Michael Czechowski 1f7f7bb027 feat: improve playground UX and fix undo/redo across lessons ...

- Add dice SVG icon for random template button
- Reset button now restores last loaded template in playground
- Clear editor history when switching lessons (prevents cross-lesson undo)
- Add playground link to goodbye lesson
- Center icon buttons with flexbox

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2026-01-16 02:28:12 +01:00

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