leafletProxy not working

[MaddeeRubenson]

leafletProxy doesn't seem to be functional within shinyDashboard. See working example below where choosing different letters should change the circle color. Any insight appreciated.

library(shiny)
library(shinydashboard)
library(leaflet)
library(sf)

n = 100

df1 = data.frame(id = 1:n,
                 x = rnorm(n, 10, 3),
                 y = rnorm(n, 49, 1.8))

pts = st_as_sf(df1, coords = c("x", "y"), crs = 4326)

map <- leaflet() %>%
  addProviderTiles(provider = providers$CartoDB.DarkMatter) %>%
  addCircles(data = pts, group = "pts") %>%
  setView(lng = 10.5, lat = 49.5, zoom = 6)

ui <- dashboardPage(
  dashboardHeader(),

  dashboardSidebar(
    selectInput(inputId = 'click', 'Choose one:', c('A', 'B', 'C'))
  ),

  dashboardBody(
    fluidRow(
      div(
        id = "map",
        column(
          width = 12,
          leafletOutput('map', height = '800px')),
      )
    )
  )
)

server <- function(input, output) {
  output$map <- renderLeaflet({map})

  observeEvent(input$click, {
    col <- switch(input$click, 
                  'A' = 'green', 
                  'B' = 'yellow', 
                  'C' = 'white')

    m <- leafletProxy("map") %>%
      clearShapes() %>%
      addCircles(data = pts,
                 color = col)

    m
  })

}

shinyApp(ui, server)

[ismirsehregal]

For future readers - I posted an answer here. (The problems are not shinydashboard related)

[MaddeeRubenson]

Thanks for your help, @ismirsehregal