- Fix NavListDetail duplicate-GlobalKey crash for a lone detail on a wide screen
- Make NavEntryDecorator.onRemoved symmetric across the NavListDetail breakpoint
- MultiNavStack.handleBack consumes back even when a popGuard vetoes the pop
- Refuse an empty stack in release instead of crashing the Navigator
- Add tabs.dart (per-tab history) and results.dart (pushForResult) examples
- README: table of contents, runnable snippets, and accuracy fixes