Teknium 00a0c56598 feat: add persistent CLI status bar and usage details (#1522) ...

Salvaged from PR #1104 by kshitijk4poor. Closes #683.

Adds a persistent status bar to the CLI showing model name, context
window usage with visual bar, estimated cost, and session duration.
Responsive layout degrades gracefully for narrow terminals.

Changes:
- agent/usage_pricing.py: shared pricing table, cost estimation with
  Decimal arithmetic, duration/token formatting helpers
- agent/insights.py: refactored to reuse usage_pricing (eliminates
  duplicate pricing table and formatting logic)
- cli.py: status bar with FormattedTextControl fragments, color-coded
  context thresholds (green/yellow/orange/red), enhanced /usage with
  cost breakdown, 1Hz idle refresh for status bar updates
- tests/test_cli_status_bar.py: status bar snapshot, width collapsing,
  usage report with/without pricing, zero-priced model handling
- tests/test_insights.py: verify zero-priced providers show as unknown

Salvage fixes:
- Resolved conflict with voice status bar (both coexist in layout)
- Import _format_context_length from hermes_cli.banner (moved since PR)

Co-authored-by: kshitijk4poor <kshitijk4poor@users.noreply.github.com>

2026-03-16 04:42:48 -07:00

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