Improve PWA routing, performance, and remote sync

[SDSLeon]

Summary

• make /app and deep links reliable through the hosted app rewrite and root-scoped, route-filtered service worker
• reduce disconnected startup work with route-level lazy loading and mobile-specific chunking
• page remote runtime history, preserve authoritative cursors, bound reconnect ticket latency, and add relay stream backpressure
• version and warm offline caches while keeping unrelated landing-site routes outside the worker fetch handler
• add a repeatable remote protocol performance benchmark

Root cause

The public /app alias only covered the entry route, the worker scope/cache lifecycle did not reliably own deep links or loaded chunks, and remote snapshots/reconnects could replay stale cursors or transfer unbounded transcript history. The mobile build also eagerly pulled heavy feature chunks into disconnected startup.

Validation

• pnpm run typecheck
• pnpm run lint
• pnpm run fmt:check
• pnpm run test — 5,746 passed
• pnpm run test:perf:remote — 6,006 frames in 17 ms
• production desktop, mobile, and website builds
• full isolated integration smoke — zero console/runtime errors
• clean-origin /app browser test — online reload 188 ms; offline reload 701 ms; 112/112 cache hits

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
lightcode-landing	Ready	Preview, Comment	Jul 18, 2026 5:06pm