fix: Safari clipboard sync in dashboard live view

[ehfeng]

Summary

• Safari only permits clipboard API reads during user-initiated events (click, keydown, paste)
• The Guacamole keyboard handler was calling preventDefault() on all keydown events, preventing the browser from ever firing a paste event on Cmd+V
• Fix: return true from the Guacamole onkeydown callback for Ctrl/Cmd+V, allowing the browser to fire the paste event naturally, which triggers the existing onPaste → syncClipboard codepath
• The keydown for v is still sent to the remote session before allowing through, so remote paste behavior is unaffected

Test plan

• Open a live view session in Safari on macOS
• Copy text on local machine, Cmd+V in live view — verify clipboard syncs to remote
• Verify Chrome/Firefox clipboard sync still works as before
• Verify other key combinations (Ctrl+C, Ctrl+A, etc.) are still intercepted by Guacamole and not passed through to the browser

🤖 Generated with Claude Code

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Note

Low Risk
Low risk, localized change to keyboard event handling to stop suppressing the browser paste event for Ctrl/Cmd+V; potential impact is limited to shortcut interception behavior in the live view overlay.

Overview
Fixes Safari clipboard sync in live view by adjusting the Guacamole keyboard onkeydown handler to not suppress Ctrl/Cmd+V. The keydown is still forwarded to the remote session, but returning true for that combo allows the browser to emit a native paste event, triggering the existing onPaste → syncClipboard path.

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