Enhance checkout flow with new components and validation

- Added AddressForm and CheckoutForm components for user input during checkout.
- Implemented validation using Zod and VeeValidate for billing address fields.
- Created OrderSummary and MockPayPalButton components for order confirmation and payment simulation.
- Updated CartSheet and CartSidebar to navigate to the new checkout page at '/kasse'.
- Introduced new API endpoints for validating checkout data and creating orders.
- Enhanced user experience with responsive design and error handling.

These changes complete the checkout functionality, allowing users to enter billing information, simulate payment, and confirm orders.

app/components/ui/select/Select.vue

@@ -0,0 +1,22 @@
+<script setup lang="ts">
+import { SelectRoot } from 'reka-ui'
+
+const props = defineProps<{
+  modelValue?: string
+  disabled?: boolean
+}>()
+
+const emit = defineEmits<{
+  'update:modelValue': [value: string]
+}>()
+</script>
+
+<template>
+  <SelectRoot
+    :model-value="modelValue"
+    :disabled="disabled"
+    @update:model-value="emit('update:modelValue', $event)"
+  >
+    <slot />
+  </SelectRoot>
+</template>

app/components/ui/select/SelectContent.vue

@@ -0,0 +1,43 @@
+<script setup lang="ts">
+import { type HTMLAttributes, computed } from 'vue'
+import { SelectContent as SelectContentPrimitive, SelectPortal, SelectViewport } from 'reka-ui'
+import { cn } from '@/lib/utils'
+
+interface SelectContentProps {
+  position?: 'popper' | 'item-aligned'
+  class?: HTMLAttributes['class']
+}
+
+const props = withDefaults(defineProps<SelectContentProps>(), {
+  position: 'popper',
+})
+
+const delegatedProps = computed(() => {
+  const { class: _, ...delegated } = props
+  return delegated
+})
+</script>
+
+<template>
+  <SelectPortal>
+    <SelectContentPrimitive
+      v-bind="delegatedProps"
+      :class="
+        cn(
+          'relative z-50 min-w-[8rem] overflow-hidden rounded-md border bg-popover text-popover-foreground shadow-md data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0 data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2',
+          props.position === 'popper' &&
+            'data-[side=bottom]:translate-y-1 data-[side=left]:-translate-x-1 data-[side=right]:translate-x-1 data-[side=top]:-translate-y-1',
+          props.class
+        )
+      "
+    >
+      <SelectViewport
+        :class="
+          cn('p-1', props.position === 'popper' && 'h-[var(--reka-select-trigger-height)] w-full min-w-[var(--reka-select-trigger-width)]')
+        "
+      >
+        <slot />
+      </SelectViewport>
+    </SelectContentPrimitive>
+  </SelectPortal>
+</template>

app/components/ui/select/SelectItem.vue

@@ -0,0 +1,41 @@
+<script setup lang="ts">
+import { type HTMLAttributes, computed } from 'vue'
+import { SelectItem as SelectItemPrimitive, SelectItemIndicator, SelectItemText } from 'reka-ui'
+import { Check } from 'lucide-vue-next'
+import { cn } from '@/lib/utils'
+
+interface SelectItemProps {
+  value: string
+  disabled?: boolean
+  class?: HTMLAttributes['class']
+}
+
+const props = defineProps<SelectItemProps>()
+
+const delegatedProps = computed(() => {
+  const { class: _, ...delegated } = props
+  return delegated
+})
+</script>
+
+<template>
+  <SelectItemPrimitive
+    v-bind="delegatedProps"
+    :class="
+      cn(
+        'relative flex w-full cursor-default select-none items-center rounded-sm py-1.5 pl-8 pr-2 text-sm outline-none focus:bg-accent focus:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50',
+        props.class
+      )
+    "
+  >
+    <span class="absolute left-2 flex h-3.5 w-3.5 items-center justify-center">
+      <SelectItemIndicator>
+        <Check class="h-4 w-4" />
+      </SelectItemIndicator>
+    </span>
+
+    <SelectItemText>
+      <slot />
+    </SelectItemText>
+  </SelectItemPrimitive>
+</template>

app/components/ui/select/SelectTrigger.vue

@@ -0,0 +1,33 @@
+<script setup lang="ts">
+import { type HTMLAttributes, computed } from 'vue'
+import { SelectTrigger as SelectTriggerPrimitive } from 'reka-ui'
+import { ChevronDown } from 'lucide-vue-next'
+import { cn } from '@/lib/utils'
+
+interface SelectTriggerProps {
+  disabled?: boolean
+  class?: HTMLAttributes['class']
+}
+
+const props = defineProps<SelectTriggerProps>()
+
+const delegatedProps = computed(() => {
+  const { class: _, ...delegated } = props
+  return delegated
+})
+</script>
+
+<template>
+  <SelectTriggerPrimitive
+    v-bind="delegatedProps"
+    :class="
+      cn(
+        'flex h-10 w-full items-center justify-between rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background placeholder:text-muted-foreground focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50',
+        props.class
+      )
+    "
+  >
+    <slot />
+    <ChevronDown class="h-4 w-4 opacity-50" />
+  </SelectTriggerPrimitive>
+</template>

app/components/ui/select/SelectValue.vue

@@ -0,0 +1,15 @@
+<script setup lang="ts">
+import { SelectValue as SelectValuePrimitive } from 'reka-ui'
+
+interface SelectValueProps {
+  placeholder?: string
+}
+
+defineProps<SelectValueProps>()
+</script>
+
+<template>
+  <SelectValuePrimitive :placeholder="placeholder">
+    <slot />
+  </SelectValuePrimitive>
+</template>

app/components/ui/select/index.ts

@@ -0,0 +1,5 @@
+export { default as Select } from './Select.vue'
+export { default as SelectTrigger } from './SelectTrigger.vue'
+export { default as SelectValue } from './SelectValue.vue'
+export { default as SelectContent } from './SelectContent.vue'
+export { default as SelectItem } from './SelectItem.vue'