feat(web): enable self-service account deletion

[eshurakov]

Summary

• Add a profile Danger Zone flow with email challenge confirmation and sign-out.
• Prevent self-service deletion for organization-managed accounts using the primary eligibility flag.
• Add a completion email queue step with durable checkpoints, ambiguity handling, pre-deployment compatibility, and admin visibility.
• Add the transactional email template, migration, and focused regression coverage.

Verification

• Local account-deletion flow tested; screenshot to follow.
• pnpm --filter web exec jest --watchman=false --runInBand --runTestsByPath src/app/admin/deletion-queue/deletion-queue-format.test.ts src/components/profile/DeleteAccountDialog.test.ts — 2 suites, 28 tests passed
• Changed-file Oxlint — passed
• Changed-file Oxfmt — passed

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Executive Summary

Incremental review after rebase found no new correctness, security, or runtime issues; catalog completeness validation is unchanged, and the two tree-level diffs are main-branch rebase artifacts.

Files Reviewed (2 files)

• apps/web/src/app/(app)/profile/page.tsx
• packages/db/src/schema-types.ts

Previous Review Summaries (3 snapshots, latest commit 8ce5c77)

Current summary above is authoritative. Previous snapshots are kept for context only.

Previous review (commit 8ce5c77)

Status: No Issues Found | Recommendation: Merge

Executive Summary

Incremental review of the catalog-completeness fix found no correctness, security, or runtime issues; missing required deletion steps now fail validation in both completion and task selection, with only the documented v2 CompletionEmail exception.

Files Reviewed (4 files)

• apps/web/src/lib/user/deletion-queue/deletion-catalog.test.ts
• apps/web/src/lib/user/deletion-queue/deletion-catalog.ts
• apps/web/src/lib/user/deletion-queue/deletion-completion.test.ts
• apps/web/src/lib/user/deletion-queue/deletion-task-selector.test.ts

Previous review (commit a97963e)

Status: No Issues Found | Recommendation: Merge

Executive Summary

Incremental review of the notify-channel admin UI and delete-account restyle found no correctness, security, or runtime issues.

Files Reviewed (4 files)

• apps/web/src/app/admin/deletion-queue/[id]/DeletionQueueDetailContent.tsx
• apps/web/src/app/admin/deletion-queue/deletion-queue-format.test.ts
• apps/web/src/app/admin/deletion-queue/deletion-queue-format.ts
• apps/web/src/components/profile/DeleteAccountDialog.tsx

Previous review (commit 0d798d5)

Status: No Issues Found | Recommendation: Merge

Files Reviewed (30 files)

• apps/web/src/app/(app)/profile/page.tsx
• apps/web/src/app/admin/deletion-queue/[id]/DeletionQueueDetailContent.tsx
• apps/web/src/app/admin/deletion-queue/deletion-queue-format.ts
• apps/web/src/components/profile/DeleteAccountDialog.test.ts
• apps/web/src/components/profile/DeleteAccountDialog.tsx
• apps/web/src/emails/AGENTS.md
• apps/web/src/emails/accountDeletionCompleted.html
• apps/web/src/lib/email.test.ts
• apps/web/src/lib/email.ts
• apps/web/src/lib/user/deletion-queue/deletion-catalog.test.ts
• apps/web/src/lib/user/deletion-queue/deletion-catalog.ts
• apps/web/src/lib/user/deletion-queue/deletion-completion.test.ts
• apps/web/src/lib/user/deletion-queue/deletion-completion.ts
• apps/web/src/lib/user/deletion-queue/deletion-constants.ts
• apps/web/src/lib/user/deletion-queue/deletion-hints.test.ts
• apps/web/src/lib/user/deletion-queue/deletion-hints.ts
• apps/web/src/lib/user/deletion-queue/deletion-task-selector.test.ts
• apps/web/src/lib/user/deletion-queue/deletion-task-selector.ts
• apps/web/src/lib/user/deletion-queue/handlers/completion-email.test.ts
• apps/web/src/lib/user/deletion-queue/handlers/completion-email.ts
• apps/web/src/lib/user/deletion-queue/handlers/index.ts
• apps/web/src/routers/admin/email-testing-router.ts
• apps/web/src/routers/admin/user-deletion-queue-router.ts
• apps/web/src/routers/user-router.test.ts
• apps/web/src/routers/user-router.ts
• packages/db/src/migrations/0224_outgoing_mentor.sql
• packages/db/src/migrations/meta/0224_snapshot.json
• packages/db/src/migrations/meta/_journal.json
• packages/db/src/schema-types.ts
• packages/db/src/schema.test.ts

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_{Reviewed by grok-4.6 · Input: 198.4K · Output: 10.1K · Cached: 270.6K}

_{Review guidance: REVIEW.md from base branch main}