Fix disabled functionality for Save PayPal and Venmo (PCP-4489)

[puntope]

Description

• Fix the "disabled" functionality for PayPal and Venmo metabox.
• Fix typo in property when "ownBrad" was used instead of "ownBrand"
• Improve tests coverage for SavePaymentMethods component

Steps to Test

1. Go to WooCommerce and select a country supporting Vaulting like USA
2. Go to PayPal Settings and see that you can toggle "Save PayPal and Venmo"
3. Go to WooCommerce and select a country NOT supporting Vaulting like Vietnam
4. Go to PayPal Settings and see that you CANNOT toggle "Save PayPal and Venmo"

Demo

Screen.Recording.2025-09-10.at.18.55.50.mov

[Copilot]

Pull Request Overview

This PR fixes the disabled functionality for PayPal and Venmo metabox by correcting typos in property names and improving feature availability checks. It also enhances test coverage for the SavePaymentMethods component.

• Fixes typo where "ownBradOnly" was used instead of "ownBrandOnly" in multiple locations
• Adds proper feature availability check for save payment methods functionality
• Implements comprehensive test coverage for the SavePaymentMethods component

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/js/__mocks__/@wordpress/i18n.js	Adds mock implementation for WordPress i18n functions to support testing
modules/ppcp-wc-gateway/src/WCGatewayModule.php	Enhances feature availability check by adding save payment methods eligibility validation
modules/ppcp-settings/resources/js/Components/Screens/Settings/Tabs/TabSettings.js	Fixes typo by removing incorrect "ownBradOnly" prop from CommonSettings
modules/ppcp-settings/resources/js/Components/Screens/Settings/Components/Settings/CommonSettings.js	Corrects parameter name from "ownBradOnly" to "ownBrandOnly"
modules/ppcp-settings/resources/js/Components/Screens/Settings/Components/Settings/Blocks/SavePaymentMethods.test.js	Adds comprehensive test suite for SavePaymentMethods component
modules/ppcp-settings/resources/js/Components/Screens/Settings/Components/Settings/Blocks/SavePaymentMethods.js	Fixes typo in parameter name and adds early return when feature is unavailable

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[github-actions]

Test using WordPress Playground

The changes in this pull request can be previewed and tested using a WordPress Playground instance.
WordPress Playground is an experimental project that creates a full WordPress instance entirely within the browser.

🔗 Test this pull request with WordPress Playground

What's included:

• ✅ WordPress (latest)
• ✅ WooCommerce (latest)
• ✅ PayPal Payments plugin v3.1.0-pr3650-17618366189-g3bc25bc (built from this PR)

Login credentials:

• Username: admin
• Password: password

Plugin Details:

• Version: 3.1.0-pr3650-17618366189-g3bc25bc
• Commit: 3bc25bc
• Artifact: woocommerce-paypal-payments-3.1.0-pr3650-17618366189-g3bc25bc

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[Narek13]

Thanks for working on this. Worked as expected for me.