fix: Improve data fetching reliability using `httr` with timeout and stabilize UI tab switching with direct JavaScript.

funs/scraper.R

@@ -2,6 +2,7 @@ library(rvest)
 library(dplyr)
 library(stringr)
 library(readr)
+library(httr)
 
 #' Scrape JMA Data (Daily, Hourly, 10-Minute, Monthly)
 #'
@@ -43,8 +44,18 @@ get_jma_data <- function(block_no, year, month, day = NULL, prec_no, type = "s1"
 
   message(sprintf("Downloading %s data from: %s", resolution, url))
 
+  message(sprintf("Downloading %s data from: %s", resolution, url))
+  
+  # Use httr::GET with timeout to prevent hanging
   page <- tryCatch(
-    read_html(url),
+    {
+      resp <- httr::GET(url, httr::timeout(10))
+      if (httr::status_code(resp) != 200) {
+        warning(sprintf("Failed to download data: HTTP %s", httr::status_code(resp)))
+        return(NULL)
+      }
+      read_html(resp)
+    },
     error = function(e) {
       warning("Failed to download data: ", e)
       return(NULL)

server.R

@@ -121,9 +121,10 @@ server <- function(input, output, session) {
                 } else if (view %in% c("dashboard-plots", "dashboard-data")) {
                     session$sendCustomMessage("switchTab", list(tabId = "Dashboard"))
                     if (view == "dashboard-data") {
-                        shinyjs::delay(200, {
-                            # Switch to Data subtab
-                            updateNavsetCardPill(session, "dashboard_subtabs", selected = "Data")
+                        shinyjs::delay(800, {
+                           # Click the tab directly; assumes id="dashboard_subtabs" -> li a[data-value="Data"]
+                           # Use robust JS to switch tab as updateNavsetCardPill might fail during init
+                           shinyjs::runjs("$('a[data-value=\"Data\"]').tab('show');")
                         })
                     }
                 }
@@ -704,7 +705,7 @@ server <- function(input, output, session) {
                 fetch_queue_idx(idx + 1)
                 fetch_stage(2)
             })
-        }, 0.1)
+        }, 0.5)
         fetch_stage(-1)
     })