* refactor: Migrate from tailwind.js config to Tailwind CSS configuration and improve component styling
- Removed extensive theme and animation configurations from tailwind.config.js, migrating them to index.css for better organization.
- Updated components to utilize CSS variables for grid layouts and animations, enhancing maintainability.
- Adjusted various components to reflect the new CSS structure, ensuring consistent styling across the application.
- Improved accessibility and responsiveness in several UI components, including headers and popovers.
- Fixed minor styling issues and optimized class usage for better performance.
* style: use default tailwindcss/forms options
* refactor(Header): remove unused LuUser icon import
* chore: Upgrade UI vite and tailwind packages
Vite 5.2.0 -> 6.3.5
@vitejs/plugin-basic-ssl 1.2.0 -> 2.0.0
cva: 1.0.0-beta.1 -> 1.0.0-beta.3
focus-trap-react 10.2.3 -> 11.0.3
framer-motion 11.15.0 -> 12.11.0
@tailwindcss/postcss 4.1.6
@tailwindcss/vite 4.1.6
tailwind 3.4.17 -> 4.1.6
tailwind-merge 2.5.5 -> 3.3.0
Minor updates:
@headlessui/react 2.2.2 -> 2.2.3
@types/react 19.1.3 -> 19.1.4
@types/react-dom 19.1.3 -> 19.1.5
@typescript-eslint/eslint-plugin 8.32.0 -> 8.32.1
@typescript-eslint/parser 8.32.0 -> 8.32.1
react-simple-keyboard 3.8.71 -> 3.8.72
The new version of vite required an Node 22.15 (since that's current LTS and node 21.x is EOL)
The changes to css due to the tailwind 3 to 4 upgrade were done following [the upgrade guide](https://tailwindcss.com/docs/upgrade-guide#changes-from-v3)
Done in this order (important):
`shadow-sm` -> `shadow-xs`
`shadow` -> `shadown-sm`
`rounded` -> `rounded-sm`
`outline-none` -> `outline-hidden`
`32rem_32rem_at_center` -> `center_at_32rem_32rem` (revised order of gradient props)
`ring-1 ring-black ring-opacity-5` -> `ring-1 ring-black/50`
`flex-shrink-0` -> `shrink-0`
`flex-grow-0` -> `grow-0`
`outline outline-1` -> `outline-1`
ALSO removed the **extra** `opacity-0` on the video element (trips up latest tailwind causing the video to be invisible)
FocusTrap is now not exported as the default, so change those imports
headlessui's Menu completely changed, so upgrade to the new syntax which necessitated a reorganization of the Header.tsx to enable the "menu" to still work
* Update eslint config and fix errors