feat: Implement S3 image handling with a new resolver and widget, update agent display, and configure storage base URL.

lib/features/agents/data/models/agent_profile.dart

@@ -22,6 +22,7 @@ class AgentProfile {
   final AgentType? agentType;
   final AgentUser? user;
   final List<AgentFieldValue> fieldValues;
+  final String? createdAt;
 
   const AgentProfile({
     required this.id,
@@ -45,10 +46,26 @@ class AgentProfile {
     this.agentType,
     this.user,
     this.fieldValues = const [],
+    this.createdAt,
   });
 
   String get fullName => '$firstName $lastName'.trim();
 
+  /// Format "Member Since March 2024" from createdAt date string.
+  String get memberSinceText {
+    if (createdAt == null || createdAt!.isEmpty) return 'Member Since 2024';
+    try {
+      final date = DateTime.parse(createdAt!);
+      const months = [
+        'January', 'February', 'March', 'April', 'May', 'June',
+        'July', 'August', 'September', 'October', 'November', 'December',
+      ];
+      return 'Member Since ${months[date.month - 1]} ${date.year}';
+    } catch (_) {
+      return 'Member Since 2024';
+    }
+  }
+
   /// Get avatar URL — check agent avatar first, then user avatar
   String? get avatarUrl => avatar ?? user?.avatar;
 
@@ -175,6 +192,7 @@ class AgentProfile {
               ?.map((e) => AgentFieldValue.fromJson(e as Map<String, dynamic>))
               .toList() ??
           const [],
+      createdAt: json['createdAt'] as String?,
     );
   }
 }