Show HN: Howler, a macOS menu bar AI that burns the chat after reading

Howler is a macOS menu bar AI app that opens a parchment-style letter with ⌥H, streams answers at a hand's pace, and burns the conversation when you press Esc or click outside, saving nothing. It supports chat-completions, Anthropic and Gemini formats with configurable base URL, model, body and headers, and stores only the model setup, prompt instructions, shortcut and API key in the Keychain. It is signed with a Developer ID and notarized by Apple, self-updates via Sparkle from v0.1.7, and is MIT licensed.