chat history maintained

lib/ui/chatbot/chatbot_screen.dart

@@ -1,5 +1,6 @@
 import 'package:easy_localization/easy_localization.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter_local_notifications/flutter_local_notifications.dart';
 import 'package:flutter_svg/svg.dart';
 import 'package:mohem_flutter_app/api/dashboard_api_client.dart';
 import 'package:mohem_flutter_app/app_state/app_state.dart';
@@ -11,6 +12,11 @@ import 'package:mohem_flutter_app/models/generic_response_model.dart';
 import 'package:speech_to_text/speech_recognition_result.dart';
 import 'package:speech_to_text/speech_to_text.dart';
 
+
+class MessagesHolder{
+  static List<ChatMessage> messages = [];
+}
+
 enum ChatMode { home, chatActive }
 
 class ChatMessage {
@@ -51,6 +57,13 @@ class _ChatBotScreenState extends State<ChatBotScreen> {
   /// Initialize speech to text
   void _initSpeech() async {
     _speechEnabled = await _speechToText.initialize();
+
+    if(MessagesHolder.messages.isNotEmpty){
+      setState(() {
+        _messages.addAll(MessagesHolder.messages);
+        _currentMode = ChatMode.chatActive;
+      });
+    }
     setState(() {});
   }
 
@@ -159,9 +172,26 @@ class _ChatBotScreenState extends State<ChatBotScreen> {
     return Scaffold(
       backgroundColor: MyColors.backgroundColor,
       appBar: AppBar(
+       automaticallyImplyLeading: false,
         title: Text(LocaleKeys.chatBot.tr(), style: const TextStyle(fontSize: 24, fontWeight: FontWeight.w700, color: Color(0xFF2B353E))),
         backgroundColor: MyColors.backgroundColor,
         centerTitle: false,
+        actions: [
+          IconButton(
+            icon: const Icon(Icons.minimize, color: Color(0xFF2B353E)),
+            onPressed: () {
+              MessagesHolder.messages = _messages;
+              Navigator.of(context).pop();
+            },
+          ),
+          IconButton(
+            icon: const Icon(Icons.close, color: Color(0xFF2B353E)),
+            onPressed: () {
+              MessagesHolder.messages.clear();
+              Navigator.of(context).pop();
+            },
+          ),
+        ],
       ),
       body: Column(children: <Widget>[Expanded(child: _currentMode == ChatMode.home ? _buildHomeMode() : _buildChatMode()), _buildBottomInputBar()]),
     );
@@ -464,3 +494,6 @@ class _AnimatedMessageBubbleState extends State<AnimatedMessageBubble> with Sing
     );
   }
 }
+
+
+