# Task 7 — backend settings + employees (campos nuevos) + script de integración

## Status
**COMPLETE** — all verification green, no commits made.

## Files changed
- `server/routes/settings.ts` — extended `FIELDS` with `auto_assign_specialist`, `working_hours`; added both columns to GET and final-PATCH SELECTs; serialized `working_hours` to JSON when received as object; coerced `auto_assign_specialist` to `0`/`1`.
- `server/routes/employees.ts` — `POST /` and `PATCH /:id` now accept and persist `specialties`, `working_hours`, `efficiency_score` (JSON-serialized arrays/maps, `Number(...)` coercion for efficiency).
- `server/scripts/booking-e2e.mjs` — NEW. Slot-aware integration test covering auto-assign, double-booking 409, and `auto_assign_specialist` exposure on the public business endpoint.
- `package.json` — added `"test:booking": "node server/scripts/booking-e2e.mjs"`.
- `e2e-test.mjs` — fixture adaptation only: added `findSlot(slug, serviceId, maxDays=30)` helper that queries `/public/<slug>/slots` for the next 30 days and returns the first available slot iso; replaced the two hard-coded `start_at` ISO strings (`2026-09-15T11:00:00Z`, `2026-09-20T10:00:00Z`) with slot-aware values. Added a `GET /settings` call after login to obtain the business `slug`. Employee-service fallback: tries service_id 5 first, falls back to 6 (both offered only by Mateo Herrera, so the self-assign assertion still holds).

## Verification results
| Check | Result |
|---|---|
| `npm run typecheck` | **0 errors** |
| `npm run test:unit` | **15/15 passed** |
| `npm run test:e2e` | **25/25 passed** (was failing before the fixture fix) |
| `npm run test:booking` | **9/9 passed** |

## Manual API check (temp .mjs, run + deleted)
- `PATCH /settings { auto_assign_specialist: 1, working_hours: {1:{start:"09:00",end:"13:00"}, ...} }` → PATCH response reflected `auto_assign_specialist = 1` and `working_hours` as a JSON string. `GET /settings` returned the same. `working_hours` parsed back to `{1:{start:"09:00",end:"13:00"}, 3:null, ...}`.
- `PATCH /employees/:id { specialties: ["Cabello","Coloración"], efficiency_score: 87, working_hours: {...} }` → reflected `specialties = ["Cabello","Coloración"]`, `efficiency_score = 87` with `typeof === "number"`, and `working_hours` JSON. `GET /employees/:id` confirmed persistence. Restored afterwards.

## Self-review
- **settings serializes `working_hours`?** YES — `merged.working_hours = JSON.stringify(merged.working_hours)` when not already a string; stored as TEXT, returned verbatim by both SELECTs.
- **settings coerces `auto_assign_specialist` to 0/1?** YES — `merged.auto_assign_specialist = merged.auto_assign_specialist ? 1 : 0`.
- **employees coerces `efficiency_score` to `Number`?** YES — both POST (`typeof === "number" ? efficiency_score : 50`) and PATCH (`Number(efficiency_score)` with fallback to `existing.efficiency_score ?? 50`). Confirmed via manual check: returned value has `typeof === "number"`.
- **employees handles `specialties`/`working_hours` JSON?** YES — POST stringifies the array/object; PATCH merges with existing and accepts string, object/array, or `null` (for `working_hours`).
- **booking-e2e covers auto-assign + 409 + `auto_assign_specialist` exposure?** YES — step 4 books without `employee_id` and asserts the response contains `employee_id` + non-empty `reasons` (auto-assign); step 5 re-books the same slot/employee and asserts `409`; step 6 toggles `auto_assign_specialist` to 1 via PATCH and asserts the public `/public/<slug>` response exposes `business.auto_assign_specialist === 1`.
- **e2e-test now passes without weakening guards?** YES — no guards were changed (only `settings.ts`, `employees.ts`, `e2e-test.mjs`, new `booking-e2e.mjs`, and `package.json` were touched; `booking.ts`, `appointments.ts`, `scheduling.ts`, `db.ts`, `types.ts` untouched). The fix is purely test-fixture: instead of hard-coding out-of-working-hours ISO strings (`11:00Z` ≈ 05:00 local, and `2026-09-20` is Sunday — both correctly rejected by the new working-hours enforcement), the test now fetches a real available slot from the same public endpoint that respects the guards. All 25 original assertions preserved; 4 new helper assertions added (slot lookups + slug).

## Deviations
- **e2e-test.mjs employee-service fallback (svc 5 → svc 6).** The plan does not mandate this; the additional sub-task says "If service_id 5 has no slots, pick another service the employee offers". Implemented as: try service 5 across 30 days; if null, try service 6. In practice service 5 always yields slots in the seed data, so the fallback never fires — but it makes the test robust to seed variation. The self-assign assertion still holds because both services 5 and 6 are offered exclusively by Mateo Herrera.
- **`findSlot` searches 30 days** (vs. a single weekday in the suggested approach) — gives the fixture more headroom to dodge dense seed bookings without weakening any guard.

## Concerns
None.