Frontend bundle ~1MB gz in one eager chunk — code-split heavy widgets

[mikedegeofroy]

Severity: High · Area: onno-ui-starter / frontend build · Found in framework audit 2026-07-07

Single ~3.5 MB (1.03 MB gz) index chunk — recharts, maplibre-gl, fullcalendar×4, dnd, DivKit all eagerly loaded. The only code-split is per-lucide-icon (icon-bridge.tsx:52), producing ~1500 tiny chunk files.

Fix: React.lazy the heavy widgets (chart/map/calendar/kanban) — they are already island-gated, so they are natural split points. Target <400 KB gz initial chunk.