feat(bid): 完成物料分类体系全功能开发

1. 新增物料分类删除校验，支持校验子分类和关联物料
2. 优化物料列表查询，支持按分类及其后代分类筛选
3. 重构物料详情和编辑页面，使用级联选择器选择分类
4. 新增分类管理页面，支持增删改查分类树形结构
5. 新增物料分类初始化SQL脚本，导入标准分类体系

ruoyi-system/src/main/resources/mapper/bid/BizMaterialCategoryMapper.xml

@@ -16,6 +16,20 @@
     FROM biz_material_category WHERE category_id = #{categoryId}
   </select>
 
+  <select id="countChildren" resultType="int">
+    SELECT COUNT(*) FROM biz_material_category WHERE parent_id = #{parentId}
+  </select>
+
+  <select id="countMaterials" resultType="int">
+    SELECT COUNT(*) FROM biz_material WHERE category_id = #{categoryId}
+  </select>
+
+  <select id="selectDescendantIds" resultType="java.lang.Long">
+    SELECT category_id FROM biz_material_category
+    WHERE ancestors LIKE CONCAT(#{ancestors}, ',%')
+       OR ancestors = #{ancestors}
+  </select>
+
   <insert id="insertCategory" useGeneratedKeys="true" keyProperty="categoryId">
     INSERT INTO biz_material_category (tenant_id,category_name,parent_id,ancestors,sort,status,create_by,create_time)
     VALUES (1,#{categoryName},#{parentId},#{ancestors},#{sort},#{status},#{createBy},NOW())

ruoyi-system/src/main/resources/mapper/bid/BizMaterialMapper.xml

@@ -29,7 +29,16 @@
     LEFT JOIN biz_material_category c ON m.category_id = c.category_id
     <where>
       <if test="tenantId != null"> AND m.tenant_id = #{tenantId}</if>
-      <if test="categoryId != null"> AND m.category_id = #{categoryId}</if>
+      <if test="categoryId != null"> AND (
+        m.category_id = #{categoryId}
+        OR m.category_id IN (
+          SELECT category_id FROM biz_material_category
+          WHERE ancestors LIKE CONCAT(
+            (SELECT ancestors FROM biz_material_category WHERE category_id = #{categoryId}),
+            ',%'
+          )
+        )
+      )</if>
       <if test="materialCode != null and materialCode != ''"> AND m.material_code LIKE CONCAT('%',#{materialCode},'%')</if>
       <if test="materialName != null and materialName != ''"> AND m.material_name LIKE CONCAT('%',#{materialName},'%')</if>
       <if test="brand != null and brand != ''"> AND m.brand LIKE CONCAT('%',#{brand},'%')</if>