- Create FeatureRoute.tsx wrapper component for route-level feature gating
- Add FEATURE_KEYS constant map to demoMode.ts for type-safe feature references
- Wrap 47 feature-specific routes with <FeatureRoute> in App.tsx
- Core routes (dashboard, billing, pricing, auth callbacks) remain ungated
- Disabled features redirect to /dashboard and never load their lazy chunks
- Main bundle: +259 bytes (FeatureRoute is a lightweight component)
Closes Phase 1 Plan 01-02