saas-js/saas-ui — reverse-engineered prompt

Build me a polished React component library for SaaS startups and B2B dashboard apps. It should be based on Chakra UI, written in TypeScript, and feel like something teams can use to build admin panels, customer portals, and internal tools quickly.

I want the core package to include accessible, themeable components like authentication screens, form helpers, date pickers, a stepper, timeline, data table, and common layout pieces for app dashboards. Please include a nice documentation site with examples, usage snippets, and a way to preview components in Storybook.

Set it up so developers can install the package, run the docs locally, build the packages, and contribute without confusion. Keep the design clean and modern, with sensible defaults but easy customization for colors and themes.

Look up current Chakra UI and React docs online if you need to.