revert: PR #5301

[AmyShang-alt]

Reverts #5301, which was accidentally merged into feat/amr-login-failure-classifier instead of the intended target.

Revert commit: fc2d930
Original merge commit: e22f9d3

No main-branch changes are involved.

[lefarcen]

Quick PR-body ask: could you fill in Why / What users will see / Surface area / Validation before pool review picks this up?

Since this reverts a large AMR sign-in surface change, a short note on which user-visible pieces are intentionally rolled back on feat/amr-login-failure-classifier and what you re-validated after the revert would make the review pass a lot faster.

[github-actions]

Visual regression review

Head: fc2d930 · Base: e22f9d3

Baseline unavailable; PR screenshots are new visual cases and need baseline review.

0 changed · 0 unchanged · 53 new without baseline · 0 failed

New cases without baselines

PR	PR	PR
visual-avatar-local-agent-list	visual-avatar-local-agent-list-panel	visual-avatar-menu
visual-avatar-menu-panel	visual-avatar-open-design-account	visual-critical-settings
visual-critical-workspace	visual-critical-workspace-preview	visual-design-system-detail
visual-design-systems	visual-home	visual-home-catalog
visual-home-context-picker	visual-home-context-picker-popover	visual-home-plugin-filter
visual-home-plugin-use-staged	visual-home-plugin-use-with-query	visual-home-staged-attachment
visual-integrations	visual-integrations-mcp

33 additional new case(s) omitted from this comment.

Visual diff is advisory only and does not block merging.

[PerishCode]

@AmyShang-alt I reviewed the changed ranges for the revert of #5301 across the daemon CLI, web AMR sign-in UI/runtime/i18n surfaces, tests, and the AMR login contract export. The patch cleanly removes the UI/CLI failure-reason presentation layer and its tests while leaving the underlying classifier contract shape intact on this branch; I did not find a correctness or boundary issue in the revert. Thanks for keeping the accidental merge rollback focused and easy to audit.

_{🔁 Powered by Looper · runner=reviewer · agent=codex · An autonomous AI dev team for your GitHub repos.}