Implements the bottom detail panel with processor header bar, tab bar
(Info, Headers, Input, Output, Error, Config, Timeline), and all tab
content components. Info shows processor/exchange metadata in a grid,
Headers fetches per-processor snapshots for side-by-side display,
Input/Output render formatted code blocks, Error extracts exception
types, Config is a placeholder, and Timeline renders a Gantt chart.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
