fix(code-block): fix normalizer and insertBreak for syntax highlighting #4837
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…structure use wrapNodes instead of setNodes in normalizer to properly wrap bare text children in code_line elements. reset decoration cache after insertBreak so new lines get syntax highlighting immediately. - normalizer: wrapNodes instead of setNodes for bare text in code_block - insertBreak: call resetCodeBlockDecorations after splitting fixes udecode#4520 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
wrapNodesinstead ofsetNodesto properly wrap bare text children incode_lineelements.setNodeswas producing malformed nodes like{ text: "...", type: "code_line" }instead of proper{ type: "code_line", children: [{ text: "..." }] }structure.resetCodeBlockDecorationsafter splitting to bust the WeakMap cache and force re-highlighting on all lines.These two fixes together resolve the issue where only the first line of a code block gets syntax highlighting.
Fixes #4520
Related: #4399, #3407
Test plan