fix(transport_helper): add color parsing for line

lib/transport_helper.dart

@@ -782,10 +782,10 @@ class Line {
       "lineid": lineId,
       "destination": destination,
       "direction": direction,
-      "mode": mode,
+      "mode": mode.toString(),
       "name": name,
-      "fgcolor": fgColor,
-      "bgcolor": bgColor,
+      "fgcolor": fgColor.toString(),
+      "bgcolor": bgColor.toString(),
     };
   }
 
@@ -794,7 +794,12 @@ class Line {
       lineId: map["lineId"] as String,
       destination: map["destination"] as String,
       direction: map["direction"] as String,
-      mode: map["mode"] as VehicleType,
+      // Source - https://stackoverflow.com/a/44060511
+      // Posted by Collin Jackson, modified by community. See post 'Timeline' for change history
+      // Retrieved 2026-07-29, License - CC BY-SA 4.k
+      mode: VehicleType.values.firstWhere(
+        (e) => e.toString() == 'VehicleType.${map["mode"] as String}',
+      ),
       name: map["name"] as String,
       fgColor: map["fgcolor"] as Color,
       bgColor: map["bgcolor"] as Color,
@@ -1092,11 +1097,28 @@ class Color {
     required this.b,
   });
 
+  factory Color.fromStringRGBComma(String input) {
+    List<String> split = input.split(",");
+    if (split.length == 3) {
+      return Color(
+        r: int.parse(split[0]),
+        g: int.parse(split[1]),
+        b: int.parse(split[2]),
+      );
+    }
+    return Color(r: 128, g: 128, b: 128);
+  }
+
   factory Color.fromJson(Map<String, dynamic> json) => Color(
     r: json["r"],
     g: json["g"],
     b: json["b"],
   );
+
+  @override
+  String toString() {
+    return '$r,$g,$b';
+  }
 }
 
 enum VehicleType {
@@ -1106,4 +1128,4 @@ enum VehicleType {
   subway,
   regionalTrain,
   PLACEHOLDER,
-}
+}