[Regression] Thinking blocks no longer expand on click in VSCode extension (v2.1.160)

Describe the bug

In the Claude Code VSCode extension, thinking blocks used to have a clickable arrow/affordance: clicking a thinking block expanded it to show the reasoning, and clicking again collapsed it. As of v2.1.160 this no longer works — clicking the thinking block does nothing, and there is no visible expand arrow. The reasoning can no longer be opened with the mouse.

This worked in the version immediately prior to 2.1.160, so it appears to be a regression introduced in that release.

To Reproduce

1. Use the Claude Code VSCode extension (v2.1.160) on Windows 11.
2. Send a prompt that produces a thinking block.
3. Try to click the collapsed thinking block to expand it.
4. Nothing happens — the block does not expand.

Expected behavior

Clicking a thinking block (or its expand arrow) should expand it to show the full reasoning, and clicking again should collapse it — as it did before v2.1.160.

Workaround that does NOT help

• Ctrl+O (toggle verbose) is intercepted by VSCode (Open File) and never reaches the extension.
• ~/.claude/keybindings.json rebinds do not apply to the VSCode extension (CLI-only).

So there is currently no way to expand thinking blocks in the extension via mouse or keyboard.

Environment

• Claude Code VSCode extension: v2.1.160 (anthropic.claude-code-2.1.160-win32-x64)
• OS: Windows 11
• Model: Opus 4.8

Request

Restore the click-to-expand behavior (clickable arrow/chevron) for thinking blocks in the VSCode extension.