feat(fe): Apply form field navigation to all input components

- KsNumberField: Enter -> next field
- KsMoneyField: Enter -> next field
- KsMultiSelect: Enter (when closed) -> next field
- Complete Tab-like Enter key behavior across all form inputs
- Enables seamless form navigation with Enter key (matching grid behavior)

frontend/src/shared/ui/components/KsMultiSelect.vue

@@ -1,5 +1,6 @@
 <script setup lang="ts">
 import { computed, ref } from 'vue'
+import { useFormFieldNavigation } from '../composables/useFormFieldNavigation'
 
 export interface SelectOption {
   label: string
@@ -100,9 +101,14 @@ const handleClick = () => {
   }
 }
 
+const { inputRef, moveToNextField } = useFormFieldNavigation()
+
 const handleKeydown = (event: KeyboardEvent) => {
   if (event.key === 'Escape') {
     isOpen.value = false
+  } else if (event.key === 'Enter' && !isOpen.value) {
+    event.preventDefault()
+    moveToNextField()
   }
 }
 </script>
@@ -118,6 +124,7 @@ const handleKeydown = (event: KeyboardEvent) => {
     <!-- Button -->
     <div class="ks-multi-select__container">
       <button
+        ref="inputRef"
         :id="id"
         type="button"
         class="ks-multi-select__button"