[BUG] History file gets completely deleted with a new chat

[derDere]

Describe the bug
If you create a new Copilot Chat in VSCode the old history file gets cleared and filled with the new content of the new chat. The old chat is lost. Even if I use the history feature of Copilot to reopen this chat, the history files stays on the status up the new chat. I think it's very important to create one chat-file per chat.

To Reproduce
Steps to reproduce the behavior:

1. Start a Copilot Chat in VSCode
2. Start a new Copilot Chat in VSCode

Expected behavior
I expected a new Chat would create a new History file instead of overwriting the history of the other chat.

Your System (please complete the following information):

• SpecStory for Cursor
• SpecStory for GitHub Copilot (VSCode)
• IDE Version: 1.101.0-insider (system setup)
• SpecStory Extension Version: 0.12.0
• OS: Windows 10