Adds export (GET /api/items/export) and import (POST /api/items/import) routes
backed by a pure csv.service with no external deps, plus useExportItems/useImportItems
hooks and an Import/Export section in the Settings page.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Redesign WeightSummaryCard stats from a disconnected 4-column grid to a
compact legend-style list with color dots, percentages, and a divider
before the total row. Switch chart and legend colors to a neutral gray
palette.
Add a currency selector to settings (USD, EUR, GBP, JPY, CAD, AUD) that
changes the displayed symbol across the app. This is visual only — no
value conversion is performed.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
