为共享对话时选择消息添加前端支持

[Sylphy-0xd3ac]

• 我已确认目前没有类似 issue
• 我已确认我已升级到最新版本
• 我已完整浏览项目 README 和项目文档并未找到解决方案
• 我理解并愿意跟进此 issue，协助测试和提供反馈
• 我将以礼貌和尊重的态度提问，不得使用不文明用语 (包括在此发布评论的所有人同样适用, 不遵守的人将被 block)
• 我理解并认可上述内容，并理解项目维护者精力有限，不遵循规则的 issue 可能会被无视或直接关闭

功能描述

后端在 manager/conversation/shared.go 中支持通过 refs 参数支持共享对话的特定部分。ShareConversation 函数将选定的消息引用（refs）存储到数据库中，而 GetSharedMessages 函数支持根据这些引用检索特定的消息。然而，目前前端缺乏在共享时选择特定消息的功能。

相关截图 (如果有)

无。

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Title: Add front-end support for selecting messages during shared conversations

• I have confirmed that there is currently no similar issue
• I have confirmed that I have upgraded to the latest version
• I have fully browsed the project README and project documentation and found no solution
• I understand and am willing to follow up on this issue, assist in testing and provide feedback
• I will ask questions with politeness and respect and must not use uncivilized terms (the same applies to all those who post comments here, and those who do not comply will be blocked)
• I understand and acknowledge the above and understand that project maintainers have limited energy and that issues that do not follow the rules may be ignored or closed directly**

Function Description

The backend supports specific parts of shared conversations through the refs parameter in manager/conversation/shared.go. The ShareConversation function stores selected message references (refs) into the database, while the GetSharedMessages function supports retrieval of specific messages based on these references. However, the front-end currently lacks the ability to select specific messages when sharing, but it already supports displaying shared messages selected through refs.

Related screenshots (if any)

none.