Fullscreen mouse capture: Ctrl+click on a URL in Windows Terminal opens it twice

With fullscreen rendering and mouse capture enabled (default settings, no CLAUDE_CODE_DISABLE_MOUSE* env vars), Ctrl+clicking a URL in the transcript opens two browser tabs.

Environment

• Claude Code: 2.1.235 (autoUpdatesChannel: latest)
• Terminal: Windows Terminal 1.24.11911.0, PowerShell 7
• OS: Windows 11 Pro (build 26200)

Steps to reproduce

1. Start Claude Code in Windows Terminal with default fullscreen/mouse-capture settings.
2. Have the assistant print any URL.
3. Ctrl+click the URL once.

Expected: the URL opens once.
Actual: two identical browser tabs open.

Notes

• This looks different from #68568 (JetBrains reworked terminal delivering duplicate click events): here the likely cause is that Windows Terminal's own native Ctrl+click hyperlink handling fires in addition to Claude Code's in-app link opening. Claude Code reportedly defers to the terminal's link handler on xterm.js-based terminals (VS Code/Cursor) to avoid exactly this — Windows Terminal isn't xterm.js-based, so no deferral happens.
• With CLAUDE_CODE_DISABLE_MOUSE=1 the double-open disappears (only the terminal handles the click), but that also disables drag-select/auto-copy and wheel scrolling.
• Related: #71826, #72681 (mouse-capture friction reports).