Context Usage in status bar shows global/last-updated value instead of the active chat

What version of the VS Code extension are you using?

Version 0.5.17

Which IDE are you using?

Visual Studio Code – Insiders 1.105.0-insider

What platform is your computer?

Microsoft Windows NT 10.0.26120.0 x64

What steps can reproduce the bug?

1. Create several Codex chats: A, B, C, D, E (each has its own task)
2. Stay focused on chat A (or even the home page)
3. Trigger work in other chats (B/C run background actions)
4. Watch the Context Usage meter in the bottom-right status bar

What is the expected behavior?

Actual behavior

• The meter updates with whoever chat reports last
• While viewing A, the number fluctuates as B/C/D/E progress, so you can't read A real context at that moment

Expected behavior

• When a chat is focused, the status-bar meter should only reflect that chat’s usage

Artifacts:
Video:
https://github.com/user-attachments/assets/58f68521-0372-42fc-9fbf-273dd5edc914

What do you see instead?

On the home page, either:

• a) show nothing
• b) show a scoped value ("selected chat")
• c) show a compact hint for the chat with the highest fill ratio (Max: 75% — "Hello, describe…") or (Max elsewhere: 92%). Clicking the status item opens that chat

Additional information

_No response_