関連ワード:  visual studio code copilot chat    visual studio code copilot chat not showing    visual studio code copilot chat extension    visual studio code copilot chat history    visual studio code copilot chat window    visual studio code copilot chat not working    visual studio code copilot chat shortcut    visual studio code copilot chat disappeared    visual studio code copilot chatgpt    visual studio code copilot chat open