feat(ui-library): migrate tailwind config to CSS-first

Replace per-app tailwind.config.js with @source/@theme directives in
styles/globals.css, importing the shared config/tailwind.config.css.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/ui-library/styles/globals.css

@@ -1,11 +1,43 @@
-@import 'tailwindcss';
-
-@import './../../../packages/ui/build/css/source/global.css';
-@import './../../../packages/ui/build/css/themes/dark.css';
+@import 'config/tailwind.config.css';
 @import './../../../packages/ui/build/css/themes/classic-dark.css';
-@import './../../../packages/ui/build/css/themes/light.css';
 
-@config '../tailwind.config.js';
+@source '../app/**/*.{js,ts,jsx,tsx}';
+@source '../components/**/*.{js,ts,jsx,tsx}';
+@source '../registry/**/*.{js,ts,jsx,tsx}';
+@source '../content/**/*.mdx';
+@source './../../../packages/ui/src/**/*.{tsx,ts,js}';
+@source './../../../packages/ui-patterns/src/**/*.{tsx,ts,js}';
+
+@theme {
+  --max-w-site: 128rem;
+  --radius-lg: var(--radius);
+  --radius-md: calc(var(--radius) - 2px);
+  --radius-sm: calc(var(--radius) - 4px);
+  --color-background: hsl(var(--background));
+  --color-foreground: hsl(var(--foreground));
+  --color-card: hsl(var(--card));
+  --color-card-foreground: hsl(var(--card-foreground));
+  --color-popover: hsl(var(--popover));
+  --color-popover-foreground: hsl(var(--popover-foreground));
+  --color-primary: hsl(var(--primary));
+  --color-primary-foreground: hsl(var(--primary-foreground));
+  --color-secondary: hsl(var(--secondary));
+  --color-secondary-foreground: hsl(var(--secondary-foreground));
+  --color-muted: hsl(var(--muted));
+  --color-muted-foreground: hsl(var(--muted-foreground));
+  --color-accent: hsl(var(--accent));
+  --color-accent-foreground: hsl(var(--accent-foreground));
+  --color-destructive: hsl(var(--destructive));
+  --color-destructive-foreground: hsl(var(--destructive-foreground));
+  --color-border: hsl(var(--border));
+  --color-input: hsl(var(--input));
+  --color-ring: hsl(var(--ring));
+  --color-chart-1: hsl(var(--chart-1));
+  --color-chart-2: hsl(var(--chart-2));
+  --color-chart-3: hsl(var(--chart-3));
+  --color-chart-4: hsl(var(--chart-4));
+  --color-chart-5: hsl(var(--chart-5));
+}
 
 @layer base {
   :root {

apps/ui-library/tailwind.config.js

@@ -1,69 +0,0 @@
-const config = require('config/tailwind.config')
-
-module.exports = config({
-  darkMode: ['class'],
-  content: [
-    './app/**/*.{js,ts,jsx,tsx}',
-    './components/**/*.{js,ts,jsx,tsx}',
-    './registry/**/*.{js,ts,jsx,tsx}',
-    './content/**/*.mdx',
-    './../../packages/ui/src/**/*.{tsx,ts,js}',
-    './../../packages/ui-patterns/src/**/*.{tsx,ts,js}',
-  ],
-  theme: {
-    extend: {
-      maxWidth: {
-        site: '128rem',
-      },
-      // The following variables are needed for the shadcn components in the examples to work. They're not clashing
-      // with the variables in the ui package.
-      borderRadius: {
-        lg: 'var(--radius)',
-        md: 'calc(var(--radius) - 2px)',
-        sm: 'calc(var(--radius) - 4px)',
-      },
-      colors: {
-        background: 'hsl(var(--background))',
-        foreground: 'hsl(var(--foreground))',
-        card: {
-          DEFAULT: 'hsl(var(--card))',
-          foreground: 'hsl(var(--card-foreground))',
-        },
-        popover: {
-          DEFAULT: 'hsl(var(--popover))',
-          foreground: 'hsl(var(--popover-foreground))',
-        },
-        primary: {
-          DEFAULT: 'hsl(var(--primary))',
-          foreground: 'hsl(var(--primary-foreground))',
-        },
-        secondary: {
-          DEFAULT: 'hsl(var(--secondary))',
-          foreground: 'hsl(var(--secondary-foreground))',
-        },
-        muted: {
-          DEFAULT: 'hsl(var(--muted))',
-          foreground: 'hsl(var(--muted-foreground))',
-        },
-        accent: {
-          DEFAULT: 'hsl(var(--accent))',
-          foreground: 'hsl(var(--accent-foreground))',
-        },
-        destructive: {
-          DEFAULT: 'hsl(var(--destructive))',
-          foreground: 'hsl(var(--destructive-foreground))',
-        },
-        border: 'hsl(var(--border))',
-        input: 'hsl(var(--input))',
-        ring: 'hsl(var(--ring))',
-        chart: {
-          1: 'hsl(var(--chart-1))',
-          2: 'hsl(var(--chart-2))',
-          3: 'hsl(var(--chart-3))',
-          4: 'hsl(var(--chart-4))',
-          5: 'hsl(var(--chart-5))',
-        },
-      },
-    },
-  },
-})