v0.9.0 - Mermaid Diagrams and Table of Contents

Added

• Mermaid diagrams: Full support for flowcharts, sequence diagrams, class diagrams, and more
• Theme-aware diagrams: Diagrams automatically match your dark/light theme colors
• Table of Contents: Quick navigation panel (Ctrl+G) with current section highlighting
• Live theme preview: See color changes instantly in the settings modal
• New shortcuts: Ctrl+G (TOC), Ctrl+P (Print), Ctrl+H (Help), Ctrl+[/] (prev/next file)

Changed

• Settings modal reorganized with tabbed UI/Markdown/Diagrams sections
• Table cells now consistently left-aligned
• Improved theme color organization with diagram-specific tokens

Fixed

• Mermaid diagrams not rendering in production builds (externalized to avoid Vite bundling issues)
• Changelog not accessible in production builds