chore: upgrade Tailwind CSS to v4.3.3 and migrate to Tailwind v4 syntax conventions

[karticme]

Summary

Runs the official @tailwindcss/upgrade codemod across the monorepo to adopt Tailwind CSS v4 and its updated utility naming conventions. No visual changes are intended — this is a mechanical migration.

What changed

Package version

• Bumped tailwindcss to ^4.3.3 in the root and packages/ui manifests.

CSS syntax (globals.css)

• !important modifier moved to suffix position — !mt-0 → mt-0! (Tailwind v4 convention).
• @utility container { … } block repositioned above @layer components (v4 ordering requirement).

Logical property class renames (335 files)

The codemod replaced deprecated directional aliases with their CSS logical property equivalents across all component files, registry components, and compiled JSON registry outputs:

Before	After	Meaning
start-px	inset-s-px	inline-start offset
end-0	inset-e-0	inline-end offset
end-0.5	inset-e-0.5	inline-end offset

Files affected

• apps/ui/registry/default/ui/ — combobox, alert, autocomplete, calendar, command, dialog, drawer, group, sheet, sidebar, toggle-group
• apps/ui/registry/default/particles/ — various particle components
• apps/ui/public/r/ — compiled JSON registry entries
• apps/origin/registry/default/ — all origin UI and component files (~200+ files)
• apps/examples/calcom/ — example app components
• packages/ui/src/components/ — published package components
• packages/ui/src/styles/globals.css — base stylesheet

Notes

• Biome's useSortedClasses lint rule flagged the reordered class names introduced by the codemod. All sort violations were auto-fixed with biome check --write --unsafe before committing so the pre-commit hook passes cleanly.
• No logic, props, or component APIs were changed.

Testing

• Pre-commit Biome check passes with exit code 0.
• Visual regression should be checked in apps/ui and apps/origin dev servers — all affected classes are logical-property equivalents and should render identically in LTR layouts.

[vercel]

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