fix(attachment): 补充上传大小配置的单位与标签

- SPA Schema 的大小限制 repeat 子字段补上 unit: 'M'，避免数字被
误读为数量；PHP Schema 早已带单位，两侧一致
- 标签「可上传」改为「可上传大小」，与单位 M 搭配后语义明确
- 管理端 SPA 已重新构建，421 项契约测试通过

assets/admin/src/schema/sections/permissions/index.js

@@ -24,7 +24,7 @@ const uploadMimeUserTypeOptions = [
 
 const uploadSizeFields = [
   { key: 'type', label: '用户类型', type: 'select', default: 'logged', options: uploadUserTypeOptions },
-  { key: 'val', label: '可上传', type: 'number', default: 30, min: 1, max: 2048 },
+  { key: 'val', label: '可上传大小', type: 'number', default: 30, min: 1, max: 2048, unit: 'M' },
 ]
 
 export const permissionsSchemas = {

src/Admin/Schema/SchemaPermissions.php

@@ -101,7 +101,7 @@ class SchemaPermissions {
                                 ['type' => 'admin', 'val' => 20],
                             ], 'min' => 1, 'button_title' => '添加细分用户权限', 'help' => '投稿、评论等前端场景允许上传的最大图片大小（单位 MB）。同一个用户满足多个条件则取最大值，「最小默认值」为所有人兜底。', 'fields' => [
                                 ['key' => 'type', 'label' => '用户类型', 'type' => 'select', 'default' => 'logged', 'options' => self::upload_user_type_options()],
-                                ['key' => 'val', 'label' => '可上传', 'type' => 'number', 'default' => 5, 'min' => 1, 'max' => 2048, 'unit' => 'M'],
+                                ['key' => 'val', 'label' => '可上传大小', 'type' => 'number', 'default' => 5, 'min' => 1, 'max' => 2048, 'unit' => 'M'],
                             ]],
                             ['key' => 'image_upload_multiple', 'label' => '图片批量上传最大数量', 'type' => 'number', 'default' => 6, 'min' => 0, 'max' => 100, 'unit' => '张', 'help' => '前端投稿、评论上传图片允许的单次批量上传数量（为 0 则不限制，为 1 则不能批量上传）。'],
                             ['key' => 'upload_video_size', 'label' => '前端视频上传限制', 'type' => 'repeater', 'default' => [
@@ -109,14 +109,14 @@ class SchemaPermissions {
                                 ['type' => 'admin', 'val' => 2048],
                             ], 'min' => 1, 'button_title' => '添加细分用户权限', 'help' => '前端允许上传的最大视频大小（单位 MB）。同一个用户满足多个条件则取最大值，必须包含最低默认值。', 'fields' => [
                                 ['key' => 'type', 'label' => '用户类型', 'type' => 'select', 'default' => 'logged', 'options' => self::upload_user_type_options()],
-                                ['key' => 'val', 'label' => '可上传', 'type' => 'number', 'default' => 30, 'min' => 1, 'max' => 2048, 'unit' => 'M'],
+                                ['key' => 'val', 'label' => '可上传大小', 'type' => 'number', 'default' => 30, 'min' => 1, 'max' => 2048, 'unit' => 'M'],
                             ]],
                             ['key' => 'upload_file_size', 'label' => '前端文件上传大小限制', 'type' => 'repeater', 'default' => [
                                 ['type' => 'default', 'val' => 30],
                                 ['type' => 'admin', 'val' => 2048],
                             ], 'min' => 1, 'button_title' => '添加细分用户权限', 'help' => '前端允许上传的其他文件（不含视频和图片，建议大于视频图片）最大大小（单位 MB）。同一个用户满足多个条件则取最大值，必须包含最低默认值。', 'fields' => [
                                 ['key' => 'type', 'label' => '用户类型', 'type' => 'select', 'default' => 'logged', 'options' => self::upload_user_type_options()],
-                                ['key' => 'val', 'label' => '可上传', 'type' => 'number', 'default' => 30, 'min' => 1, 'max' => 2048, 'unit' => 'M'],
+                                ['key' => 'val', 'label' => '可上传大小', 'type' => 'number', 'default' => 30, 'min' => 1, 'max' => 2048, 'unit' => 'M'],
                             ]],
                         ]],
                         ['key' => 'mime-limits', 'title' => '上传格式限制', 'fields' => [