Version 1.2.1 — Firefox sign-in fix

• Fixes signing in and staying signed in on Firefox (sidebar could fail to talk to vellio.ai because of browser CORS / Origin handling).
• API requests from the Firefox build now go through the extension background script with host permissions; Chrome/Edge behavior unchanged.
• Requires signing in again if you still have an older session cookie.

What’s new
• Prompt library in the toolbar — save, search, and filter prompts by tag
• Built-in AI chat with streaming replies (bring your own API keys)
• Dark UI aligned with the Vellio web app
• Pro upgrade opens our pricing page in a new tab