This update marks the finalization of the Revamp 4.2 release cycle (3a-3f), bringing a complete overhaul to system settings, AI prompt management, engagement tracking, and integration hubs. Key highlights include an iOS-inspired settings panel with atomic saves and undo functionality, an AI prompt editor with preview/test capabilities, and a new "Who's drifting" engagement tool for identifying at-risk students. We also hardened system security by restricting tenant-specific events and API guardrails to server-validated headers rather than relying on potentially forged caller inputs.