fix(control-panel): use iso_sf.png in map preview banner

modules/legacy/modules/control_panel/lib/src/shared/widgets/device_map.dart

@@ -124,9 +124,6 @@ class LocationBanner extends ConsumerWidget {
     final deviceName = localDevice != null
         ? (name != null && name.isNotEmpty ? name : localDevice.identificator)
         : null;
-    final initial = deviceName != null && deviceName.isNotEmpty
-        ? deviceName[0].toUpperCase()
-        : null;
 
     final addressText = [
       position.address?.street,
@@ -157,25 +154,11 @@ class LocationBanner extends ConsumerWidget {
           ),
           child: Row(
             children: [
-              if (initial != null)
-                Container(
-                  width: isCompact ? 30 : 42,
-                  height: isCompact ? 30 : 42,
-                  decoration: BoxDecoration(
-                    color: primaryColor.withValues(alpha: 0.12),
-                    shape: BoxShape.circle,
-                  ),
-                  child: Center(
-                    child: Text(
-                      initial,
-                      style: TextStyle(
-                        fontSize: isCompact ? 13 : 18,
-                        fontWeight: FontWeight.w700,
-                        color: primaryColor,
-                      ),
-                    ),
-                  ),
-                ),
+              Image.asset(
+                'assets/shared/images/iso_sf.png',
+                width: isCompact ? 30 : 42,
+                height: isCompact ? 30 : 42,
+              ),
               SizedBox(width: isCompact ? 6 : 10),
               Expanded(
                 child: Column(