Use descriptive required-field validation messages in CMS forms.

Replace generic "Required" copy with field-specific messages for product, variant, and digital stock forms.

cms/src/components/variantDetail/VariantDetailDigitalStockSection.vue

@@ -317,7 +317,7 @@ const stockRemoving = ref(false);
 const stockListLoading = ref(false);
 
 const stockContentRules: FormRules = {
-    content: [{ required: true, message: 'Required', trigger: 'blur' }]
+    content: [{ required: true, message: 'Content is required', trigger: 'blur' }]
 };
 
 const stockEditVisible = ref(false);

cms/src/stores/products.ts

@@ -86,14 +86,14 @@ export const useProductsStore = defineStore('products', () => {
 
     const createOrEditCurrentProductVariantFormRules = computed<FormRules>(() => ({
         title: [
-            { required: true, message: 'Required', trigger: 'blur' },
+            { required: true, message: 'Title is required', trigger: 'blur' },
             {
                 max: validationProductTitleMaxLength,
                 message: `At most ${validationProductTitleMaxLength} characters`,
                 trigger: 'blur'
             }
         ],
-        price: [{ required: true, message: 'Required', trigger: 'change' }],
+        price: [{ required: true, message: 'Price is required', trigger: 'change' }],
         ...(currentProductIsManual.value
             ? {
                   stockQuantity: [

cms/src/views/CmsProductDetailView.vue

@@ -169,7 +169,7 @@ const deleteSaving = ref(false);
 
 const productRules: FormRules = {
     title: [
-        { required: true, message: 'Required', trigger: 'blur' },
+        { required: true, message: 'Title is required', trigger: 'blur' },
         {
             max: validationProductTitleMaxLength,
             message: `At most ${validationProductTitleMaxLength} characters`,