fix: align Mermaid ASCII box borders for CJK/emoji labels
beautiful-mermaid@1.1.3 measures label width in UTF-16 code units, but terminals render East Asian characters (Hangul/CJK/kana) and emoji 2 columns wide, so fenced mermaid blocks in assistant messages and render_mermaid tool output had misaligned box borders for non-Latin labels (upstream: lukilabs/beautiful-mermaid#119, #122). Adds a patchedDependencies entry rebuilding the ASCII renderer to measure terminal display columns: grapheme-cluster segmentation (Intl.Segmenter), wcwidth-style policy (East Asian Wide + emoji presentation + ZWJ/VS16/flag sequences = 2 columns; text-presentation symbols like the renderer's own arrowheads stay narrow), and atomic wide-glyph cell pairs so label collisions cannot shift row widths. The patch modifies only existing files (bun cannot patch in new files, and the exports "bun" condition loads src/ directly, so both src and dist are patched). It mirrors the upstream PR and should be dropped once the fix ships in a beautiful-mermaid release; a new CJK alignment regression test keeps that transition honest. Verified: bun test packages/coding-agent/test/modes/components/ assistant-message-mermaid.test.ts (8 pass, incl. new display-column alignment regression test); bun test packages/utils (154 pass); Korean flowchart renders with uniform display-column row widths through the patched package.
This commit is contained in:
chan1103