Full period tracking system for the fitness measure page:
- Period logging with start/end dates, edit/delete support
- EMA-based cycle and period length predictions (α=0.3, 12 future cycles)
- Calendar view with connected range strips, overflow days, today marker
- Fertility window, peak fertility, ovulation, and luteal phase visualization
- Period sharing between users with profile picture avatars
- Cycle/period stats with 95% CI below calendar
- Redesigned profile card as inline header metadata with Venus/Mars icons
- Collapsible weight and period history sections
- Full DE/EN i18n support
Replace hardcoded Nord colors with semantic CSS variables across all cospend
pages and shared components (FormSection, ImageUpload, SplitMethodSelector,
UsersList, PaymentModal, BarChart). Remove all dark mode override blocks.
Make BarChart font colors theme-reactive via isDark() + MutationObserver.
Extract reusable SaveFab component and use it on recipe edit and all cospend
edit/add pages. Remove Cancel buttons and back links in favor of browser
navigation. Replace raw checkboxes with Toggle component.
Move fitness measurement add/edit forms to separate routes with SaveFab.
Collapse profile section (sex/height) by default on the measure page.
Document theming rules in CLAUDE.md for future reference.
Complete household task management system behind task_users auth group:
- Task CRUD with recurring schedules, assignees, tags, and optional difficulty
- Blobcat SVG sticker rewards on completion, rarity weighted by difficulty
- Sticker collection page with calendar view and progress tracking
- Redesigned cards with left accent urgency strip, assignee PFP, round check button
- Weekday-based due date labels for tasks within 7 days
- Tasks link added to homepage LinksGrid
