCT r.plan_id
+        FROM erp_purchase_plan_contract_rel r
+        JOIN crm_order o ON o.order_id = r.order_id AND o.del_flag = 0
+        WHERE r.del_flag = '0'
+          AND (o.order_code LIKE CONCAT('%', #{kw}, '%')
+            OR o.contract_code LIKE CONCAT('%', #{kw}, '%')
+            OR o.contract_name LIKE CONCAT('%', #{kw}, '%'))
+    </select>
+
+</mapper>