React App Dev (VMark) Overview Apply VMark frontend conventions for React 19 + Zustand v5 + Tailwind v4 + shadcn/ui. Workflow 1) Read relevant files before editing (components, hooks, stores, plugins). 2) Follow the VMark rules in (no store destructuring; use selectors). 3) Keep code files under 300 lines; split when needed. 4) Prefer local feature boundaries; avoid cross-feature imports. 5) Update tests for new behavior and run when asked. References - for common source locations and scans. - Docs map: . ---