Fix v42 Alpha-Agent identity console state coherence and register fallback

[MontrealAI]

Motivation

• Repair the broken Alpha-Agent Free Trial & Identity Console in the v42 standalone artifact so preview/read gating, recommendations, and the primary register(label) path are coherent and contract-faithful.
• Prevent stale async reads and mixed partial state from showing contradictory UI (e.g., “Loading preview” while buttons are enabled) by introducing a single-source snapshot and freshness token.
• Replace semantically incorrect copy that implied preview(label) was authoritative and provide a clear, review-first expert fallback when preview telemetry fails but root health is usable.

Description

• Implemented a request-token freshness model with requestSeq/activeRequestId, nextIdentityRequestId(), isCurrentIdentityRequest() and buildIdentitySnapshot() to keep a single identity snapshot per chain/contract/label/wallet/request.
• Reworked the identity UI state derivation in deriveAlphaIdentityUiState() to deterministically map preview.status to recommendations and to prevent contradictory loading/enablement combinations, and added canExpertFallback logic for a guarded fallback path.
• Hardened refreshIdentityState() to record previewError and to ignore stale async responses, and improved hydration text for token fields so missing data is explained (e.g., Not issued yet, preview unavailable).
• Removed the misleading copy Authoritative identity preview and replaced it with Live preview(label) decision card, while keeping the primary write route direct and contract-faithful (FreeTrialSubdomainRegistrarIdentity.register(string) at 0x7811993CbcCa3b8bb35a3d919F3BA59eeFbeAA9a with 0 ETH).
• Files changed: ui/agijobmanager_genesis_job_mainnet_2026-03-05-v42.html, ui/tests/standaloneV42.test.ts.

Testing

• Ran npx vitest run tests/standaloneV42.test.ts and the updated standalone v42 tests passed (5 tests, all green).
• An initial npm test -- --run ui/tests/standaloneV42.test.ts invocation failed due to the repository Vitest include filter (no test files matched that CLI glob), but the explicit npx vitest run validated the new assertions successfully.
• The updated tests check: presence of Live preview(label) decision card copy, removal of Authoritative identity preview, presence of stale-request guards (buildIdentitySnapshot / isCurrentIdentityRequest), and preview-fallback messaging.

---

Codex Task