fix(sales-invoice): inject Tax Articles column into saved grid layouts

Per-user grid layouts (GridView in __UserSettings) saved before this feature
list the legacy tax_article column but not custom_tax_articles_display. Frappe
renders the saved list verbatim and ignores the new in_list_view field, so the
'Tax Articles' cell never appears for those users until added via the grid gear
-- which is why it showed on a fresh user (Administrator) but not on machines
where the user had a saved layout.

Patch replaces the legacy tax_article entry with custom_tax_articles_display in
every saved Sales Invoice Item layout that lacks it. Idempotent; runs on migrate
so every machine converges automatically.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

jey_erp/patches.txt

@@ -13,4 +13,5 @@ jey_erp.patches.remove_won_lost_breaks
 jey_erp.patches.remove_won_lost_checkboxes
 jey_erp.patches.drop_bank_integration_account_mapping
 jey_erp.patches.backfill_si_tax_article_row_keys
-jey_erp.patches.backfill_sales_invoice_tax_articles_history
+jey_erp.patches.backfill_sales_invoice_tax_articles_history
+jey_erp.patches.add_tax_articles_to_si_grid_views

jey_erp/patches/add_tax_articles_to_si_grid_views.py

@@ -0,0 +1,54 @@
+import json
+
+import frappe
+
+
+def execute():
+	"""Inject the new "Tax Articles" column into saved Sales Invoice Item grid layouts.
+
+	Per-user grid column layouts live in `__UserSettings` (GridView). A layout saved
+	before the multi tax-article feature lists the legacy `tax_article` column but not
+	the new `custom_tax_articles_display`. Frappe renders that saved list verbatim and
+	ignores the new in_list_view field, so the "Tax Articles" cell never appears for
+	those users until they add it manually via the grid gear.
+
+	Replace the legacy `tax_article` entry (or, lacking it, insert after
+	`item_tax_template`) with `custom_tax_articles_display` in every saved layout that
+	doesn't already have it. Idempotent.
+	"""
+	rows = frappe.db.sql(
+		"select user, data from `__UserSettings` where doctype = 'Sales Invoice'",
+		as_dict=True,
+	)
+	for r in rows:
+		try:
+			data = json.loads(r.data or "{}")
+		except (ValueError, TypeError):
+			continue
+
+		grid_view = data.get("GridView") or {}
+		cols = grid_view.get("Sales Invoice Item")
+		if not cols:
+			continue
+
+		names = [c.get("fieldname") for c in cols]
+		if "custom_tax_articles_display" in names:
+			continue
+
+		new_col = {"fieldname": "custom_tax_articles_display", "columns": 2}
+		if "tax_article" in names:
+			cols[names.index("tax_article")] = new_col
+		elif "item_tax_template" in names:
+			cols.insert(names.index("item_tax_template") + 1, new_col)
+		else:
+			cols.append(new_col)
+
+		grid_view["Sales Invoice Item"] = cols
+		data["GridView"] = grid_view
+		frappe.db.sql(
+			"update `__UserSettings` set data = %s where user = %s and doctype = 'Sales Invoice'",
+			(json.dumps(data), r.user),
+		)
+
+	frappe.db.commit()
+	frappe.cache().delete_value("_user_settings")