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Render inline TeX math as Unicode in the TUI - #45501
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## What changed
Convert supported expressions inside `$...$` and `\(...\)` to readable Unicode in regular and streaming Markdown. For example, `$\alpha^2 + \beta_{10}$` renders as `α² + β₁₀`. Support a bounded TeX subset including symbols, superscripts, subscripts, square roots, and parenthesized fractions, with verbatim fallback for unsupported expressions.
Exclude code, links, HTML, and display equations from conversion, and avoid interpreting common currency and shell syntax as math. Preserve file citation paths and keep streaming cache boundaries outside display equations.
## Testing
Add snapshots for inline rendering and narrow wrapping, plus regression tests for unsupported input, parser limits, Markdown contexts, file citations, and streaming display boundaries across chunks and widths.
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Render inline TeX math as Unicode in the TUI
What changed
Convert supported expressions inside
$...$and\(...\)to readable Unicode in regular and streaming Markdown. For example,$\alpha^2 + \beta_{10}$renders asα² + β₁₀. Support a bounded TeX subset including symbols, superscripts, subscripts, square roots, and parenthesized fractions, with verbatim fallback for unsupported expressions.Exclude code, links, HTML, and display equations from conversion, and avoid interpreting common currency and shell syntax as math. Preserve file citation paths and keep streaming cache boundaries outside display equations.
Testing
Add snapshots for inline rendering and narrow wrapping, plus regression tests for unsupported input, parser limits, Markdown contexts, file citations, and streaming display boundaries across chunks and widths.