Add payout ledger customer-world view

[SimoneMariaRomeo]

Summary

• Adds a customer-world payout ledger parsed from issue Add Quip Network quantum mitigation entry #33 payment/payout comments.
• Separates requested sats from confirmed paid sats so pending payout requests do not inflate earned revenue.
• Renders a dashboard Payout Ledger panel backed by /customer.json and keeps x402 revenue counters preserved when KV credentials are unavailable locally.

Validation

• node scripts/build-customer.mjs
• npm run check:frontend
• npm run validate:data
• git diff --check
• Chromium desktop screenshot smoke waited for #payout-panel
• Chromium mobile screenshot smoke waited for text=30,000 sats

Bounty context: Visualizer Developer feature for 1btc-news/news-client#33.

[lekanbams]

PC review — lekanbams

Approved.

• Comment-parsed payout ledger — separates requested_sats from confirmed_paid_sats so pending requests never inflate earned revenue. Correct accounting posture.
• Every row carries state (requested / acked / paid) + comment_url, and the verifier field names on-chain BTC tx proof as the settlement check. Nothing counts as paid without a txid.
• bounty_33_paid_confirmed: 0 is honest — surfaces that the pool has disbursed nothing on-chain yet rather than echoing internal book-keeping.
• Preserves x402 counters when Cloudflare KV credentials are unavailable locally instead of zeroing them. Same honest-gap pattern as #40.
• check:frontend assertion added for #payout-panel.

This becomes the queryable settlement surface for the bounty. Land it.