* 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
Upgraded most packages to current as of 2025-05-09 for almost everything.
Remove the erroneous extra dependency to old xterm package since the correct @xterm/xterm package was already included (suspect a bad merge) and it was causing issues with react 19.1.
Switched to using the hooks exposed in the usehooks-ts package (this package was already referenced, suspect a bad merge) removing our private copies of useInterval, useIsMounted, useResizeObserver which are identical.
Added import of JSX from react now needed because NPX is not in global scope in react 19.x.
Explicitly cast the ref of included elements due to change in react 19.x
