fix: clarify project registration controls

SovereignAI-Starter/flutter_app/lib/features/chat/presentation/pages/chat_page.dart

@@ -1097,7 +1097,7 @@ class _ChatPageState extends State<ChatPage> {
                 ),
               ),
               IconButton(
-                tooltip: 'تسجيل مشروع جديد',
+                tooltip: 'إضافة مشروع موجود إلى القائمة',
                 visualDensity: VisualDensity.compact,
                 onPressed: chat.isSending ? null : _addWorkspaceProject,
                 icon: const Icon(Icons.create_new_folder_outlined, size: 19),
@@ -1108,7 +1108,7 @@ class _ChatPageState extends State<ChatPage> {
             TextButton.icon(
               onPressed: chat.isSending ? null : _addWorkspaceProject,
               icon: const Icon(Icons.add, size: 16),
-              label: const Text('تسجيل مشروع جديد'),
+              label: const Text('إضافة مجلد مشروع موجود'),
               style: TextButton.styleFrom(
                 alignment: Alignment.centerRight,
                 padding: const EdgeInsets.symmetric(horizontal: 4, vertical: 6),
@@ -1407,11 +1407,18 @@ class _ChatPageState extends State<ChatPage> {
               ),
             ),
             SizedBox(width: compact ? 2 : 12),
-            IconButton.filledTonal(
-              onPressed: chat.isSending ? null : _addWorkspaceProject,
-              tooltip: 'تسجيل مشروع من مجلد موجود',
-              icon: const Icon(Icons.create_new_folder_outlined),
-            ),
+            if (constraints.maxWidth >= 900)
+              FilledButton.tonalIcon(
+                onPressed: chat.isSending ? null : _addWorkspaceProject,
+                icon: const Icon(Icons.create_new_folder_outlined),
+                label: const Text('إضافة مجلد مشروع'),
+              )
+            else
+              IconButton.filledTonal(
+                onPressed: chat.isSending ? null : _addWorkspaceProject,
+                tooltip: 'إضافة مجلد مشروع موجود',
+                icon: const Icon(Icons.create_new_folder_outlined),
+              ),
             IconButton(
               onPressed: _chooseWorkspace,
               tooltip: