fix(context): keep context state and send behavior in sync

[disrupted]

I noticed a few discrepancies between context internal state, UI (context bar/completion menu) and what gets actually sent.

• current_file could leak into follow-up prompts even when disabled (stale state now gets cleared)
• context bar/completion state could lag behind real state because some context mutations did not emit state.context_updated_at
• typo in context bar subscription (opencode_focused vs is_opencode_focused)

tbh I did not know about the current_file delta behavior and why the context bar sometimes shows it dimmed 😄 I've updated the readme with a short description about this feature

[sudo-tee]

@disrupted

These are great fixes :)

Thanks for this.

[sudo-tee]

@disrupted is this still in draft or ready to review/merge?

[disrupted]

@disrupted is this still in draft or ready to review/merge?

I wanna test it a bit more. Haven't had the chance to make sure it's stable. I'll keep it a draft for now and let you know when it's ready

[disrupted]

@sudo-tee should be ready. I didn't notice any issues

[sudo-tee]

Looks all good to me. Thanks