[WIP] Align sharing, exportOptions and pagination formats

[Copilot]

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original prompt

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This section details on the original issue you should resolve

<issue_title>[P2] Sharing/ExportOptions/Pagination 协议对齐</issue_title>
<issue_description>## 背景
Parent Issue: #736

三个属性存在 Spec 与 ObjectUI 的 schema 格式不兼容问题：

1. sharing：Spec { type: personal/collaborative, lockedBy } vs ObjectUI { visibility, enabled }
2. exportOptions：Spec string[] vs ObjectUI { formats, maxRecords, includeHeaders, fileNamePrefix }
3. pagination.pageSizeOptions：类型已定义，需 UI 选择器

目标

• 三个属性均通过适配层兼容两种格式
• pageSizeOptions 渲染 page size 下拉选择器

改动范围

• packages/types/src/objectql.ts — sharing 类型 union
• packages/plugin-list/src/ListView.tsx — exportOptions normalize + pageSizeOptions UI
• packages/react/src/spec-bridge/bridges/list-view.ts — sharing adapter

验收标准

• Spec sharing format 可被正确解析
• Spec exportOptions: ['csv', 'xlsx'] 格式可正常工作
• pageSizeOptions 渲染下拉选择器
• 选择 page size 后数据重新按新 size 加载
• 所有新增代码有对应单元测试
• pnpm test 全部通过
  </issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes [P2] Sharing/ExportOptions/Pagination 协议对齐 #750

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Project	Deployment	Actions	Updated (UTC)
objectui	Ready	Preview, Comment	Feb 23, 2026 0:41am
objectui-demo	Ready	Preview, Comment	Feb 23, 2026 0:41am
objectui-storybook	Error		Feb 23, 2026 0:41am