- Fix PostgreSQL function highlighting by disabling doubleDollarQuotedStrings
in extended PostgreSQL dialect, enabling PL/pgSQL syntax highlighting
inside $ blocks
- Add complete custom editor theme system with multi-theme management
(create, rename, duplicate, delete), visual color editor (12 colors),
JSON import/export, real-time preview, and 12 preset color schemes
- Add background/foreground color customization with system theme defaults
- Optimize EditorSettingsDialog layout: 2-column grid with font selector
taking available space and theme dropdown grouped with custom theme button
- Add i18n support for custom theme UI (en, zh-CN, zh-TW, es)
- Fix Tauri production build by adding custom-protocol feature
- Update .gitignore for temporary build artifacts
Closes t8y2#788
Co-authored-by: Sam <14344444@@qq.com>