feat(a11y): toolbar keyboard navigation (Arrow keys, Home, End)
feat(a11y): aria-live region for screen reader announcements on mode change
feat(a11y): enhance focus-visible style (outline-offset: 2px, hide on mouse focus)
feat(core): Zen mode (editor.toggleZen() / exec('zen'))
- Toggle with Ctrl+Shift+Z shortcut concept
- Auto-hide toolbar and statusbar, mouse to top edge reveals toolbar
- Centered editor pane with max-width constraint
feat(core): heading-aware scroll sync v2
- Sync preview scroll to nearest heading before cursor position
- Falls back to proportional sync when no headings found
feat(core): Word wrap toggle (editor.toggleWordWrap() / setWordWrap(bool))
feat(plugins): shortcutHelp preset plugin
- Press '?' to open keyboard shortcuts overlay panel
- Lists built-in + user-registered shortcuts
- Click overlay or press Escape to close
style: Zen mode CSS, sr-only class, focus-visible refinement
test: 3 new tests for Zen mode, WordWrap, shortcutHelp (535 total)
chore: bump version 0.1.11 → 0.1.12 across all files
feat(core): line number gutter with current line highlight
- .me-gutter rendered alongside textarea, sync-scrolls with content
- .me-gutter-active highlights the line containing the cursor
- config.lineNumbers (default true) to toggle
feat(core): smart Enter auto-formatting
- List continuation: '- ' / '1. ' auto-insert on Enter at end of list item
- Ordered list auto-increment: '1.' → '2.'
- Quote continuation: '> ' auto-insert on Enter at end of quote line
- Empty list/quote item: Enter removes the marker (end list)
feat(core): bracket/quote auto-close
- (), [], {}, <>, "", '', ``, **, __ auto-close pairs
- Selection wrapping: select text then press ( → wraps as (text)
- config.autoBrackets (default true) to toggle
feat(core): drag & drop file support
- Drop image files → auto base64 inline insert 
- Drop text/code files → insert file contents
- Drop external text from browser → insert at cursor
feat(core): outline/TOC panel
- Extracts headings from rendered HTML preview
- Nested tree with indentation by heading level
- Click to scroll-jump in both preview and textarea
- config.outline (default false) to toggle
style: gutter, outline panel, current line highlight CSS
test: 11 new tests for gutter, auto-format, bracket close, outline (532 total)
chore: bump version 0.1.6 → 0.1.7 across all files, site, types
thzxx