refactor(organization): 将所属组织搜索组件统一替换为级联选择器

- 全站搜索栏所属组织由树形下拉 (el-tree-select) 统一替换为级联选择器 (el-cascader)
- 修改多个视图和组件中所属组织相关表单与搜索逻辑，适配级联选择器数据结构
- 组织数据结构调整及新增 findOrgPath、findDeptPath 等方法支持路径反查与回显
- 表单模型与搜索参数中所属组织字段改用 ID 路径数组，提交时转换为名称
- 优化所属组织搜索UI，统一清除、过滤、提示等功能样式和行为
- 引入 organization-search mixin 支持组织数据加载、路径转换及搜索参数格式化
- 更新相关依赖组件 Element Plus 引入 ElCascader 替换 ElTreeSelect
- 修正搜索表单CSS，新增el-cascader全宽样式支持搜索栏布局一致性
- 兼容老数据，支持多种部门ID格式自动转换到单选路径数组格式
- 业务部门与承办部门表单同样应用级联选择器及路径转换逻辑
- 相关搜索配置项所属组织字段类型由 input 改为 cascader，提升搜索交互体验

src/views/business/project-apply.vue

@@ -166,33 +166,25 @@
             />
           </el-form-item>
           <el-form-item label="业务部门" prop="businessDeptId">
-            <el-tree-select
-              v-model="form.businessDeptId"
-              :data="businessDeptTreeOptions"
-              :props="deptTreeSelectProps"
-              node-key="value"
+            <el-cascader
+              v-model="businessDeptCascaderValue"
+              :options="businessDeptTreeOptions"
+              :props="deptCascaderProps"
               placeholder="请选择业务部门"
-              check-strictly
               filterable
               clearable
-              :render-after-expand="false"
               :disabled="isBasicInfoReadonly"
-              @change="handleBusinessDeptChange"
             />
           </el-form-item>
           <el-form-item label="承办部门" prop="undertakeDeptId">
-            <el-tree-select
-              v-model="form.undertakeDeptId"
-              :data="deptTreeOptions"
-              :props="deptTreeSelectProps"
-              node-key="value"
+            <el-cascader
+              v-model="undertakeDeptCascaderValue"
+              :options="deptTreeOptions"
+              :props="deptCascaderProps"
               placeholder="请选择承办部门"
-              check-strictly
               clearable
               filterable
-              :render-after-expand="false"
               :disabled="isBasicInfoReadonly"
-              @change="handleUndertakeDeptChange"
             />
           </el-form-item>
           <el-form-item label="项目由来" prop="projectSource">
@@ -1047,11 +1039,6 @@ export default {
       deptOptions: [],
       businessDeptTreeOptions: [],
       deptTreeOptions: [],
-      deptTreeSelectProps: {
-        label: 'label',
-        value: 'value',
-        children: 'children',
-      },
       cargoTypeOptions: [],
       selectedCustomerId: [],
       selectedCarrierIds: [],
@@ -1110,6 +1097,45 @@ export default {
   },
   computed: {
     ...mapGetters(['permission', 'userInfo']),
+    // 部门级联配置：checkStrictly 允许选中任意层级，不必选到末级
+    deptCascaderProps() {
+      return {
+        label: 'label',
+        value: 'value',
+        children: 'children',
+        emitPath: true,
+        checkStrictly: true,
+        expandTrigger: 'click',
+      };
+    },
+    // 业务部门：form 存部门 id，级联控件用根到节点的 id 路径，两者在此双向转换
+    businessDeptCascaderValue: {
+      get() {
+        const id = this.form.businessDeptId;
+        return id ? this.findDeptPath(id, this.businessDeptTreeOptions) || [id] : [];
+      },
+      set(path) {
+        const value = Array.isArray(path)
+          ? path.filter(item => item !== undefined && item !== null && item !== '')
+          : [];
+        this.form.businessDeptId = value.length ? value.at(-1) : '';
+        this.handleBusinessDeptChange(this.form.businessDeptId);
+      },
+    },
+    // 承办部门：同上
+    undertakeDeptCascaderValue: {
+      get() {
+        const id = this.form.undertakeDeptId;
+        return id ? this.findDeptPath(id, this.deptTreeOptions) || [id] : [];
+      },
+      set(path) {
+        const value = Array.isArray(path)
+          ? path.filter(item => item !== undefined && item !== null && item !== '')
+          : [];
+        this.form.undertakeDeptId = value.length ? value.at(-1) : '';
+        this.handleUndertakeDeptChange(this.form.undertakeDeptId);
+      },
+    },
     permissionList() {
       return {
         addBtn: this.canCreate,
@@ -1843,15 +1869,30 @@ export default {
       return `${base}-BG${this.$dayjs().format('YYYYMMDD')}`;
     },
     handleBusinessDeptChange(value) {
-      const dept = this.deptOptions.find(item => item.value === value);
+      // 兼容级联路径数组（取末级）与单个部门 id
+      const id = Array.isArray(value) ? value.at(-1) : value;
+      const dept = this.deptOptions.find(item => String(item.value) === String(id));
       this.form.businessDeptName = dept ? dept.rawLabel : '';
       this.$refs.projectForm?.validateField('businessDeptId');
     },
     handleUndertakeDeptChange(value) {
-      const dept = this.deptOptions.find(item => item.value === value);
+      const id = Array.isArray(value) ? value.at(-1) : value;
+      const dept = this.deptOptions.find(item => String(item.value) === String(id));
       this.form.undertakeDeptName = dept ? dept.rawLabel : '';
       this.$refs.projectForm?.validateField('undertakeDeptId');
     },
+    // 由部门 id 反查「根 → 该节点」的 id 路径，供级联回显（找不到返回 null）
+    findDeptPath(id, tree = [], parents = []) {
+      const target = Array.isArray(id) ? id.at(-1) : id;
+      if (target === undefined || target === null || target === '') return null;
+      for (const node of tree || []) {
+        const path = [...parents, node.value];
+        if (String(node.value) === String(target)) return path;
+        const matched = this.findDeptPath(target, node.children, path);
+        if (matched) return matched;
+      }
+      return null;
+    },
     handleProjectTypeChange() {
       this.normalizeAttachmentFileTypes();
       this.$refs.projectForm?.validateField('projectType');