---
id: S04
parent: M001
milestone: M001
provides:
  - 9 review queue API endpoints mounted at /api/v1/review/*
  - React+Vite+TypeScript frontend with admin UI at /admin/review
  - Typed API client (frontend/src/api/client.ts) for all review endpoints
  - Reusable StatusBadge and ModeToggle components
  - Redis-backed review mode toggle with config fallback
  - 24 integration tests for review endpoints
requires:
  - slice: S03
    provides: KeyMoment model with review_status field, pipeline that creates moments in DB
affects:
  - S05
key_files:
  - backend/routers/review.py
  - backend/schemas.py
  - backend/redis_client.py
  - backend/main.py
  - backend/tests/test_review.py
  - frontend/package.json
  - frontend/vite.config.ts
  - frontend/tsconfig.json
  - frontend/index.html
  - frontend/src/main.tsx
  - frontend/src/App.tsx
  - frontend/src/App.css
  - frontend/src/api/client.ts
  - frontend/src/pages/ReviewQueue.tsx
  - frontend/src/pages/MomentDetail.tsx
  - frontend/src/components/StatusBadge.tsx
  - frontend/src/components/ModeToggle.tsx
key_decisions:
  - Redis mode toggle uses per-request get_redis() with aclose() — no connection pool (D007)
  - API client uses bare fetch() with shared request() helper — no external HTTP library
  - MomentDetail fetches full queue to find moment by ID since no single-moment GET endpoint exists
  - Split creates new moment with '(split)' title suffix; merge combines summaries with double-newline separator
  - Split dialog validates timestamp client-side before API call
patterns_established:
  - React + Vite + TypeScript frontend pattern: strict TS config, Vite dev proxy to backend, typed API client with fetch()-based request helper
  - Reusable component extraction (StatusBadge, ModeToggle) for consistent styling across admin pages
  - Review router pattern: async SQLAlchemy with joined loads for cross-table data (moment + video + creator)
  - Redis as runtime config store with config.py fallback for settings that need to be mutable at runtime
observability_surfaces:
  - GET /api/v1/review/stats — returns pending/approved/edited/rejected counts
  - GET /api/v1/review/mode — returns current review/auto mode
  - INFO log on each review action (approve/reject/edit/split/merge) with moment_id
  - 404 responses include moment_id not found; 400 responses include validation details
drill_down_paths:
  - .gsd/milestones/M001/slices/S04/tasks/T01-SUMMARY.md
  - .gsd/milestones/M001/slices/S04/tasks/T02-SUMMARY.md
  - .gsd/milestones/M001/slices/S04/tasks/T03-SUMMARY.md
duration: ""
verification_result: passed
completed_at: 2026-03-29T23:35:54.561Z
blocker_discovered: false
---

# S04: Review Queue Admin UI

**Delivered the complete review queue admin UI: 9 backend API endpoints with 24 integration tests, a React+Vite+TypeScript frontend with typed API client, and full admin pages for queue browsing, moment review/edit/split/merge, and review-vs-auto mode toggle.**

## What Happened

This slice built the admin review interface across three tasks spanning backend API, frontend scaffold, and full UI implementation.

**T01 — Review Queue Backend API.** Added 8 Pydantic schemas and 9 async endpoints to a new `backend/routers/review.py`: list queue (paginated, status-filtered), stats (counts by status), approve, reject, edit (with review_status=edited), split (validates split_time within range), merge (validates same source video), and get/set review mode. Review mode is persisted in Redis (`chrysopedia:review_mode` key) with fallback to `settings.review_mode` config default. A `backend/redis_client.py` module provides `get_redis()` for per-request connections. The router is mounted in `main.py` under `/api/v1`. 24 integration tests cover happy paths, 404s, 400s for boundary conditions (split outside range, merge across videos, merge with self), and Redis mock tests for mode toggle (including error fallback).

**T02 — Frontend Scaffold.** Replaced the placeholder frontend with React 18 + Vite 6 + TypeScript 5.6. Created `vite.config.ts` with dev proxy (`/api` → `localhost:8001`), strict TypeScript config, BrowserRouter routes (`/admin/review` → ReviewQueue, `/admin/review/:momentId` → MomentDetail), and a fully typed `src/api/client.ts` with 9 exported functions and TypeScript interfaces matching the backend schemas.

**T03 — Admin UI Pages.** Built the full queue page with stats bar (counts per status), 5 filter tabs, paginated card list, and ModeToggle in header. Built the detail page with full moment display, action buttons (Approve/Reject navigate back, Edit toggles inline editing, Split opens modal with timestamp validation, Merge opens modal with same-video dropdown), and loading/error states. Created reusable StatusBadge and ModeToggle components. Comprehensive CSS with responsive layout.

