Copilot for Xcode Stops After Maximum Tool Attempts

issue 中没有确定文件、测试或入口点。首先定位最大工具尝试次数错误的处理逻辑，并将其与所描述的 VS Code 总结并继续行为进行比较。完成的标准是，Xcode 对话总结其上下文并继续进行，而无需重新启动。

Describe the bug

When using Copilot for Xcode, I often encounter the following error:

"Oops, maximum tool attempts reached. You can update the max tool
requests in settings."

After this happens, Copilot stops responding and does not provide any
further assistance. Unlike Copilot in VS Code, it does not
automatically summarize the context or continue the conversation,
which interrupts development.

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Versions

• Copilot for Xcode: 0.47.0
• Xcode: 26.3
• macOS: 26

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Steps to reproduce

1. Open a project in Xcode.
2. Start using Copilot Chat for code generation or debugging.
3. Continue interacting with Copilot for multiple consecutive requests.
4. After several tool calls, Copilot shows:
   > "Oops, maximum tool attempts reached..."
5. Copilot no longer responds or continues the task.

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Expected behavior

When the maximum tool attempts limit is reached, Copilot should behave
similarly to VS Code Copilot:

• Automatically summarize previous context.
• Continue the conversation with a reduced context.
• Allow the user to proceed without restarting the session.

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Actual behavior

• Copilot stops working.
• No summary is provided.
• No automatic continuation.
• User must manually restart or clear the chat.

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Screenshots

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Logs

Not available / Please advise how to collect relevant logs.

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Additional context

Copilot in VS Code supports "summary and continue" behavior when
context limits are reached, which greatly improves usability.

It would be very helpful if Copilot for Xcode could support a similar
mechanism to avoid frequent interruptions during long debugging or
development sessions.