feat(frontend): add loading state and spinner to button component

Author: Lasim

services/frontend/src/components/ui/button/Button.vue

@@ -1,17 +1,39 @@
 <script setup lang="ts">
 import type { HTMLAttributes } from 'vue'
+import { computed } from 'vue'
 import { Primitive, type PrimitiveProps } from 'reka-ui'
+import { Loader2 } from 'lucide-vue-next'
 import { cn } from '@/lib/utils'
 import { type ButtonVariants, buttonVariants } from '.'
 
 interface Props extends PrimitiveProps {
   variant?: ButtonVariants['variant']
   size?: ButtonVariants['size']
   class?: HTMLAttributes['class']
+  loading?: boolean
+  loadingText?: string
+  disabled?: boolean
 }
 
 const props = withDefaults(defineProps<Props>(), {
   as: 'button',
+  loading: false,
+  disabled: false,
+})
+
+// Compute the actual disabled state (disabled when loading or explicitly disabled)
+const isDisabled = computed(() => props.loading || props.disabled)
+
+// Compute icon size based on button size
+const spinnerSize = computed(() => {
+  switch (props.size) {
+    case 'sm':
+      return 'h-3 w-3'
+    case 'lg':
+      return 'h-5 w-5'
+    default:
+      return 'h-4 w-4'
+  }
 })
 </script>
 
@@ -21,7 +43,15 @@ const props = withDefaults(defineProps<Props>(), {
     :as="as"
     :as-child="asChild"
     :class="cn(buttonVariants({ variant, size }), props.class)"
+    :disabled="isDisabled"
   >
-    <slot />
+    <Loader2
+      v-if="loading"
+      :class="cn(spinnerSize, 'animate-spin')"
+    />
+    <template v-if="loading && loadingText">
+      {{ loadingText }}
+    </template>
+    <slot v-else-if="!loading" />
   </Primitive>
 </template>