Reorganize the toolbar into inline marks (bold, italic, strikethrough,
inline code) and blocks (lists, fenced code block), with the Type glyph
for the paragraph/heading picker. Marks derive from the shared MARKS
table; code block toggling reuses the same selection-probe lookup so
toggle-off always agrees with the button's active state. A fresh empty
strikethrough pair (~~~~) parses as a tilde code fence, so empty-pair
removal and code-block detection recognize doubled mark tokens.
Bold (and italic/code) now remove an empty just-inserted delimiter pair instead of nesting more asterisks, and strip real marks whichever way the selection was made; clicking Link inside a link unwraps it instead of inserting [](); the three list modes convert between each other (bullet on a task line no longer leaves '[ ] ...' behind), toggle off any ordered number, respect indentation, and apply across multi-line selections; list/heading edits keep the cursor in place (task insert on an empty line lands after the marker).
Structurally, highlight and toggle now share one line-mode detector so they cannot disagree; the heading regex is shared with headingDecorations, so indented headings render styled; one MARKS table drives all inline-mark behavior; run("link") is total (URL doubles as label on empty selection, now inserted inline rather than as its own block); the unused getSelectedText contract method and the dead markdown-list-detection.ts util are removed.
Known divergence, not addressed here: markdown-task-actions.ts TASK_LINE_REGEXP accepts ordered task items ('1. [ ]') which the editor's TASK_LINE does not; the viewer toggles such checkboxes but the editor toolbar won't detect them.
Rebuild the memo editor as a single CodeMirror 6 "decorated source"
editor. The document is the raw markdown, stored verbatim and styled in
place (markers stay visible), so the editor never serializes a tree back
to markdown — removing the round-trip fidelity bug class (inline images,
setext headings, ordered-list indentation, HTML entities) that the old
editor needed per-case patches for.
- MemoEditor/Editor: CodeMirror 6 + lang-markdown (GFM). Tokens, heading
lines, #tag/@mention, and the autocomplete popover are styled in plain
CSS (Editor/editor.css) with theme tokens, not a CSS-in-JS theme.
- Tab/Shift-Tab nest/outdent list items (marker-aware, ordered items
renumbered so nesting is CommonMark-valid); Escape blurs; #tag
autocomplete sourced from useTagCounts.
- Focus-mode toolbar reimplemented as markdown-text ops; active state read
from the Lezer tree via the backend-agnostic formatting/commands catalog.
- Remove the old serialize-back-to-markdown editor (its Editor dir,
PlainEditor, the editor-mode system) and its now-unused dependencies
(marked, textarea-caret, and the rich-text editor packages).
- Consolidate toolbar components under Toolbar/. Read-only MemoContent
rendering is unchanged.
