fix(core): chat history not show in independent page (#13069)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
* Added the ability to reload the current AI chat session, clearing and
reinitializing the chat context.
* Introduced a function to close the chat history menu in the AI chat
toolbar.
* Enabled seamless opening of specific chat sessions from the chat
toolbar, with improved loading state handling and error feedback.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/core/src/blocksuite/ai/components/ai-chat-content/ai-chat-content.ts

@@ -308,6 +308,11 @@ export class AIChatContent extends SignalWatcher(
     this.closePreviewPanel(true);
   }
 
+  public reloadSession() {
+    this.reset();
+    this.initChatContent().catch(console.error);
+  }
+
   public openPreviewPanel(content?: TemplateResult<1>) {
     this.showPreviewPanel = true;
     if (content) this.previewPanelContent = content;

packages/frontend/core/src/blocksuite/ai/components/ai-chat-toolbar/ai-chat-toolbar.ts

@@ -186,4 +186,8 @@ export class AIChatToolbar extends WithDisposable(ShadowlessElement) {
       closeOnClickAway: true,
     });
   };
+
+  public closeHistoryMenu() {
+    this.abortController?.abort();
+  }
 }