- Puzzle panel now shifts canvas and waveform viewer right (340px) instead of
overlapping them, using body class toggle and CSS transitions
- Canvas resize accounts for sidebar width
- Progress (completed/unlocked levels, custom components) persists in localStorage
- Level cards refresh on each panel open to reflect current progress
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add progressive puzzle mode alongside the existing sandbox:
- 8 levels from basic gates to 2-bit adder
- Truth table verification with pass/fail feedback
- Gate restrictions per level
- Custom components system (save circuits as reusable chips)
- Save/load circuits as JSON
- Level selection sidebar with difficulty ratings
- Mode toggle: Sandbox (free play) vs Puzzle (guided levels)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
