fix: add Stock UOM when adding new item in POS list

[Abdeali099]

Issue: Frappe Support - 27653

Error Log

TypeError: e.stock_uom is undefined
    check_stock_availability point-of-sale line 294 > injectedScript:308
    on_cart_update point-of-sale line 294 > injectedScript:308
    item_selected point-of-sale line 294 > injectedScript:306
    bind_events point-of-sale line 294 > injectedScript:38
    jQuery 8
    bind_events point-of-sale line 294 > injectedScript:38
    inti_component point-of-sale line 294 > injectedScript:1
    <anonymous> point-of-sale line 294 > injectedScript:1
    init_item_selector point-of-sale line 294 > injectedScript:306
    prepare_components point-of-sale line 294 > injectedScript:306
    make_app point-of-sale line 294 > injectedScript:306
    callback point-of-sale line 294 > injectedScript:302
    e request.js:85
    200 request.js:133
    call request.js:305
    jQuery 6
    call request.js:279
    call request.js:109
    prepare_app_defaults point-of-sale line 294 > injectedScript:302
    check_opening_entry point-of-sale line 294 > injectedScript:302
    jQuery 12
    call request.js:279
    call request.js:109
    fetch_opening_entry point-of-sale line 294 > injectedScript:302
    check_opening_entry point-of-sale line 294 > injectedScript:302
    <anonymous> point-of-sale line 294 > injectedScript:302
    on_page_load point_of_sale.js:11
    require assets.js:17
    execute assets.js:114
    promise callback*execute assets.js:108
    require assets.js:15
    require assets.js:14
    on_page_load point_of_sale.js:10
point-of-sale line 294 > injectedScript:308:464

---

Failure Line

erpnext/erpnext/selling/page/point_of_sale/pos_controller.js

Line 698 in 6f99e99

const bold_uom = item_row.stock_uom.bold();

Root cause of Issue

In PR #44320, if enough stock is not available, the error message shows Stock UOM instead of UOM to get accurate stock details.

Arguments for creating a new item row when selecting:

erpnext/erpnext/selling/page/point_of_sale/pos_controller.js

Line 577 in 6f99e99

const { item_code, batch_no, serial_no, rate, uom } = item;

erpnext/erpnext/selling/page/point_of_sale/pos_controller.js

Line 589 in 6f99e99

const new_item = { item_code, batch_no, rate, uom, [field]: value };

These args does not have stock_uom.

Important

Backport to Version-15

[Abdeali099]

@ruthra-kumar can you review this?