feat: remove price and currency fields from frontend and backend

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

components/admin/ItemForm.tsx

@@ -18,8 +18,6 @@ export default function ItemForm({ item, onSubmit, onCancel, mode, error }: Item
     item || {
       name: '',
       description: '',
-      price: null,
-      currency: 'USD',
       quantity: 1,
       imageUrl: '',
       purchaseUrls: [],
@@ -67,23 +65,6 @@ export default function ItemForm({ item, onSubmit, onCancel, mode, error }: Item
             }
           />
         </div>
-        <div>
-          <label className="block text-base font-medium text-gray-700 dark:text-gray-300 mb-1">
-            Price
-          </label>
-          <input
-            type="number"
-            step="0.01"
-            className="w-full px-2 py-1.5 text-base border border-gray-300 dark:border-gray-600 rounded focus:outline-none focus:ring-2 focus:ring-indigo-500 dark:bg-gray-700 dark:text-white"
-            value={formData.price || ''}
-            onChange={(e) =>
-              setFormData((prev) => ({
-                ...prev,
-                price: e.target.value ? parseFloat(e.target.value) : null,
-              }))
-            }
-          />
-        </div>
         <div className="md:col-span-2">
           <label className="block text-base font-medium text-gray-700 dark:text-gray-300 mb-1">
             Description