- Add TemplatePickerSheet StatefulWidget with checklist UI for task templates
- Add showTemplatePickerSheet helper for modal display with DraggableScrollableSheet
- Add 4 German localization keys: templatePickerTitle, Skip, Add, Selected count
- All templates unchecked by default, confirm button only enabled with selection
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Create TaskTemplate class with name, intervalType, intervalDays, effortLevel
- Add roomTemplates const map with 3-6 templates per room type (14 total)
- Implement detectRoomType with case-insensitive matching and alias support
- Room types: kueche, badezimmer, schlafzimmer, wohnzimmer, flur, buero,
garage, balkon, waschkueche, keller, kinderzimmer, gaestezimmer, esszimmer, garten
- All 11 template tests passing
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
