Syntax highlighting: wires the already-pinned HighlighterSwiftBridge
(MarkdownEngineCodeBlocks) into services.syntaxHighlighter on every
NativeTextViewWrapper, shared via one CodeSyntaxHighlighting.shared
instance (JSContext init is expensive, don't build one per text view).
Line numbers: app-side CodeBlockLineNumberGutter overlay positioned via
onCodeBlockSelectionChange's rect, widens codeBlock.horizontalIndent to
make room. Marked WIP: line-number overlays (and the engine's own
built-in copy-button overlay) stay empty on cold document load until
the user's first click/keystroke — a real gap in swift-markdown-engine's
rebuild path (cachedCodeBlockTokens is only ever seeded by AppKit text-
delegate callbacks, not the programmatic text-binding rebuild), not
fixable from the app side without patching the package. See
TODO.local.md for the full trace and options.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Puranjay Savar MattasandClaude Sonnet 5
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