add HTTP tracing, timeline UI, and OTEL export support
- capture per-phase timings via new nettrace collector/report APIs and HTTP client trace hooks
- persist traces to history, expose them to scripts, and render a budget-aware timeline pane
- wire telemetry config/env flags and wrap request execution with OpenTelemetry spans
- SSE/WebSocket handling, including byte-limit reasons, effective URLs, summary defaults
- clamp negative trace budgets, reset scroll state for help overlays, and document trace usage
What's Changed
- feat: add HTTP tracing, timeline UI and OTEL export support by @unkn0wn-root in #68
Full Changelog: v0.5.2...v0.6.0