[bug] High CPU when image in clipboard

[enormouspoon]

Describe the bug
RustCast seems to CPU spike when images are in the clipboard. CPU spike stays until clipboard is cleared.

To Reproduce

1. Have RustCast running in the background
2. Copy a picture to the clipboard, e.g., from file, preview, screenshot tool, etc
3. View CPU spike in Activity Monitor

Expected behavior
RustCask to not spike CPU usage based on clipboard

Screenshots

Which macos version? (please complete the following information):

• MBP M3 Pro
• MacOS Tahoe 26.5.1
• RustCast 0.7.9
• RustCast installed via homebrew

Additional context

• Potentially related to issue High energy usage #169
• I've noticed the CPU spikes correlate to image size: less for smaller images, higher for larger images.

[unsecretised]

Yea. This would be fixed once #233 gets added.

Until then I'll keep this open cos this is a separate issue that has the same fix.