update Mzansi AI Thoughts window

Frontend/lib/mih_packages/mzansi_ai/package_tools/ai_chat.dart

@@ -236,10 +236,9 @@ class _AiChatState extends State<AiChat> {
               Navigator.of(context).pop();
             },
             windowBody: Column(
+              mainAxisSize: MainAxisSize.max,
               children: [
                 Stack(
-                  children: [
-                    Column(
                   children: [
                     Text(
                       snapshot.requireData,
@@ -252,8 +251,6 @@ class _AiChatState extends State<AiChat> {
                         fontWeight: FontWeight.bold,
                       ),
                     ),
-                      ],
-                    ),
                     Positioned(
                       bottom: 0,
                       right: 0,
@@ -657,7 +654,7 @@ class _AiChatState extends State<AiChat> {
     );
     _modelController.text = 'gemma3:4b';
     _fontSizeController.text = _chatFrontSize.ceil().toString();
-    systemPromt = setSystemPromt();
+
     _chatHistory.add(
       ollama.Message(
         role: ollama.MessageRole.system,