- Added QuickAddItem interface and quickAdd namespace to api.ts
- Created useQuickAdd hook with CRUD operations following useTemplate pattern
- Created QuickAddPage with amber/orange gradient header, add form, inline edit, and EmptyState
- Added /quick-add route to App.tsx with QuickAddPage import
- Added Zap nav item to AppLayout sidebar after template
- Added quickAdd i18n keys to en.json and de.json including picker keys
- Create TemplatePage with add form (category/tier/amount), items table, and empty state
- Add /template route to App.tsx with TemplatePage component
- Add Template nav item to sidebar (between Categories and Settings)
- Add template and nav.template i18n keys for EN and DE
- Fix unused import in useTemplate hook
- Add ItemTier type and TemplateItem/TemplateDetail interfaces to api.ts
- Add item_tier field to BudgetItem interface
- Add template API object with get/updateName/addItem/updateItem/deleteItem/reorder
- Add generate function to budgets API object
- Create useTemplate hook with CRUD operations and reorder logic