## Verification

**All slice-level verification checks passed:**

1. `cd backend && python -m pytest tests/test_review.py -v` — 24/24 passed (11.4s)
2. `cd backend && python -m pytest tests/ -v` — 40/40 passed, zero regressions (133.5s)
3. `cd backend && python -c "from routers.review import router; print(len(router.routes))"` — prints 9
4. `cd frontend && npm run build && test -f dist/index.html` — build succeeds, dist/index.html exists
5. `cd frontend && npx tsc --noEmit` — zero TypeScript errors
6. `grep -q 'fetchQueue|approveMoment|getReviewMode' frontend/src/api/client.ts` — API client has all key functions
7. `grep -q 'StatusBadge|ModeToggle' frontend/src/pages/ReviewQueue.tsx` — components integrated
8. `grep -q 'approve|reject|split|merge' frontend/src/pages/MomentDetail.tsx` — all actions present

## Requirements Advanced

- R004 — All R004 capabilities delivered: approve, edit+approve, split, merge, reject actions via API and UI; mode toggle for review vs auto-publish; queue organized with status filters and stats

## Requirements Validated

- R004 — 24 backend integration tests verify all review actions (approve, reject, edit, split, merge) with correct status transitions, boundary validation (split_time range, same-video merge), and mode toggle. Frontend builds with TypeScript and renders queue list with filters, detail page with all action buttons/modals.

## New Requirements Surfaced

None.

## Requirements Invalidated or Re-scoped

None.

## Deviations

1. MomentDetail page fetches the full queue (limit=500) to find an individual moment by ID, since no dedicated single-moment GET endpoint was built. Acceptable for a single-admin tool.
2. T02 added `src/vite-env.d.ts` for Vite type declarations (not in plan, required by TypeScript).
3. ReviewQueue page fetches real data with loading/error states on mount instead of bare placeholder text (exceeded plan expectations).

## Known Limitations

1. No dedicated `GET /review/moments/{id}` endpoint — MomentDetail works around this by fetching the full queue. Fine for single-admin scale.
2. Redis mode toggle is a UI-level concept — the pipeline's `stages.py` still reads `settings.review_mode` from config. To fully enforce mode, stages.py would need a Redis check (deferred).
3. No authentication/authorization on review endpoints — acceptable for internal admin tool on private network.

## Follow-ups

1. Consider adding a `GET /review/moments/{id}` endpoint to avoid the queue-scan workaround in MomentDetail.
2. Wire the pipeline's `stages.py` to check Redis `chrysopedia:review_mode` so the toggle actually controls whether new moments are auto-approved or queued for review.
3. Add basic auth or API key protection to review endpoints before exposing beyond local network.

## Files Created/Modified

- `backend/routers/review.py` — New: 9 async review queue endpoints (354 lines)
- `backend/schemas.py` — Added 8 Pydantic schemas for review queue (ReviewQueueItem, ReviewQueueResponse, ReviewStatsResponse, MomentEditRequest, MomentSplitRequest, MomentMergeRequest, ReviewModeResponse, ReviewModeUpdate)
- `backend/redis_client.py` — New: async Redis client helper with get_redis()
- `backend/main.py` — Mounted review router under /api/v1
- `backend/tests/test_review.py` — New: 24 integration tests for review endpoints (495 lines)
- `frontend/package.json` — New: React 18 + Vite 6 + TypeScript 5.6 dependencies
- `frontend/vite.config.ts` — New: Vite config with React plugin and /api dev proxy
- `frontend/tsconfig.json` — New: strict TypeScript config
- `frontend/index.html` — New: Vite entry point
- `frontend/src/main.tsx` — New: React app entry with BrowserRouter
- `frontend/src/App.tsx` — New: App shell with routes and nav header
- `frontend/src/App.css` — New: Comprehensive admin CSS (620 lines)
- `frontend/src/api/client.ts` — New: Typed API client with 9 functions and TypeScript interfaces (187 lines)
- `frontend/src/pages/ReviewQueue.tsx` — New: Queue list page with stats bar, filter tabs, pagination, mode toggle
- `frontend/src/pages/MomentDetail.tsx` — New: Moment detail page with approve/reject/edit/split/merge actions (458 lines)
- `frontend/src/components/StatusBadge.tsx` — New: Reusable status badge with color coding
- `frontend/src/components/ModeToggle.tsx` — New: Review/auto mode toggle component
