Add file uploads for photos and family icons

flutter_app/lib/models/family_member.dart

@@ -1,6 +1,7 @@
 class FamilyMember {
   final String id;
   final String name;
+  final String iconUrl;
   final String emoji;
   final String color;
   final int order;
@@ -8,6 +9,7 @@ class FamilyMember {
   const FamilyMember({
     required this.id,
     required this.name,
+    required this.iconUrl,
     required this.emoji,
     required this.color,
     required this.order,
@@ -17,6 +19,7 @@ class FamilyMember {
     return FamilyMember(
       id: json["_id"] as String? ?? "",
       name: json["name"] as String? ?? "",
+      iconUrl: json["iconUrl"] as String? ?? "",
       emoji: json["emoji"] as String? ?? "",
       color: json["color"] as String? ?? "",
       order: (json["order"] as num?)?.toInt() ?? 0,
@@ -24,6 +27,11 @@ class FamilyMember {
   }
 
   Map<String, dynamic> toJson() {
-    return {"name": name, "emoji": emoji, "color": color, "order": order};
+    return {
+      "name": name,
+      "iconUrl": iconUrl,
+      "color": color,
+      "order": order,
+    };
   }
 }