feat(admin): 广告位管理页——上传/链接/绑定相册/开关/排序

Task 11（广告位轮播）：admin 后台广告位治理页。

- utils/ads/adsLogic：scopeKind/normalizeAlbumIds/isValidAdLinkUrl 纯逻辑
  （与服务端 dto LINK_URL_PATTERN、albumIds 归一语义同源）+ vitest 6 例
- api/ads + types/api/ads.d.ts：list/create/update/delete/initUpload 五端点
  （对照 embedSlots.ts 逐字风格；列表全量不分页、imageUrl 现签）
- views/system/ads：列表（缩略图/备注名/链接截断/投放范围标签/启停开关
  失败重拉回滚/上移下移 sortOrder 互换/硬删确认）+ 新建编辑对话框
  （staging 直传 init→裸 fetch PUT、Content-Type 与申明一致；相册多选
  远程搜索复用 /v1/albums 分页+本地过滤，绑定 ID 超限/失效以裸 ID 兜底；
  编辑换图才带 image 三字段；albumIds 归一空→null 转全局）
- 路由/菜单：system 组 ads 页（ri:advertisement-line，workspace 分组）；
  locales zh/en 补 menus.system.ads + adsManage 子树（键集一致入单测）

Co-Authored-By: Claude Code <noreply@anthropic.com>

apps/admin/src/locales/langs/zh.json

@@ -235,7 +235,8 @@
       "users": "账号管理",
       "userSync": "用户同步",
       "usage": "用量统计",
-      "embedSlots": "展示位管理"
+      "embedSlots": "展示位管理",
+      "ads": "广告位管理"
     },
     "albums": {
       "title": "相册管理",
@@ -922,6 +923,67 @@
       "enabledOff": "已停用（configVersion 已递增至 {version}，公开端随即 404）"
     }
   },
+  "adsManage": {
+    "list": {
+      "title": "广告位管理",
+      "subtitle": "管理相册页广告轮播：图片、跳转链接、投放范围与排序。",
+      "tableTitle": "广告位列表",
+      "create": "新建广告位",
+      "empty": "暂无广告位，点击「新建广告位」创建",
+      "loadFailed": "广告位列表加载失败",
+      "retry": "重试",
+      "colImage": "图片",
+      "colTitle": "备注名",
+      "colLink": "跳转链接",
+      "colScope": "投放范围",
+      "colEnabled": "启用",
+      "colActions": "操作",
+      "scopeGlobal": "全局",
+      "scopeTargeted": "定向 {n} 相册",
+      "imageAlt": "广告图",
+      "actionUp": "上移",
+      "actionDown": "下移",
+      "actionEdit": "编辑",
+      "actionDelete": "删除",
+      "deleteConfirm": "确定删除广告位「{name}」？删除后不可恢复（数据不保留）。",
+      "deleted": "广告位已删除"
+    },
+    "toast": {
+      "enabledOn": "广告位已启用",
+      "enabledOff": "广告位已停用（观众页随即不可见）"
+    },
+    "form": {
+      "imageLabel": "广告图",
+      "imagePick": "选择图片",
+      "imageRepick": "重选图片",
+      "imageHint": "建议 1200×360、不超过 2MB，支持 jpeg/png/heic",
+      "imageRequired": "请先上传广告图",
+      "imageInvalidType": "仅支持 jpeg/png/heic 图片",
+      "imageTooLarge": "图片超过 2MB 上限",
+      "imageUploadFailed": "图片上传失败：{message}",
+      "imageStagedTag": "新图待保存",
+      "linkLabel": "跳转链接",
+      "linkPlaceholder": "https://example.com/promo",
+      "linkRequired": "请输入跳转链接",
+      "linkInvalid": "链接须以 http(s):// 开头且不超过 2048 字符",
+      "titleLabel": "备注名",
+      "titlePlaceholder": "如：秋季活动推广（仅后台可见，可空）",
+      "albumsLabel": "绑定相册",
+      "albumsPlaceholder": "输入相册标题或 ID 搜索",
+      "albumsSearching": "搜索中…",
+      "albumsNoMatch": "无匹配相册",
+      "albumsHint": "留空=全局投放（全部相册观众页轮播）",
+      "submit": "保存"
+    },
+    "create": {
+      "title": "新建广告位",
+      "created": "广告位已创建"
+    },
+    "edit": {
+      "title": "编辑广告位",
+      "saved": "广告位已保存"
+    }
+  },
   "apiMsg": {
     "AUTH_INVALID_CREDENTIALS": "账号或密码错误",
     "AUTH_RATE_LIMITED": "登录失败次数过多，请稍后再试",