[Bug] Thinking section text truncated without horizontal scroll in UI

Bug Description
Thinking section text cuts off without horizontal scrolling in upgraded Claude code UI

Environment Info

• Platform: darwin
• Terminal: vscode
• Version: 2.1.47
• Feedback ID: 0043a69c-15ac-4321-93e0-4e02c07ebcc6

Errors

[{"error":"Error: 1: Command failed with ERR_STREAM_PREMATURE_CLOSE: code --force --install-extension anthropic.claude-code\nPremature close \n    at vV7 (/$bunfs/root/claude:1901:4106)\n    at async SV7 (/$bunfs/root/claude:1901:1623)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-18T12:40:29.743Z"}]