Dashboard: list requests for the connected account

[iexwr]

Context

src/pages/Dashboard.tsx is a placeholder; users need to see their own requests and totals.

Acceptance criteria

• When wallet connected, fetch /accounts/:address/requests and /accounts/:address/received.
• Render a table: id, asset, amount, memo, status (badge), link to /request/:id.
• Show total received prominently.
• Handle empty / not-connected states with a clear CTA.

Technical notes

• Use TanStack Query (useQuery) for caching/refetch.

Testing

• Component test with mocked API returning a few requests.