Display API key in the configuration for WhatsApp Channel

Editor assessment

The subject states a concrete UI addition, the API key is displayed in the WhatsApp channel configuration, and chore is a doubtful type for a visible feature where feat fits better, though the straddle is arguable. No scope, no body explaining who needs the key visible or whether reveal-on-demand hides it from shoulder-surfing, the usability and security detail worth a line. No footers. The trailing pull-request number is the conventional squash-merge marker. Hygiene otherwise fine. Understandable, valid, miscast, and thin.