Week 5: Sign-up safely + Clear chat history shipped
- How to sign up for ChatGPT, Gemini, and Copilot safely — official URLs, free tiers, and day-one privacy toggles
- How to clear your AI chat history — ChatGPT, Gemini, and Copilot steps plus "improve the model" vs visible history
- Updated /start and /safety hubs — removed Coming soon now that both sections have live guides
- Cross-links between wrong-app, first-5-prompts, never-paste, and privacy-paste-check