[PatchAgent] Set focus when returning from permissions dialog

Bug: 406071340
Change-Id: I99d6dd715c3f85ce9629b975b19f892aca5556c8
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6470014
Auto-Submit: Wolfgang Beyer <wolfi@chromium.org>
Reviewed-by: Nikolay Vitkov <nvitkov@chromium.org>
Commit-Queue: Nikolay Vitkov <nvitkov@chromium.org>

Author: wolfib

front_end/panels/ai_assistance/SelectWorkspaceDialog.ts

@@ -238,14 +238,19 @@ export class SelectWorkspaceDialog extends UI.Widget.VBox {
         this.#dialog.hide();
       },
       onAddFolderButtonClick: () => {
-        void Persistence.IsolatedFileSystemManager.IsolatedFileSystemManager.instance().addFileSystem();
+        void this.#addFileSystem();
       },
       onListItemKeyDown: this.#onListItemKeyDown.bind(this),
     };
 
     this.#view(viewInput, undefined, this.contentElement);
   }
 
+  async #addFileSystem(): Promise<void> {
+    await Persistence.IsolatedFileSystemManager.IsolatedFileSystemManager.instance().addFileSystem();
+    this.contentElement?.querySelector('[aria-label="Select"]')?.shadowRoot?.querySelector('button')?.focus();
+  }
+
   async #connectToAutomaticFilesystem(): Promise<void> {
     const success = await this.#automaticFileSystemManager.connectAutomaticFileSystem(/* addIfMissing= */ true);
     // In the success-case, we will receive a 'ProjectAdded' event and handle it in '#onProjectAdded'.