Regression: exit summary not shown after upgrading to 1.0.74 / 1.0.75

Summary

After upgrading from 1.0.73 to 1.0.74 (and still broken in 1.0.75), the CLI no longer prints the session/exit summary when quitting. Rolling back to 1.0.73 restores the expected behavior.

Environment

• Copilot CLI: broken on 1.0.74 and 1.0.75; works on 1.0.73 (current rollback)
• OS: Ubuntu 22.04.5 LTS on WSL2 (kernel 6.18.33.1-microsoft-standard-WSL2)
• Terminal: xterm-256color
• Shell: /bin/bash
• TERM=xterm-256color

Steps to reproduce

1. Run copilot (interactive mode).
2. Have a normal conversation.
3. Exit via /exit (also tried ctrl+d).
4. Observe: no summary is printed on exit.

Expected behavior

On exit, the CLI prints a session summary (as it does in 1.0.73).

Notes

• /exit print still force-prints the session content, but the normal automatic summary on exit is missing.
• Verified on both 1.0.74 and 1.0.75 before rolling back to 1.0.73.
• No relevant setting in settings.json appears to gate this (showTimestamps, footer settings, etc. were checked).

Regression range

First bad: 1.0.74 — Last good: 1.0.73

Tái hiện hồi quy bằng cách chạy copilot CLI tương tác và thoát bằng /exit hoặc ctrl+d, sau đó so sánh hành vi giữa 1.0.73 và 1.0.74. Theo dõi đường dẫn thoát thông thường thay vì lệnh in /exit; hoàn tất khi bản tóm tắt phiên tự động được trả về lúc thoát mà không làm hỏng hành vi in cưỡng bức hiện có.