I have two GitHub User accounts added to GitHub Copilot App.

I have two GitHub User accounts added to GitHub Copilot App. Both have a GitHub Copilot license provided by different Enterprises.

I have observed that the Copilot App allows to set the "default" user account.

Questions:
- Is the "default" account the one used to consume Copilot credits?
- Is it possible to specify which account applies to which project, so credits for different projects are sent to the right account/enterprise/billing?

---
| Field | Value |
| --- | --- |
| App version | 1.1.0 |
| OS | macOS 26.5.2 |
| Theme | GitHub |
| Path | /chat |
| Tenure | Week 11 |

未指定源文件或测试；首先在 macOS 上的 GitHub Copilot App 1.1.0 中，在 /chat 路径复现双账户设置，并检查默认账户的行为。完成的标准是记录默认账户是否会消耗 Copilot 积分，以及项目是否可以选择单独的账户、企业或计费目标。

由索引模型根据 Issue 内容生成。