## Summary

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## What Changed

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## Visual QA

Please attach screenshots for visual changes.

- [ ] Checked at least one dense text slide
- [ ] Checked at least one image slide
- [ ] Checked navigation / ESC overview / low-power mode when relevant

## Validation

- [ ] `node scripts/validate-swiss-deck.mjs path/to/index.html`
- [ ] Manual browser review

## Notes

Any tradeoffs, limitations, or follow-up work:
