Chat view in broken state if I log out (fix microsoft/vscode-copilot#10300) (microsoft#234086)

Author: bpasero

src/vs/workbench/contrib/chat/browser/viewsWelcome/chatViewWelcomeController.ts

@@ -57,14 +57,15 @@ export class ChatViewWelcomeController extends Disposable {
 			return;
 		}
 
+		this.enabled = enabled;
 		this.enabledDisposables.clear();
+
 		if (!enabled) {
 			this.container.classList.toggle('chat-view-welcome-visible', false);
 			this.renderDisposables.clear();
 			return;
 		}
 
-		this.enabled = true;
 		const descriptors = chatViewsWelcomeRegistry.get();
 		if (descriptors.length) {
 			this.render(descriptors);

src/vs/workbench/contrib/chat/common/chatServiceImpl.ts

@@ -952,7 +952,7 @@ export class ChatService extends Disposable implements IChatService {
 	}
 
 	public hasSessions(): boolean {
-		return !!Object.values(this._persistedSessions);
+		return Object.values(this._persistedSessions).length > 0;
 	}
 
 	transferChatSession(transferredSessionData: IChatTransferredSessionData, toWorkspace: URI): void {