fix(bt-import): swap show_progress for freeze to avoid stuck backdrop

Importing Bank Transactions via "Import From → Load from Excel" left
the screen darkened and unresponsive after the job finished. Root cause
was the show_progress Bootstrap modal: closing it from JS (we had a
hand-rolled _closeProgress that called .modal('hide').remove() and then
removed .modal-backdrop manually) interrupted Bootstrap's hide animation
mid-flight, leaving the dimmed overlay stuck. Opening a msgprint right
after made it worse — the two modals fought over the same backdrop
node.

Switched to frappe.dom.freeze / unfreeze: a single full-page overlay
managed by Frappe core, with no Bootstrap modal/backdrop juggling. The
freeze message is updated in place as progress events arrive (writes
to #freeze .freeze-message directly to avoid stacking the freeze
counter, which would break unfreeze pairing). unfreeze on completion
cleans up reliably, so the msgprint that opens immediately after lands
on a clean page.

Removed the now-unused _closeProgress helper.

jey_erp/public/js/bank_transaction_list.js

@@ -221,18 +221,22 @@ const BIExcelImport = {
 
 	_runImport(selected, values, listview) {
 		const total = selected.length;
-		frappe.show_progress(__('Importing'), 0, total, __('Starting import...'));
+		// Freeze the page instead of using show_progress. show_progress relies
+		// on a Bootstrap modal whose backdrop reliably gets stuck when we then
+		// open a msgprint on completion; freeze is a simple full-page overlay
+		// that unfreeze() always cleans up.
+		frappe.dom.freeze(__('Starting import…'));
 
 		frappe.realtime.off('bi_bt_import_progress');
 		frappe.realtime.on('bi_bt_import_progress', function (d) {
-			frappe.show_progress(__('Importing'), d.current, d.total, __('{0} of {1}', [d.current, d.total]));
+			BIExcelImport._setFreezeMessage(__('Importing {0} of {1}…', [d.current, d.total]));
 		});
 
 		frappe.realtime.off('bi_bt_import_complete');
 		frappe.realtime.on('bi_bt_import_complete', function (d) {
 			frappe.realtime.off('bi_bt_import_progress');
 			frappe.realtime.off('bi_bt_import_complete');
-			BIExcelImport._closeProgress();
+			frappe.dom.unfreeze();
 
 			const ok = d.imported || 0;
 			const errCount = (d.errors || []).length;
@@ -273,7 +277,7 @@ const BIExcelImport = {
 			error() {
 				frappe.realtime.off('bi_bt_import_progress');
 				frappe.realtime.off('bi_bt_import_complete');
-				BIExcelImport._closeProgress();
+				frappe.dom.unfreeze();
 				frappe.msgprint({
 					title: __('Error'), indicator: 'red',
 					message: __('Network error starting import'),
@@ -282,6 +286,15 @@ const BIExcelImport = {
 		});
 	},
 
+	// Replace the message on the active freeze overlay without re-freezing
+	// (re-freezing stacks counter and breaks unfreeze pairing).
+	_setFreezeMessage(msg) {
+		const $msg = $('#freeze .freeze-message');
+		if ($msg.length) {
+			$msg.text(msg);
+		}
+	},
+
 	_showDateParseHelp(droppedCount, bankIntegrationName) {
 		const openForm = function () {
 			frappe.set_route('Form', 'Bank Statement Importer', bankIntegrationName);
@@ -352,20 +365,6 @@ const BIExcelImport = {
 		d.show();
 	},
 
-	_closeProgress() {
-		try {
-			if (frappe.cur_progress) {
-				frappe.cur_progress.$wrapper.modal('hide');
-				frappe.cur_progress.$wrapper.remove();
-				frappe.cur_progress = null;
-			}
-		} catch (e) { /* ignore */ }
-		if ($('.modal:visible').length === 0) {
-			$('.modal-backdrop').remove();
-			$('body').removeClass('modal-open');
-		}
-	},
-
 	_showErrorDetails() {
 		const errs = BIExcelImport._lastErrors || [];
 		if (!errs.length) {