[建议 / Feature] delete or edit or own messages; change models but keep the same chat

提交前确认 · Pre-submission checklist

• 我已搜索过现有 issue，确认这不是重复提议 / I searched existing issues and confirmed this isn't a duplicate.
• 我已阅读 CONTRIBUTING.md / I've read CONTRIBUTING.md.

问题类别 · Category

对话 / Agent 交互 · Agent chat / interaction

涉及的 Agent 框架 · Agent framework

多个 / 通用 · Multiple / General

使用场景 · Use case

It's annoying not being able to delete or edit messages, because if you made a mistake you only have the option to clarify it in another message afterwards, so the messages increase and the memory decreases. It's also a basic necessity that any ai chat would need. On another topic, i dont get why when choosing another model because others are down leads you to a new chat. It seems like you're stuck on only one model on each chat

建议方案 · Proposal

Add delete and edit functions for your own messages, as well as staying on the current chat after changing model. There should be a more evident way of changing models on web version.

预期价值 · Expected value

Less messages to clarify mistakes, persistent work even when other models are down so you can keep working on something residing in a chat

你认为的优先级 · Your perceived priority

中 · Medium

你使用的 ZCode 版本 / 环境 · ZCode version / environment

Web

补充材料 · Additional context

No response

This feedback issue identifies no source files, tests, or entry points. Start by locating the web chat message controls and model-selection flow; done should include editing and deleting the user's own messages, retaining the current chat when changing models, and making model switching more evident.