bslib value box fullscreen mode expands to full page (vertically) when format: html: page-layout is set to full

[EconomiCurtis]

Bug description

Do let me know if I should be sharing this with the Shiny bslib team instead of sharing this here.

The issue is apparent with this reprex,

With format: html: page-layout: article, fullscreen mode for bslib value boxes appear as expected. When set to full, the value box's full screen mode expands vertically to fill the entire page.

page-layout: article

page-layout: full

Steps to reproduce

reprex

And the example below, change page-layout: from full to article.

---
title: "fullscreen-vb"
format:
  html:
    page-layout: full
---

```{r}
library(shiny)
library(bslib)
library(plotly)

sparkline <- plot_ly(economics) %>%
  add_lines(
    x = ~date, y = ~psavert,
    color = I("white"), span = I(1),
    fill = 'tozeroy', alpha = 0.2
  ) %>%
  layout(
    xaxis = list(visible = F, showgrid = F, title = ""),
    yaxis = list(visible = F, showgrid = F, title = ""),
    hovermode = "x",
    margin = list(t = 0, r = 0, l = 0, b = 0),
    font = list(color = "white"),
    paper_bgcolor = "transparent",
    plot_bgcolor = "transparent"
  ) %>%
  config(displayModeBar = F) %>%
  htmlwidgets::onRender(
    "function(el) {
      var ro = new ResizeObserver(function() {
         var visible = el.offsetHeight > 200;
         Plotly.relayout(el, {'xaxis.visible': visible});
      });
      ro.observe(el);
    }"
  )


value_box(
  title = "Personal Savings Rate",
  value = "7.6%",
  p("Started at 12.6%"),
  p("Averaged 8.6% over that period"),
  p("Peaked 17.3% in May 1975"),
  showcase = sparkline,
  full_screen = TRUE,
  theme = "success"
)
```

Expected behavior

value box fullscreen mode in a quarto box to fill the browser window

Actual behavior

the value box filled the full page, expending vertically beyond the space you'd want it to go.

Your environment

No response

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: 1.3.450
Path: /Applications/quarto/bin

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

[✓] Checking Python 3 installation....OK
Version: 3.9.6
Path: /Library/Developer/CommandLineTools/usr/bin/python3
Jupyter: (None)

  Jupyter is not available in this Python installation.
  Install with python3 -m pip install jupyter

[✓] Checking R installation...........OK
Version: 4.3.1
Path: /Library/Frameworks/R.framework/Resources
LibPaths:
- /Library/Frameworks/R.framework/Versions/4.3-arm64/Resources/library
knitr: 1.44
rmarkdown: 2.25

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