feat(admin): merge quantity into price/currency row, add BRL, PT-BR labels

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

components/item-form.tsx

@@ -155,11 +155,11 @@ export default function ItemForm({ initialData, onSubmit, onCancel, isEditing =
         />
       </div>
 
-      {/* Price & Quantity */}
+      {/* Price, Currency & Quantity */}
       <div className="grid grid-cols-3 gap-4">
-        <div className="col-span-2">
+        <div>
           <label className="block text-sm font-medium text-gray-700 mb-1">
-            Price
+            Preço
           </label>
           <input
             type="number"
@@ -178,7 +178,7 @@ export default function ItemForm({ initialData, onSubmit, onCancel, isEditing =
         </div>
         <div>
           <label className="block text-sm font-medium text-gray-700 mb-1">
-            Currency
+            Moeda
           </label>
           <select
             className="w-full px-3 py-2 border-2 border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-indigo-500 focus:border-indigo-500 text-gray-900"
@@ -187,17 +187,15 @@ export default function ItemForm({ initialData, onSubmit, onCancel, isEditing =
               setFormData((prev) => ({ ...prev, currency: e.target.value }))
             }
           >
+            <option value="BRL">BRL</option>
             <option value="USD">USD</option>
             <option value="EUR">EUR</option>
             <option value="GBP">GBP</option>
-            <option value="CAD">CAD</option>
           </select>
         </div>
-      </div>
-
         <div>
           <label className="block text-sm font-medium text-gray-700 mb-1">
-          Quantity
+            Quantidade
           </label>
           <input
             type="number"
@@ -209,6 +207,7 @@ export default function ItemForm({ initialData, onSubmit, onCancel, isEditing =
             }
           />
         </div>
+      </div>
 
       {/* Image Upload/URL */}
       <ImageUpload