[Bug]: App crashes when trying to sort by multiple columns (Shift+click) #70

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Project Version

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Platform and OS Version

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Existing Issues

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What happened?

When using reactable.extras in a Shiny app, sorting by a single column in UI works correctly. However, when attempting to sort by multiple columns using Shift-click, the app throws the following error:

Warning: Error in rlang::sym: Can't convert a character vector to a symbol.
  55: <Anonymous>
  54: signalCondition
  53: signal_abort
  52: abort
  51: abort_coercion
  50: rlang::sym
  49: ::
shiny
observe
  48: <observer>
   1: runApp

Steps to reproduce

1. Run a Shiny app with reactable_extras_server displaying any simple data frame.
2. Click on a column header (e.g., column1) to sort.
3. Hold the Shift key and click on a second column header (e.g., column2) to add it to the sort.
4. The app immediately crashes with: Error in rlang::sym: Can't convert a character vector to a symbol.

Using defaultSorted with multiple columns:

1. In your reactable_extras_server call, add: defaultSorted = list("column1" = "desc", "column2" = "desc")
2. Run the Shiny app.
3. The app immediately crashes on startup with: Error in rlang::sym: Can't convert a character vector to a symbol.

Expected behavior

Shift-clicking to sort by multiple columns should work as it does in reactable, allowing the table to sort by multiple columns without errors.

Attachments

library(shiny)
library(reactable.extras)
library(data.table)

ui <- fluidPage(
  reactable_extras_ui("table")
)

server <- function(input, output, session) {
  data <- data.table(
    column1 = sample(letters, 100, TRUE),
    column2 = sample(LETTERS, 100, TRUE),
    column3 = rnorm(100)
  )
  
  reactable_extras_server(
    "table",
    data = data,
    filterable = TRUE,
    sortable = TRUE
    # Same error if you add:
    # defaultSorted = list("column1" = "desc", "column2" = "desc")
  )
}

shinyApp(ui, server)

Screenshots or Videos

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Additional Information

The same error occurs when defining the reactable parameter defaultSorted with more than one column, for example:
defaultSorted = list("column1" = "desc", "column2" = "desc")
This setup immediately triggers the same rlang::sym error on app startup.