v0.5.0

• 🚀 Start at login — a switch in Settings has macOS launch Pullover when you sign in, so the inbox is already watching without you remembering to open it. Nothing appears on screen; it just joins the menu bar.
• ⏳ Rate limits — hitting GitHub's rate limit no longer shows a raw API error and keeps retrying into a wall. Pullover says the limit is reached, tells you how long until it lifts, and waits that long before trying again.
• 💚 Settings footer — the footer is now properly set off from the settings above it, with links to the source and a Sponsor button.