`image-width` and `image-height` not working with `twitter-card`

Bug description

Despite specifying image-width and image-height, the respective properties do not appear in the resulting HTML.

Steps to reproduce

Start a new Quarto book project in RStudio and set _quarto.yml to the following:

project:
  type: book

book:
  title: "temp"
  author: "author"
  date: "2025. 02. 03."
  twitter-card:
    image: cover.png
    image-width: 1196
    image-height: 1185
  chapters:
    - index.qmd
    - intro.qmd
    - summary.qmd
    - references.qmd

bibliography: references.bib

format:
  html:
    theme:
      - cosmo
      - brand
  pdf:
    documentclass: scrreprt

Expected behavior

The respective properties (I think twitter:image:height and twitter:image:width) should appear in the HTML.

Actual behavior

The relevant part of the resulting HTML:

<meta name="twitter:title" content="temp">
<meta name="twitter:description" content="">
<meta name="twitter:image" content="cover.png">
<meta name="twitter:card" content="summary_large_image">

I.e., image-width and image-height does not appear at all.

Your environment

• IDE: RStudio 2024.12.0 Build 467
• OS: Windows 10

Quarto check output

Quarto 1.6.40
[>] Checking environment information...
      Quarto cache location: \AppData\Local\quarto
[>] Checking versions of quarto binary dependencies...
      Pandoc version 3.4.0: OK
      Dart Sass version 1.70.0: OK
      Deno version 1.46.3: OK
      Typst version 0.11.0: OK
[>] Checking versions of quarto dependencies......OK
[>] Checking Quarto installation......OK
      Version: 1.6.40
      Path: C:\Program Files\Quarto\bin
      CodePage: 1250

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

[>] Checking LaTeX....................OK
      Using: TinyTex
      Path: \AppData\Roaming\TinyTeX\bin\windows\
      Version: 2024

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

[>] Checking Python 3 installation....OK
      Version: 3.13.1
      Path: C:/Program Files/Python313/python.exe
      Jupyter: 5.7.2
      Kernels: python3

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

[>] Checking R installation...........OK
      Version: 4.4.2
      Path: C:/PROGRA~1/R/R-44~1.2
      LibPaths:
        - /AppData/Local/R/win-library/4.4
        - C:/Program Files/R/R-4.4.2/library
      knitr: 1.49
      rmarkdown: 2.29

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

Reproduce the issue with the shown _quarto.yml configuration and inspect the generated HTML metadata. Trace how the twitter-card options are processed, then verify that image-width and image-height produce the expected twitter:image:width and twitter:image:height tags.