Align dark mode surfaces with a cooler, deeper aesthetic inspired by
Claude's dark theme:
- Background: #1f1f1e (was rgb(19,22.5,30.5))
- Sidebar: #171716 (separate from main background)
- Cards/Dropdowns: #242422 (was #181c25)
- Borders: #2f2f2d / #383835 (was blue-tinted grays)
- Text: neutralized grays (#c8c8c6, #6e6e6c etc.)
- Box-shadows: pure black rgba (was blue-tinted)
Also updates the self-contained error-debug page fallback tokens.
Both explicit [data-theme=dark] and prefers-color-scheme blocks are
kept in sync. High-contrast dark overrides remain untouched.
Custom-built error handler for the web channel that shows a tabbed debug
dashboard (exception, request context, environment, SQL queries) in dev mode
and a clean branded error page with copyable request ID in prod mode.
All errors are logged as JSON lines to storage/logs/errors/ for lookup by
request ID. Uses the project's design tokens for visual consistency.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
