Implement authentication phase with Cidaas OAuth2 integration

- Add authentication middleware to protect routes
- Create API endpoints for login, logout, registration, and user info
- Develop UI components for login and registration forms
- Integrate VeeValidate for form validation
- Update environment configuration for Cidaas settings
- Add i18n support for English and German languages
- Enhance Tailwind CSS for improved styling of auth components
- Document authentication flow and testing procedures

app/components/ui/form/FormLabel.vue

@@ -0,0 +1,42 @@
+<script setup lang="ts">
+import type { HTMLAttributes } from 'vue'
+import type { LabelProps } from 'reka-ui'
+import { inject } from 'vue'
+import { Label } from 'reka-ui'
+import { useFieldError } from 'vee-validate'
+import { cn } from '~/lib/utils'
+import type { FormItemContext } from '.'
+import { FORM_ITEM_INJECT_KEY } from '.'
+
+/**
+ * FormLabel component - Label for form fields with error state styling
+ * Automatically associates with the form control via htmlFor
+ */
+
+interface Props extends LabelProps {
+  class?: HTMLAttributes['class']
+}
+
+const props = defineProps<Props>()
+
+// Get the form item context for ID
+const formItemContext = inject<FormItemContext>(FORM_ITEM_INJECT_KEY)
+
+// Get the field error state from the nearest parent field
+const error = useFieldError()
+</script>
+
+<template>
+  <Label
+    :for="formItemContext?.id"
+    :class="
+      cn(
+        'text-sm font-medium leading-none peer-disabled:cursor-not-allowed peer-disabled:opacity-70',
+        error && 'text-destructive',
+        props.class
+      )
+    "
+  >
+    <slot />
+  </Label>
+</template>