[FEATURE]:Total token usage in Zen dashboard

[KeqiZeng]

Feature hasn't been suggested before.

• [x] I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

Hi, I'm new to opencode and very enjoy it.

It would be appreciated if there will be a more detailed usage statistics in the Zen dashboard, like the total tokens usage (and by model) in OpenRouter. Some people (like me) would like to see how many tokens I can use in a month:) Thanks!

Example in OpenRouter:

[github-actions[bot]]

This issue might be a duplicate of existing issues. Please check:

• #6100: Token count and % no longer reported outside of the sidebar

Feel free to ignore if none of these address your specific case.