feat(console): connect named Go subscribers

[vaprdev]

Summary

• use https://opencode.ai/console as the default V2 Console server
• resolve device verification paths against the server origin without duplicating /console
• connect exactly one organization and fail clearly for zero or multiple organizations instead of binding the wrong org
• keep login pending until persisted credentials load real Console provider config and catalog models
• restore prior credentials when replacement login readiness fails
• document the real opencode2 console login named-human flow with no copied API key
• remove retired /zen/go, opencode-go/*, /connect, and any-agent claims while preserving localized Go pages

Boundary

Go remains a named-human OpenCode subscription. Service-account Go entitlement, external-agent support, and multi-org selection are explicitly deferred. Service-account keys continue to support ordinary managed inference.

Stack

• Base: public CTA draft fix(console): route Go links to Console #40299
• Do not merge until the Console Go stack is deployed enabled and smoke-verified

Proof

• core provider/login tests: 29 passed
• CLI focused tests: 7 passed
• repository push-hook typecheck: 33 tasks passed
• core, CLI, Console, and V2 docs typechecks passed
• V2 docs validate/build and legacy localized docs build passed
• all 17 localized Go routes remain present
• searches found zero retired command, endpoint, provider, copied-key, or any-agent claims
• formatting and diff checks passed

No merge, deployment, Console enablement, credential mutation, or public cutover is authorized.

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