docs: rewrite AlgorandClient concepts page

1. NFD username not visible at real production code.
2. Duplicate account selections in EscrowSessionVaultDebugToolScreen.

The agent tab wears her face, the website wears the V — both cropped from
out/brand and shipped as png + ico. Next serves app/icon.png and
app/favicon.ico by convention; the Astro layout links its pair explicitly.

Two stacked errors. Vestige's /protocols has no denominating param and
reports tvl in ALGO; get_defi_overview relabeled it USD unchecked. And its
liquid-staking rows count both the backing ALGO and the minted derivative
(xALGO showed 553M against a real ~280M ALGO — exactly 2x).

The handler now converts with Vestige's own ALGO/USD price and keeps type-0
(DEX) rows only, refusing outright when the price is unavailable rather
than reporting zeros. Cards say 'locked in dex pools' since that is what
the number is now. Live cross-check: $714.99M became $6.35M, with Tinyman
2.0 at $4.95M against DefiLlama's ~$5.4M.

A client island builds a local result store from the payload's records and
renders them through ResultCard — the same switch the feed uses, with no
handlers, so drill-ins and pagination simply are not there. A record that
does not fit its view still falls to RawCard. Nothing enters the visitor's
session or the model; safeHref gates every record-derived URL. The Satori
poster keeps the flat derivation — Satori cannot render client components.