feat(module): 子模块自定义ID/路径改为选填，适配按钮权限型子模块

- 校验规则改为 computed：仅根模块强制 path/customId，子模块两者皆可空
- 占位文案按 openingIsChild 切换，提示「作按钮权限时可留空」
- 提交前 path 做 trim，空值传 undefined（后端归一并放开 nullable）

src/views/app/ModuleManage.vue

@@ -27,14 +27,14 @@
                     <Input placeholder="请输入模块名称" v-model="form.name" />
                 </FormItem>
                 <FormItem label="模块路径：" prop="path">
-                    <Input placeholder="请输入模块路径" v-model="form.path" />
+                    <Input :placeholder="openingIsChild ? '选填；作按钮权限时可留空' : '请输入模块路径'" v-model="form.path" />
                 </FormItem>
                 <FormItem label="模块图标：" prop="icon">
                     <Input placeholder="选填，YschIcons 图标名（如 notice-list）；留空则不下发图标"
                         v-model="form.icon" clearable />
                 </FormItem>
                 <FormItem label="自定义ID：" prop="customId">
-                    <InputNumber :style="{ width: '100%' }" placeholder="请输入自定义ID" v-model="form.customId" />
+                    <InputNumber :style="{ width: '100%' }" :placeholder="openingIsChild ? '选填；作按钮权限时可留空' : '请输入自定义ID'" v-model="form.customId" />
                 </FormItem>
                 <FormItem label="排序号：" prop="sortNo">
                     <InputNumber :style="{ width: '100%' }" placeholder="请输入排序号" v-model="form.sortNo" />
@@ -153,13 +153,16 @@ const form = ref<{
     sortNo: null,
 });
 
-const ruleValidate = ref({
+const openingIsChild = ref(false);
+
+/* 子模块双定位：树节点（带路径/编码）或纯按钮权限（两者皆可空）→ 仅根模块必填 */
+const ruleValidate = computed(() => ({
     name: [{ required: true, message: "请输入模块名称", trigger: "blur" }],
+    ...(openingIsChild.value ? {} : {
         path: [{ required: true, message: "请输入模块路径", trigger: "blur" }],
         customId: [{ required: true, type: "number", message: "请输入自定义ID", trigger: "change" }],
-});
-
-const openingIsChild = ref(false);
+    }),
+}));
 const modalTitle = computed(() => {
     if (currentId.value != null) return '编辑模块';
     return openingIsChild.value ? '新增子模块' : '新增模块';
@@ -258,7 +261,7 @@ async function onRawSave() {
                 data: {
                     appId: appId.value,
                     name: form.value.name,
-                    path: form.value.path,
+                    path: form.value.path?.trim() || undefined,
                     icon: form.value.icon?.trim() || undefined,
                     customId: form.value.customId == null ? '' : String(form.value.customId),
                     parentId: form.value.parentId ?? undefined,
@@ -272,8 +275,8 @@ async function onRawSave() {
                     id: currentId.value,
                     appId: appId.value,
                     name: form.value.name,
-                    path: form.value.path,
-                    // 后端 edit 逐字段整体赋值，字段缺省即置空 → 清空图标能生效
+                    path: form.value.path?.trim() || undefined,
+                    // 后端 edit 逐字段整体赋值，字段缺省即置空 → 清空图标/路径能生效
                     icon: form.value.icon?.trim() || undefined,
                     customId: form.value.customId == null ? '' : String(form.value.customId),
                     parentId: form.value.parentId ?? undefined,