feat(module): implement --ui-radius CSS variable (#2341)

Co-authored-by: Benjamin Canac <canacb1@gmail.com>

docs/app/components/theme-picker/ThemePicker.vue

@@ -0,0 +1,140 @@
+<template>
+  <UPopover :ui="{ content: 'w-72 px-6 py-4 flex flex-col gap-4' }">
+    <template #default="{ open }">
+      <UButton
+        icon="i-heroicons-swatch"
+        color="neutral"
+        :variant="open ? 'soft' : 'ghost'"
+        square
+        aria-label="Color picker"
+        :ui="{ leadingIcon: 'text-[--ui-primary]' }"
+      />
+    </template>
+
+    <template #content>
+      <fieldset>
+        <legend class="text-[11px] leading-none font-semibold mb-2">
+          Primary
+        </legend>
+
+        <div class="grid grid-cols-3 gap-1 -mx-2">
+          <ThemePickerButton
+            v-for="color in primaryColors"
+            :key="color"
+            :label="color"
+            :chip="color"
+            :selected="primary === color"
+            @select="primary = color"
+          />
+        </div>
+      </fieldset>
+
+      <fieldset>
+        <legend class="text-[11px] leading-none font-semibold mb-2">
+          Neutral
+        </legend>
+
+        <div class="grid grid-cols-3 gap-1 -mx-2">
+          <ThemePickerButton
+            v-for="color in neutralColors"
+            :key="color"
+            :label="color"
+            :chip="color"
+            :selected="neutral === color"
+            @select="neutral = color"
+          />
+        </div>
+      </fieldset>
+
+      <fieldset>
+        <legend class="text-[11px] leading-none font-semibold mb-2">
+          Radius
+        </legend>
+
+        <div class="grid grid-cols-5 gap-1 -mx-2">
+          <ThemePickerButton
+            v-for="r in radiuses"
+            :key="r"
+            :label="String(r)"
+            class="justify-center px-0"
+            :selected="radius === r"
+            @select="radius = r"
+          />
+        </div>
+      </fieldset>
+
+      <fieldset>
+        <legend class="text-[11px] leading-none font-semibold mb-2">
+          Theme
+        </legend>
+
+        <div class="flex gap-1 -mx-2">
+          <ThemePickerButton
+            v-for="m in modes"
+            :key="m.label"
+            v-bind="m"
+            :selected="mode === m.label"
+            @select="mode = m.label"
+          />
+        </div>
+      </fieldset>
+    </template>
+  </UPopover>
+</template>
+
+<script setup lang="ts">
+import colors from 'tailwindcss/colors'
+import { omit } from '#ui/utils'
+
+const appConfig = useAppConfig()
+const colorMode = useColorMode()
+
+// Computed
+
+const neutralColors = ['slate', 'gray', 'zinc', 'neutral', 'stone']
+const neutral = computed({
+  get() {
+    return appConfig.ui.colors.neutral
+  },
+  set(option) {
+    appConfig.ui.colors.neutral = option
+    window.localStorage.setItem('nuxt-ui-neutral', appConfig.ui.colors.neutral)
+  }
+})
+
+const colorsToOmit = ['inherit', 'current', 'transparent', 'black', 'white', ...neutralColors]
+const primaryColors = Object.keys(omit(colors, colorsToOmit as any))
+const primary = computed({
+  get() {
+    return appConfig.ui.colors.primary
+  },
+  set(option) {
+    appConfig.ui.colors.primary = option
+    window.localStorage.setItem('nuxt-ui-primary', appConfig.ui.colors.primary)
+  }
+})
+
+const radiuses = [0, 0.125, 0.25, 0.375, 0.5]
+const radius = computed({
+  get() {
+    return appConfig.theme.radius
+  },
+  set(option) {
+    appConfig.theme.radius = option
+    window.localStorage.setItem('nuxt-ui-radius', String(appConfig.theme.radius))
+  }
+})
+
+const modes = [
+  { label: 'light', icon: appConfig.ui.icons.light },
+  { label: 'dark', icon: appConfig.ui.icons.dark }
+]
+const mode = computed({
+  get() {
+    return colorMode.value
+  },
+  set(option) {
+    colorMode.preference = option
+  }
+})
+</script>

docs/app/components/theme-picker/ThemePickerButton.vue

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+<template>
+  <UButton
+    size="sm"
+    color="neutral"
+    :icon="icon"
+    :label="label"
+    :variant="selected ? 'soft' : 'outline'"
+    class="capitalize ring-[--ui-border] rounded-[--ui-radius] text-[11px]"
+    @click.stop.prevent="$emit('select')"
+  >
+    <template v-if="chip" #leading>
+      <span
+        class="inline-block w-2 h-2 rounded-full"
+        :class="`bg-[--color-light] dark:bg-[--color-dark]`"
+        :style="{
+          '--color-light': `var(--color-${chip}-500)`,
+          '--color-dark': `var(--color-${chip}-400)`
+        }"
+      />
+    </template>
+  </UButton>
+</template>
+
+<script setup lang="ts">
+defineProps<{
+  label: string
+  icon?: string
+  chip?: string
+  selected?: boolean
+}>()
+defineEmits(['select'])
+</script>