Desktop app freezes when opening right sidebar panel

Description

Every time I open the right sidebar panel (file explorer / search panel), the entire application freezes for several seconds. The sidebar shows a loading spinner while the main conversation area becomes unresponsive.

Steps to reproduce

1. Open Claude Code desktop app (Windows)
2. Have multiple worktrees in the left sidebar
3. Click the sidebar toggle button (top-right) to open the right panel
4. Observe: the entire app freezes/stutters until the panel finishes loading

Expected behavior

The sidebar should open without blocking the main UI thread.

Actual behavior

The app becomes unresponsive for several seconds. The right panel shows a loading spinner, and the conversation area cannot be scrolled or interacted with during this time.

Environment

• Platform: Windows 11 Pro (10.0.26200)
• App: Claude Code Desktop (Orca)
• Worktrees: 3 repos with multiple worktrees active
• Repo contents: HTML files (1000+ lines each), markdown files

Screenshot

The red-bordered area is the right sidebar panel that triggers the freeze:

!sidebar-freeze

(Right panel open with loading spinner, app unresponsive)