added bound checking to van invintory

python/van_inventory/templates/partials/item_rows.html

@@ -8,7 +8,7 @@
             <td>{{ item.name }}</td>
             <td>
                 <form hx-patch="/items/{{ item.id }}" hx-target="#item-list" hx-swap="innerHTML" style="display:inline; margin:0;">
-                    <input type="number" name="quantity" value="{{ item.quantity }}" step="any" style="width:5rem">
+                    <input type="number" name="quantity" value="{{ item.quantity }}" step="any" min="0" style="width:5rem">
                     <button type="submit" style="padding:0.2rem 0.5rem; font-size:0.8rem;">Update</button>
                 </form>
             </td>