Desktop macOS white screen from WebKit crash on theme attribute mutation

[y9y9work-jpg]

Description

On macOS, OpenCode desktop can open to a white screen while the sidecar is healthy. Crash reports show com.apple.WebKit.WebContent crashing in WebCore::SelectorChecker::attributeSelectorMatches during setAttribute handling.

Plugins

None

OpenCode version

1.2.16

Steps to reproduce

1. Launch OpenCode desktop on macOS with existing persisted theme/workspace state.
2. Observe intermittent/recurring white screen with no UI rendered.
3. Check ~/Library/Logs/DiagnosticReports and see com.apple.WebKit.WebContent crash reports tied to ai.opencode.desktop.

Screenshot and/or share link

N/A (white screen + crash logs)

Operating System

macOS 14.5

Terminal

N/A (desktop app)

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• OpenCode desktop version black screen issue #15799: Similar macOS desktop black/white screen on restart
• macOS Desktop: Session Diff causes permanent blank screen until storage/session_diff is deleted #15683: macOS Desktop blank screen (different trigger — Session Diff corruption — but similar symptom of sidecar healthy while UI is blank)

If your issue is distinct from these (e.g., the WebKit crash in WebCore::SelectorChecker::attributeSelectorMatches is a specific root cause not covered there), please clarify the difference so maintainers can track it separately.