`page_navbar` footer options

I'm making a multi-page Shiny app using page_navbar with multiple nav_panels, which includes a main set of panels plus "Help" and "About" panels at the end.

I've written some custom Shiny module code to add a sticky footer at the bottom of the viewport using divs and css classes, which I apply on a per-panel basis using (a) a class definition, which goes into the app as a free-floating HTML chunk, and (b) a wrapper function around each page that needs the footer. (I can provide more detail if this is unclear.)

ui <- page_navbar(
  title = "UI demo",
  id = "ui-demo",
  ),
  # This object defines the css classes for the footer with next/back buttons 
  # i.e., in the module file, navButtonsSetup <- tags$head(tags$style(HTML(" .sticky-footer { ...}" [etc.])))
  navButtonsSetup,
  
  nav_panel(
    "Overview",
    value = "overview",
    layout_columns(
      col_widths = c(-2, 8, -2),
      row_heights = c(1,6),
      random_text(nwords = 10),
      random_DT(nrow = 20, ncol = 5)
    ) |> addNavButtons("overview_page") # addNavButtons is a Shiny UI module
  ),
[etc.]

The footer contains "next" and "back" buttons to toggle between the three main nav panels. The "Help" and "About" pages do not have the footer, because I don't want users to navigate to them using the "next" button.

The "Help" and "About" pages do not have the footer, because I don't want users to navigate to them using the "next" button--that would be confusing.

When I run my app, I get the warning that Navigation containers expect a collection of `bslib::nav_panel()`/`shiny::tabPanel()`s and/or `bslib::nav_menu()`/`shiny::navbarMenu()`s and that I should Consider using `header` or `footer` if you wish to place content above (or below) every panel's contents.

I like the idea of using the built-in header or footer, but it doesn't currently work for my setup (as best as I can tell) because I have 3 panels with a footer, plus 2 panels that need to not have it.

Possible feature

Would it be feasible to either:

1. allow the header and footer arguments of page_navbar to take a list or a named vector, to match one item per page, such as: footer = list(Data = my_footer, Overview = my_footer, Help = NULL, About = NULL) , or
2. provide nav_panel with an overwrite_header / overwrite_footer option to let a specific panel "opt out" of the default header/footer?

Thanks in advance for reading through this, please let me know if you need any more details or if there's an existing solution I should know about. :)

Start by reproducing the warning with page_navbar, its nav_panel entries, and the current header/footer arguments in a small Shiny app. Read the page_navbar and nav_panel behavior around per-panel content, then determine whether selective footers can be supported without breaking navigation-container validation. Done means the requested panels show the footer while Help and About do not, with coverage for the chosen API.