feat(chat): render streamed markdown progressively, token by token#41
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…markdown Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…streamed markdown Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…Markdown Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Final-review hardening: marked collapses \r\n to \n internally, so token.raw would be shorter than the source and activeStart would point at the wrong index for CRLF input. Normalize at entry; output is unchanged for the usual LF case. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Render streamed assistant markdown progressively, token by token, instead of popping in whole at blank-line block boundaries — list items appear one by one, prose appears line by line, and inline emphasis is closed optimistically while it streams.
Isolated to
ui/src/utils/markdown.ts; themarked → sanitize → v-htmlpipeline is unchanged.renderStreamingMarkdownnow feeds it a safe buffer from two pure helpers:streamingSafeBuffer(lexer-driven per-block-type rule) andrepairInline(synthesizes closers for open`/*/_/~~). Mermaid fences and pre-delimiter tables are held back; real tables commit complete rows. Covered by 29 unit tests.Why: long lists and paragraphs previously stayed hidden until their closing blank line, making streaming feel laggy and janky.
Heads-up:
renderStreamingMarkdownis on the render path for every streamed message. The final (non-streaming) render short-circuits to the unchangedrenderMarkdown, so committed messages are unaffected — only mid-stream frames use the new logic. Brief, self-correcting reflow of ambiguous inline markup mid-stream is an accepted, documented trade-off.