fix: Resolve compilation errors in Groups feature

sojorn_app/lib/screens/clusters/clusters_screen.dart

@@ -2,7 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../../models/cluster.dart';
-import '../../models/group.dart';
+import '../../models/group.dart' as group_models;
 import '../../providers/api_provider.dart';
 import '../../services/api_service.dart';
 import '../../services/capsule_security_service.dart';
@@ -34,8 +34,8 @@ class _ClustersScreenState extends ConsumerState<ClustersScreen>
   String _selectedCategory = 'all';
   
   // Groups system state
-  List<Group> _myUserGroups = [];
-  List<SuggestedGroup> _suggestedGroups = [];
+  List<group_models.Group> _myUserGroups = [];
+  List<group_models.SuggestedGroup> _suggestedGroups = [];
   bool _isGroupsLoading = false;
   bool _isSuggestedLoading = false;
 
@@ -159,7 +159,7 @@ class _ClustersScreenState extends ConsumerState<ClustersScreen>
     if (mounted) setState(() => _isSuggestedLoading = false);
   }
 
-  void _navigateToGroup(Group group) {
+  void _navigateToGroup(group_models.Group group) {
     // TODO: Navigate to group detail screen
     if (kDebugMode) print('Navigate to group: ${group.name}');
   }

sojorn_app/lib/services/api_service.dart

@@ -929,23 +929,6 @@ class ApiService {
     return (data['groups'] as List?)?.cast<Map<String, dynamic>>() ?? [];
   }
 
-  Future<void> joinGroup(String groupId) async {
-    await _callGoApi('/capsules/$groupId/join', method: 'POST');
-  }
-
-  Future<Map<String, dynamic>> createGroup({
-    required String name,
-    String description = '',
-    String privacy = 'public',
-    String category = 'general',
-  }) async {
-    return await _callGoApi('/capsules/group', body: {
-      'name': name,
-      'description': description,
-      'privacy': privacy,
-      'category': category,
-    });
-  }
   
   Future<Map<String, dynamic>> createCapsule({
     required String name,
@@ -1033,9 +1016,6 @@ class ApiService {
     await _callGoApi('/capsules/$groupId/members/$memberId', method: 'PATCH', body: {'role': role});
   }
 
-  Future<void> leaveGroup(String groupId) async {
-    await _callGoApi('/capsules/$groupId/leave', method: 'POST');
-  }
   
   Future<void> updateGroup(String groupId, {String? name, String? description, String? settings}) async {
     await _callGoApi('/capsules/$groupId', method: 'PATCH', body: {

sojorn_app/lib/widgets/group_card.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../models/group.dart';
-import '../services/api_service.dart';
+import '../providers/api_provider.dart';
 import '../theme/app_theme.dart';
 import '../theme/tokens.dart';
 import '../utils/error_handler.dart';
@@ -247,7 +247,7 @@ class _GroupCardState extends ConsumerState<GroupCard> {
                 widget.group.description,
                 style: TextStyle(
                   fontSize: 13,
-                  color: SojornColors.textSecondary,
+                  color: Colors.grey[600],
                   height: 1.3,
                 ),
                 maxLines: 2,
@@ -264,23 +264,23 @@ class _GroupCardState extends ConsumerState<GroupCard> {
                   widget.group.memberCountText,
                   style: TextStyle(
                     fontSize: 12,
-                    color: SojornColors.textTertiary,
+                    color: Colors.grey[500],
                     fontWeight: FontWeight.w500,
                   ),
                 ),
-                const Text(' • ', style: TextStyle(fontSize: 12, color: SojornColors.textTertiary)),
+                const Text(' • ', style: TextStyle(fontSize: 12, color: Colors.grey[500])),
                 Text(
                   widget.group.postCountText,
                   style: TextStyle(
                     fontSize: 12,
-                    color: SojornColors.textTertiary,
+                    color: Colors.grey[500],
                     fontWeight: FontWeight.w500,
                   ),
                 ),
               ],
             ),
             
-            if (showReason && reason != null) ...[
+            if (widget.showReason && widget.reason != null) ...[
               const SizedBox(height: 8),
               Container(
                 padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
@@ -289,7 +289,7 @@ class _GroupCardState extends ConsumerState<GroupCard> {
                   borderRadius: BorderRadius.circular(8),
                 ),
                 child: Text(
-                  reason!,
+                  widget.reason!,
                   style: TextStyle(
                     fontSize: 11,
                     color: Colors.blue[700],
@@ -390,12 +390,12 @@ class CompactGroupCard extends StatelessWidget {
                   group.memberCountText,
                   style: TextStyle(
                     fontSize: 11,
-                    color: SojornColors.textTertiary,
+                    color: Colors.grey[500],
                   ),
                 ),
               ],
             ),
-            if (showReason && reason != null) ...[
+            if (widget.showReason && widget.reason != null) ...[
               const SizedBox(height: 6),
               Container(
                 padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 2),
@@ -404,7 +404,7 @@ class CompactGroupCard extends StatelessWidget {
                   borderRadius: BorderRadius.circular(6),
                 ),
                 child: Text(
-                  reason!,
+                  widget.reason!,
                   style: TextStyle(
                     fontSize: 9,
                     color: Colors.blue[700],

sojorn_app/lib/widgets/group_creation_modal.dart

@@ -47,7 +47,7 @@ class _GroupCreationModalState extends ConsumerState<GroupCreationModal> {
         name: _nameController.text.trim(),
         description: _descriptionController.text.trim(),
         category: _selectedCategory,
-        isPrivate: _isPrivate,
+        is_private: _isPrivate,
         avatarUrl: _avatarUrl,
         bannerUrl: _bannerUrl,
       );

sojorn_app/pubspec.lock

@@ -361,6 +361,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.4.1"
+  equatable:
+    dependency: "direct main"
+    description:
+      name: equatable
+      sha256: "3e0141505477fd8ad55d6eb4e7776d3fe8430be8e497ccb1521370c3f21a3e2b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.8"
   fake_async:
     dependency: transitive
     description:

sojorn_app/pubspec.yaml

@@ -82,6 +82,7 @@ dependencies:
   intl: 0.19.0
   web_socket_channel: ^3.0.3
   device_info_plus: ^12.3.0
+  equatable: ^2.0.8
 
 dev_dependencies:
   flutter_test: