v1.99.4

What's Changed

• Stop showing unknown models as "Coming Soon" by @AnthonyRonning in #286
• Increase delete button hitbox in chat history list by @AnthonyRonning in #282
• Add explicit katex dependency for LaTeX support by @AnthonyRonning in #290
• Update Gemma model ID to gemma-3-27b by @AnthonyRonning in #291
• Add anonymous/guest authentication with Bitcoin-only payment enforcement by @AnthonyRonning in #288
• Fix mobile responsiveness for anonymous signup dialogs by @AnthonyRonning in #292

Full Changelog: v1.99.3...v1.99.4