Treemap on left (3fr), two punchcards stacked on right (2fr) using new .vizRow grid layout. Replaces full-width stacked arrangement. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Three-level dashboard driven by sidebar selection: - L1 (no selection): all-apps overview with health table, per-app charts - L2 (app selected): route performance table, error velocity, top errors - L3 (route selected): processor table, latency heatmap data, bottleneck KPI Backend: 3 new endpoints (timeseries/by-app, timeseries/by-route, errors/top), per-app SLA settings (app_settings table, V12 migration), exact SLA compliance from executions hypertable, error velocity with acceleration detection. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
