test: add test for all dashbot pages

test/dashbot/pages/test_utils.dart

@@ -0,0 +1,51 @@
+import 'package:apidash/dashbot/features/chat/models/chat_message.dart';
+import 'package:apidash/dashbot/features/chat/viewmodel/chat_viewmodel.dart';
+import 'package:apidash/dashbot/features/chat/models/chat_state.dart';
+import 'package:apidash/dashbot/core/constants/constants.dart';
+import 'package:flutter/material.dart';
+
+class SpyChatViewmodel extends ChatViewmodel {
+  SpyChatViewmodel(super.ref);
+
+  final List<({String text, ChatMessageType type, bool countAsUser})>
+      sendMessageCalls = [];
+
+  bool clearCalled = false;
+  List<ChatMessage> _messages = const [];
+
+  void setMessages(List<ChatMessage> messages) {
+    _messages = messages;
+    state = state.copyWith(chatSessions: {'global': messages});
+  }
+
+  void setState(ChatState newState) {
+    state = newState;
+  }
+
+  @override
+  List<ChatMessage> get currentMessages => _messages;
+
+  @override
+  Future<void> sendMessage({
+    required String text,
+    ChatMessageType type = ChatMessageType.general,
+    bool countAsUser = true,
+  }) async {
+    sendMessageCalls.add((text: text, type: type, countAsUser: countAsUser));
+  }
+
+  @override
+  void clearCurrentChat() {
+    clearCalled = true;
+  }
+}
+
+class RecordingNavigatorObserver extends NavigatorObserver {
+  Route<dynamic>? lastRoute;
+
+  @override
+  void didPush(Route<dynamic> route, Route<dynamic>? previousRoute) {
+    super.didPush(route, previousRoute);
+    lastRoute = route;
+  }
+}