no thinking dropdown for single tool calls

[justschen]

fix #284810

[Copilot]

Pull request overview

This PR fixes issue #284810 by removing the thinking dropdown UI when there's only a single tool invocation with no thinking content. Instead of displaying a collapsible thinking section containing one tool, the tool is shown directly in its original position.

Key Changes

• Modified the logic to track and restore single tool invocations to their original DOM positions
• Removed the currentToolCallLabel field which was previously used to set the thinking dropdown's title for single tools
• Added restoration logic that moves the tool element out of the thinking container and hides the dropdown when appropriate

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
chatListRenderer.ts	Passes templateData.value as the originalParent parameter to appendItem calls, enabling the thinking part to restore tools to their original container
chatThinkingContentPart.ts	Implements single-tool restoration by tracking the tool element's original position and moving it back when the thinking dropdown would only contain one tool without thinking text