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-ui/src/views/bid/material/detail.vue

@@ -75,7 +75,16 @@
         <div class="grid-item">
           <span class="grid-label">所属分类</span>
           <div class="grid-value-wrap">
-            <el-input v-if="isEditing" v-model="form.categoryName" size="small" disabled />
+            <el-cascader
+              v-if="isEditing"
+              v-model="form.categoryId"
+              :options="categoryTreeData"
+              :props="{ label: 'categoryName', value: 'categoryId', children: 'children', checkStrictly: true, emitPath: false }"
+              placeholder="请选择分类"
+              clearable
+              filterable
+              size="small"
+              style="width:100%" />
             <span v-else class="grid-value" :class="{ empty: !material.categoryName }">{{ material.categoryName || '' }}</span>
           </div>
         </div>
@@ -142,6 +151,7 @@
 
 <script>
 import { getMaterial, updateMaterial } from "@/api/bid/material";
+import { getCategoryList } from "@/api/bid/category";
 import SupplierQuoteTab from "./components/SupplierQuoteTab";
 import ClientQuoteTab from "./components/ClientQuoteTab";
 import CompareSection from "./components/CompareSection";
@@ -156,14 +166,21 @@ export default {
       form: {},
       perfParams: [],
       activeTab: "supplier",
-      isEditing: false
+      isEditing: false,
+      categoryTreeData: []
     };
   },
   created() {
     this.materialId = this.$route.query && this.$route.query.id;
     this.loadMaterial();
+    this.loadCategories();
   },
   methods: {
+    loadCategories() {
+      getCategoryList().then(res => {
+        this.categoryTreeData = res.data || [];
+      });
+    },
     loadMaterial() {
       if (!this.materialId) return;
       getMaterial(this.materialId).then(res => {
@@ -201,14 +218,31 @@ export default {
         this.$message.success("保存成功");
         this.isEditing = false;
         
-        // 更新本地数据
-        this.material = { ...this.material, ...saveData };
+        // 更新本地数据，同步分类名称显示
+        const categoryName = this.findCategoryName(this.form.categoryId);
+        this.material = { ...this.material, ...saveData, categoryName };
         this.material.perfArray = this.perfParams;
       } catch (error) {
         this.$message.error("保存失败：" + error.message);
       }
     },
 
+    // 根据categoryId从分类树中查找分类名称
+    findCategoryName(categoryId) {
+      if (!categoryId) return '';
+      const search = (nodes) => {
+        for (const n of nodes) {
+          if (n.categoryId === categoryId) return n.categoryName;
+          if (n.children && n.children.length) {
+            const found = search(n.children);
+            if (found) return found;
+          }
+        }
+        return '';
+      };
+      return search(this.categoryTreeData);
+    },
+
     // 取消编辑
     handleCancel() {
       this.isEditing = false;