Retire MiMo entrypoints with mobile maintenance dialog

[rayalexvector]

Scope

Preserve homepage appearance while showing a maintenance dialog from login and AI entrypoints. Block authentication submissions, model calls and microphone capture from the retired UI. Preserve historical data and shared account/game services.

Verification

• 57 frontend unit tests and site checks passed locally.
• Maintenance UI passed desktop, 390x844, 320x568 and 844x390 touch viewports, unchanged homepage geometry, focus restoration and zero mutation/model requests.
• Existing authentication/media regression remains covered through an isolated test-only response fixture.
• Fix Chrome 154 SW-upgrade test initiation using an uncontrolled client; retain takeover, cache cleanup, offline assertions and original timeout.
• Required verify CI must pass before merge.

Private backend retirement is released separately with binding and source drift verification. No database migration or user-data deletion.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-07T15:53:54.577598Z	32b93eb	PR opened

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