v1.2.0 — Editor Blocks & Image Optimization

- Math/LaTeX Block: Write equations directly in the editor with KaTeX rendering and live preview - Button/CTA Block: Add call-to-action buttons with customizable text, links, and optional captions — also available when pasting a URL - Cmd+K Link Shortcut: Select text and press Cmd+K to quickly create a link, just like Google Docs - Image Optimization: Uploaded images are automatically resized (max 2000px), compressed, and non-transparent PNGs/GIFs are converted to JPEG — upload limit increased to 5 MB - Custom Domain Fix: Verified custom domains no longer disappear from settings — a new "Verified domains" section shows domains ready to be set as primary - Newsletter Visibility: Unlisted articles no longer accidentally send newsletter emails — emails are only sent when an article is set to public - OAuth Token Refresh: Fixed a critical issue where token refresh failures could permanently lock users out of AT Protocol features until reauthenticated - PowerShell Syntax Highlighting: Code blocks now support PowerShell syntax highlighting for @mrpowershell.com - Stability: Graceful handling of AT Protocol auth failures during publish, patch operation errors, and theme color defaults