Fix remaining issues: update Cypress tests to work directly with WordPress, fix Markdown formatting

.wiki/Testing.md

@@ -7,9 +7,12 @@ This document explains how to use the testing framework for our plugin.
 Our testing framework uses:
 
 See also:
+
 * [.wiki/Architecture-Overview.md](Architecture-Overview.md) – high-level design
 * [.wiki/Multisite-Development.md](Multisite-Development.md) – deeper multisite guidance
 
+Components:
+
 * **wp-env**: For setting up WordPress environments (both single site and multisite)
 * **WordPress Playground**: For browser-based testing without Docker
 * **Cypress**: For end-to-end testing