[BUG] Desktop app UI freezes on permission prompt — Windows, requires force close

• [x] Searched existing issues
• [x] Single bug report
• [x] Latest version

Bug

Claude Desktop (Code tab) freezes completely when a tool permission prompt appears. UI renders but accepts no input — keyboard and mouse both dead. Only recovery is killing the process.

Affects 2 users in our office. CLI works fine on the same machines.

Repro

1. Open Claude Desktop on Windows 11
2. Trigger any tool permission prompt
3. UI locks

More consistent at smaller window sizes, but also occurs maximised.

Environment

• Windows 11, latest Claude Desktop
• 100% display scaling
• Tested on ultrawide (3440×1440) and laptop displays — freezes on both
• Multi-monitor extended setup

Ruled Out

• ELECTRON_DISABLE_GPU=1 — no effect
• Disabling Windows notifications — no effect (this fixed identical Electron freezes we had with Cursor and Slack)
• Maximising window — reduces frequency, doesn't eliminate
• Display scaling / app zoom — both at defaults

Key Signal

• CLI handles the same permission prompts fine — bug is in the Electron rendering layer, not permission logic
• Same office, same Electron freeze pattern in Cursor and Slack — those were fixed by disabling notifications. Claude's permission dialog triggers the same bug through a different path, so that workaround doesn't apply
• Possibly related: electron/electron#10182, electron/electron#7401