Added multi-currency support, account/budget management, and settings

- Primary account determines app-wide reference currency; all totals, charts, and summaries convert to it automatically using live rates

- Transactions show both converted and original amounts for cross-currency accounts; IsMultiCurrency recalculates on primary currency change

- Exchange rates fetched live on account save and broadcast via RatesRefreshed so all views update without a restart

- Account create/edit/delete with currency, icon, color, and primary toggle

- Budget create/edit/delete; savings goal dialog

- Settings view: display name, avatar upload, theme, language

- Removed currency selector from Settings (follows primary account)

- Fixed account list sort: primary first, then oldest CreatedAt, per group

- Fixed total balance overlap in dashboard accounts card

Clario/Assets/Icons/archive.svg

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