- Speed up spinner animation from 100ms to 50ms for smoother visuals
- Fix spinner flicker by deferring stop until output is ready
- Remove unnecessary 'Preparing...' spinner at section start
- Hide whitelist-protected items from output (Trash, Finder metadata)
- Add spinner feedback for system diagnostic log cleanup
- Remove redundant stop_section_spinner calls in cleanup modules
The cleanup process now feels significantly faster and more polished,
with continuous visual feedback and no jarring gaps between operations.
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