Refactor FlatSelectInput Component to Simplify Template Structure

- Removed the conditional rendering of the selected options slot in `FlatSelectInput.vue`, streamlining the template for better readability and maintainability. This change focuses on enhancing the component's clarity by eliminating unnecessary complexity in the markup.

These modifications aim to improve the overall structure of the FlatSelectInput component, making it easier to understand and work with in future development.

client/components/open/forms/fields/components/HiddenRequiredDisabled.vue

@@ -62,21 +62,21 @@ const options = ref([
   { 
     name: 'required', 
     label: 'Required', 
-    icon: 'ph:asterisk-bold',
-    selectedIcon: 'ph:asterisk-bold',
+    icon: 'i-ph-asterisk-bold',
+    selectedIcon: 'i-ph-asterisk-bold',
     iconClass: (isActive) => isActive ? 'text-red-500' : '',
   },
   { 
     name: 'hidden', 
     label: 'Hidden', 
-    icon: 'heroicons:eye',
-    selectedIcon: 'heroicons:eye-slash-solid',
+    icon: 'i-heroicons-eye',
+    selectedIcon: 'i-heroicons-eye-slash-solid',
   },
   { 
     name: 'disabled', 
     label: 'Disabled', 
-    icon: 'heroicons:lock-open',
-    selectedIcon: 'heroicons:lock-closed-solid',
+    icon: 'i-heroicons-lock-open',
+    selectedIcon: 'i-heroicons-lock-closed-solid',
   }
 ])