Bundle shrinkage: довести initial JS до 200KB target

## Что это Текущий initial-load bundle — 354KB JS (gzipped). Target — 200KB. Дельта 154KB надо найти. Vision: - Lazy DesignPanel — расширить на all secondary panels - Lazy adapters viewer registry с manualChunks + dynamic import() - Code-split routes через TanStack Router - Treeshake unused deps: bundle-analyzer report → identify top-5 «жирных» imports - Replace heavy libs: date-fns → small alt, lodash → es-toolkit, etc. - Async splash-screen для slow networks - Preconnect hints для critical fetches - Lighthouse CI gate: blocks merge при bundle > target +5% margin - Bundle budget gate: per-package thresholds ## Зачем Bundle size = first-paint time. На slow connections / underpowered laptops каждый KB important. 200KB-budget — это норма для современных productivity-apps (Linear, Notion, Figma desktop). 354KB — это too long-tail для first-time user experience. Target: LCP ≤ 2.5s, INP ≤ 200ms на P75 user. ## Источники вдохновения - [openclaw/clownfish](https://github.com/openclaw/clownfish) - [mimecuvalo/all-the-things](https://github.com/mimecuvalo/all-the-things) - [linear/linear-release](https://github.com/linear/linear-release) ## 🔗 Linear - [PZD-362](https://linear.app/kuhjie/issue/PZD-362) — backing ticket