LaTeX equation with left{ right. and aligned cannot compile in typst format.

I have:

• searched the issue tracker for similar issues
• installed the latest version of Quarto CLI
• formatted my issue following the Bug Reports guide

Bug description

LaTeX equation with left{ right. and aligned cannot compile in typst format.

Steps to reproduce

---
title: Untitled
format: typst
keep-typ: true
---

$$
  \left\{\begin{matrix}
  \begin{aligned}
   Y&=bx+a+e \\
   E\left (e \right )&=0, \quad D\left (e \right )=\sigma ^{2}
  \end{aligned} 
  \end{matrix}\right.
$$

Actual behavior

Expected behavior

Your environment

• IDE: RStudio, 2026.01.1 Build 403
• OS: Windows 11 IoT LTSC
• Quarto: 1.10.0

Quarto check output

Quarto 1.10.0
[>] Checking environment information...
      Quarto cache location: C:\Users\JTTWT\AppData\Local\quarto
[>] Checking versions of quarto binary dependencies...
      Pandoc version 3.8.3: OK
      Dart Sass version 1.87.0: OK
      Deno version 2.4.5: OK
      Typst version 0.14.2: OK
[>] Checking versions of quarto dependencies......OK
[>] Checking Quarto installation......OK
      Version: 1.10.0
      Path: C:\Program Files\Quarto\bin
      CodePage: 936

[>] Checking tools....................OK
      TinyTeX: (external install)
      Chromium: (not installed)
      Chrome Headless Shell: (not installed)
      VeraPDF: (not installed)

[>] Checking LaTeX....................OK
      Using: TinyTex
      Path: C:\Users\JTTWT\AppData\Roaming\TinyTeX\bin\windows\
      Version: 2025

[>] Checking Chrome Headless....................OK
      Using: Chrome found on system
      Path: C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
      Source: Windows Registry

[>] Checking basic markdown render....OK

[>] Checking R installation...........OK
      Version: 4.5.3
      Path: C:/PROGRA~1/R/R-45~1.3
      LibPaths:
        - C:/Users/JTTWT/AppData/Local/R/win-library/4.5
        - C:/Program Files/R/R-4.5.3/library
      knitr: 1.51
      rmarkdown: 2.31

[>] Checking Knitr engine render......OK

[>] Checking Python 3 installation....(None)

      Unable to locate an installed version of Python 3.
      Install Python 3 from https://www.python.org/downloads/

[>] Checking Julia installation...

Start with the minimal .qmd reproduction in the issue and render it with Quarto's typst format, keeping the generated Typst output. Compare the result with the expected equation, then trace how the \left{, \right., matrix, and aligned constructs are converted. Done means this example compiles and produces the expected layout without breaking related equations.