Give the gutter its own HeadingDecoratorSettings following the same
pattern as other view types (toggle + config panel). Add a font size
dropdown mapped to Obsidian's --font-ui-* CSS variables. Default gutter
opacity is now 100% instead of the standard 20%.
Add an optional gutter column renderer as an alternative to inline
Decoration.widget placement. When enabled, heading decorations render
in a separate CodeMirror gutter outside the document flow, preserving
text alignment.
- Extract shared counter creation into common/counter-factory.ts
- Add HeadingGutterMarker (GutterMarker) and createHeadingGutterExtension
- Support toggling between inline and gutter modes at runtime via
in-place extension swap (workspace.updateOptions pattern)
- Add useGutter toggle and gutterPosition dropdown to settings UI
- Add i18n strings for en, zh, zh-TW
- Add gutter CSS with opacity variants and table-cell hiding
