Nathan Esquenazi 2797e5189b feat: context window usage indicator with real agent data ...

The context indicator in the composer footer now shows real data from
the agent's context compressor instead of hardcoded estimates:

- last_prompt_tokens / context_length (e.g. '12.4k / 200k (6%)')
- Bar color: blue <50%, yellow 50-75%, red >75%
- Hover tooltip shows exact numbers + compression threshold
- Cost appended when available

Backend: streaming.py now reads context_length, threshold_tokens, and
last_prompt_tokens from agent.context_compressor after run_conversation()
and includes them in the usage dict sent with the 'done' SSE event.

This matches the CLI's context window display (the bar that shows
current context vs total window).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-04-04 18:50:17 -07:00

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