feat(cart): add LIFO cart order setting (newest item on top)

POS/src/components/sale/InvoiceCart.vue

@@ -1372,7 +1372,10 @@ const {
 	sortedItems,
 	CART_SORT_OPTIONS, CART_SORT_ICONS,
 	toggleCartSortDropdown, handleCartSortToggle, getCartSortLabel, getCartSortIconState,
-} = useCartSort(() => props.items);
+} = useCartSort(
+	() => props.items,
+	computed(() => settingsStore.cartLifo),
+);
 
 /**
  * ============================================================================

POS/src/components/settings/POSSettings.vue

@@ -358,6 +358,11 @@
 												:label="__('Allow Partial Payment')"
 												:description="__('Enable partial payment for invoices')"
 											/>
+											<CheckboxField
+												v-model="settings.cart_lifo"
+												:label="__('LIFO Cart Order (Newest on Top)')"
+												:description="__('Show the most recently added item at the top of the cart instead of the bottom.')"
+											/>
 											<CheckboxField
 												v-model="settings.silent_print"
 												:label="__('Silent Print')"
@@ -617,6 +622,7 @@ const settings = ref({
 	silent_print: 0,
 	allow_negative_stock: 0,
 	tax_inclusive: 0,
+	cart_lifo: 0,
 })
 
 // Stock Sync Settings (localStorage persisted)

POS/src/composables/useCartSort.js

@@ -49,7 +49,7 @@ const SORT_LABEL_MAP = Object.freeze(
  * @param {() => Array} itemsGetter - Getter (or ref) that returns the raw cart
  *        items array.  Typically `() => props.items`.
  */
-export function useCartSort(itemsGetter) {
+export function useCartSort(itemsGetter, lifoMode = null) {
 	// Normalise getter once — avoid typeof check on every access
 	const getItems = typeof itemsGetter === 'function'
 		? itemsGetter
@@ -100,7 +100,15 @@ export function useCartSort(itemsGetter) {
 		const items = getItems()
 
 		const field = cartSortBy.value
-		if (!field) return items
+		if (!field) {
+			// No explicit sort: honour the LIFO setting (newest added on top)
+			const lifo = lifoMode
+				? typeof lifoMode === 'function'
+					? lifoMode()
+					: lifoMode.value
+				: false
+			return lifo ? [...items].reverse() : items
+		}
 
 		const dir = cartSortOrder.value === 'asc' ? 1 : -1
 

POS/src/stores/posEvents.js

@@ -266,7 +266,8 @@ export const usePOSEventsStore = defineStore('posEvents', () => {
 			'allow_return',
 			'allow_write_off_change',
 			'allow_partial_payment',
-			'silent_print'
+			'silent_print',
+			'cart_lifo'
 		]
 		const salesChanges = salesFields.filter(field => field in changes)
 		if (salesChanges.length > 0) {

POS/src/stores/posSettings.js

@@ -35,6 +35,7 @@ export const usePOSSettingsStore = defineStore("posSettings", () => {
 		display_discount_percentage: 0,
 		display_discount_amount: 0,
 		show_variants_as_items: 0,
+		cart_lifo: 0,
 		// Operations
 		allow_sales_order: 0,
 		allow_select_sales_order: 0,
@@ -149,6 +150,7 @@ export const usePOSSettingsStore = defineStore("posSettings", () => {
 	const showVariantsAsItems = computed(() =>
 		Boolean(settings.value.show_variants_as_items),
 	)
+	const cartLifo = computed(() => Boolean(settings.value.cart_lifo))
 
 	// Computed - Operations
 	const allowSalesOrder = computed(() =>
@@ -320,6 +322,7 @@ export const usePOSSettingsStore = defineStore("posSettings", () => {
 			display_discount_percentage: 0,
 			display_discount_amount: 0,
 			show_variants_as_items: 0,
+			cart_lifo: 0,
 			allow_sales_order: 0,
 			allow_select_sales_order: 0,
 			create_only_sales_order: 0,
@@ -435,6 +438,7 @@ export const usePOSSettingsStore = defineStore("posSettings", () => {
 		displayDiscountPercentage,
 		displayDiscountAmount,
 		showVariantsAsItems,
+		cartLifo,
 
 		// Computed - Operations
 		allowSalesOrder,

pos_next/api/constants.py

@@ -40,6 +40,7 @@
 	"enable_session_lock",
 	"session_lock_timeout",
 	"show_variants_as_items",
+	"cart_lifo",
 ]
 
 # Default POS Settings values
@@ -70,4 +71,5 @@
 	"enable_session_lock": 0,
 	"session_lock_timeout": 5,
 	"show_variants_as_items": 0,
+	"cart_lifo": 0,
 }

pos_next/pos_next/doctype/pos_settings/pos_settings.json

@@ -37,6 +37,7 @@
   "display_discount_percentage",
   "display_discount_amount",
   "show_variants_as_items",
+  "cart_lifo",
   "section_break_operations",
   "allow_sales_order",
   "allow_select_sales_order",
@@ -303,6 +304,13 @@
    "fieldtype": "Check",
    "label": "Show Variants as Items"
   },
+  {
+   "default": "0",
+   "description": "Show most recently added item at the top of the cart",
+   "fieldname": "cart_lifo",
+   "fieldtype": "Check",
+   "label": "LIFO Cart Order (Newest on Top)"
+  },
   {
    "collapsible": 1,
    "fieldname": "section_break_operations",