Bug Fixes

• Student safety: Message screening runs more reliably for student chats.
• School moderation: The moderation list shows correct category labels, opens the right student conversation, and no longer includes deleted chats.
• Tutor Studio: Studio tools (such as flashcards) only appear in Tutor chats, not in general Chat.
• Chat home: Example prompts updated, including a website example; the model list no longer shows Tutor-only Studio items in general Chat.