dashboard: keep overview values visible when returning from battery detail

firmware/esp32-s3-dashboard/dashboard_config.h

@@ -1,6 +1,6 @@
 #pragma once
 
-static const char *DASHBOARD_VERSION = "0.1.101-battery-detail-cache-reset";
+static const char *DASHBOARD_VERSION = "0.1.102-keep-overview-data-on-return";
 
 // Update these if your Cargo ESP AP credentials are different.
 //static const char *CARGO_WIFI_SSID = "OverlandController";

firmware/esp32-s3-dashboard/esp32-s3-dashboard.ino

@@ -686,13 +686,9 @@ static void close_battery_detail_screen()
         lv_obj_add_flag(battery_detail_page, LV_OBJ_FLAG_HIDDEN);
     }
 
+    // Keep the existing overview widgets exactly as-is.
+    // The next successful API poll will refresh them naturally.
     current_dashboard_screen = SCREEN_OVERVIEW;
-    
-    reset_overview_widget_cache();
-    fast_status_refresh_requested = true;
-    metadata_refresh_requested = true;
-invalidate_overview_widget_cache();
-    refresh_dashboard_widgets();
 }
 
 static void create_battery_detail_screen()