Rebuild ambient verification page around working auto-verify model

[GsCommand]

Motivation

• Make public/ambient-verification.html an implementation-focused automatic verification page that demonstrates a working flow (runtime signs → delivered → verifier validates → accept/reject) and link to the webhook auto-verify example.
• Replace conceptual language and stale checklist items with the canonical proof model and precise verification terminology so visitors can understand how to automate receipt verification.

Description

• Rewrote public/ambient-verification.html to use the canonical top navigation with the Docs dropdown (Docs marked active), updated the hero copy and CTAs to point to /webhook-auto-verify.html and the GitHub example, and preserved the site visual direction.
• Added a clear "The working model" flow, a "Webhook auto-verification" how-to block (with the examples/webhook-auto-verify run and curl examples), an updated "Trust checks" list aligned to metadata.proof / json.sorted_keys.v1 / SHA-256 / Ed25519 / vC4WbcNoq2znSCiQ / runtime.commandlayer.eth, a "Trust boundaries" section, a labeled "Verification URLs" demo section, and an explicit "Live vs planned" separation.
• Removed prior stale checklist items and wording that conflated schema-valid with cryptographic verification, and kept the grouped footer layout (Product / Developers / Proof).
• Change set limited to the single file public/ambient-verification.html and contains only content/markup updates (no API routes, schemas, or file deletions were modified).

Testing

• Ran npm install which completed successfully.
• Ran npm test which executed the repo tests and reported 17 tests run with 15 passing and 2 failing due to a missing test fixture file examples/sample-receipt.json required by existing tests (tests failed as a result of the missing file rather than the page changes).
• Attempted npm run build which failed because no build script is defined in package.json in this repository.

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Codex Task

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Project	Deployment	Actions	Updated (UTC)
commandlayer-commandlayer-org	Ready	Preview, Comment	May 21, 2026 8:51pm
commandlayer-org	Ready	Preview, Comment	May 21, 2026 8:51pm
commandlayer-org111	Ready	Preview, Comment	May 21, 2026 8:51pm