Using headings with profiles in book format always shows the first heading of the file

Bug description

I am using the project profiles to support multi-language documents (i.c. Dutch & French) by only showing the text for that language. This works nicely, but when trying to use the same method for headings the first heading always shows up even when it should not be shown based on the profile used.

Steps to reproduce

https://github.com/mvwestendorp/bug-heading-quarto-profile

quarto render . --profile NL renders a correct version in _report-NL
quarto render . --profile FR renders an incorrect version in _report-FR

Expected behavior

Only headings that are visible based on the project's profile are visible in the output

Actual behavior

The first heading of a file is always shown regardless of project profile

Your environment

• IDE: notepad
• Windows 10

Quarto check output

[>] Checking versions of quarto binary dependencies...
      Pandoc version 3.1.1: OK
      Dart Sass version 1.55.0: OK
[>] Checking versions of quarto dependencies......OK
[>] Checking Quarto installation......OK
      Version: 1.3.433
      Path: C:\Program Files\Quarto\bin
      CodePage: 1252

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

[>] Checking Python 3 installation....OK
      Version: 3.11.4
      Path: C:/Program Files/Python311/python.exe
      Jupyter: (None)

      Jupyter is not available in this Python installation.
      Install with py -m pip install jupyter

[>] Checking R installation...........OK
      Version: 4.3.1
      Path: C:/PROGRA~1/R/R-43~1.1
      LibPaths:
        - E:/Rlibrary
        - C:/Program Files/R/R-4.3.1/library
      knitr: 1.42
      rmarkdown: 2.21

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

Start by cloning the linked reproduction and running quarto render . --profile NL and quarto render . --profile FR to compare the generated book output. Trace heading handling when profile-hidden content precedes the first heading; done means the FR output omits headings excluded by its profile while NL remains correct.