mvc: translate grid view labels

[Opnwall]

Summary

• translate labels declared inside grid_view
• preserve the existing handling for all other grid view properties

Root cause

getFormGrid() translates a field's regular label, but a grid_view/label is copied into the grid record afterwards without passing through gettext(). This overwrites the translated field label with its untranslated grid-specific label.

For example, the Source NAT grid uses grid-specific labels such as Source, Port, and Destination, so those column headers remain in English even when the active locale contains translations for them.

Impact

Grid-specific column labels now use the active locale consistently with regular field labels.

Validation

• php -l src/opnsense/mvc/app/controllers/OPNsense/Base/ControllerBase.php
• git diff --check
• verified on OPNsense 26.7 with the Chinese locale; the Source NAT headers render as translated values

[AdSchellevis]

Suggested change

	$record[$key] = gettext((string)$item);
	if (strlen($text)) {
	$record[$key] = gettext((string)$item);
	}

good catch, these should be translated indeed, best also check for strsize for consistency with the dialog.

[AdSchellevis]

merged in 21ccf46