Slice 2a (Module 03): Slot table + list-own + read-only slot management page

[mGasiorek998]

What to build

Land the doctor_slots schema and the read side of slot management: a doctor-only /doctor/slots page that lists all of their slots (free + booked) sorted ascending by start time. Creation comes in Slice 2b — this slice ships a page that shows an empty state (or seeded slots) and the API/data foundation everything else builds on.

• Drizzle migration: create slot_status Postgres enum (free | booked); create doctor_slots table — UUID PK, doctor_id FK to users.id (ON DELETE CASCADE), starts_at and ends_at timezone-aware non-null, status defaulting to free, composite index on (doctor_id, starts_at), DB check constraint ends_at > starts_at.
• Extend pnpm db:seed to give each seeded doctor at least one free slot so the page is non-empty for demos and so Module 04 has data to consume.
• Fill in doctorContract with listOwnSlots.
• GET /doctors/me/slots → 200 Array<{ id, startsAt, endsAt, status }> sorted ascending by startsAt, both free and booked, behind requireAuth() + requireRole(['doctor']).
• New /doctor/slots route: list table with start/end (rendered in Europe/Warsaw), status badge, empty state. TanStack Router file route, beforeLoad guard that redirects patients to /patient.
• Header row links from /doctor to /doctor/slots.

Acceptance criteria

• Migration applied via pnpm db:push; doctor_slots exists with the composite index and check constraint; the slot_status enum has values free and booked.
• pnpm db:seed populates at least one slot per seeded doctor and is idempotent on re-run.
• GET /doctors/me/slots returns the calling doctor's slots sorted ascending; never includes another doctor's slots.
• GET /doctors/me/slots returns 401 without JWT and 403 with a patient JWT.
• /doctor/slots renders the slot list with Europe/Warsaw-formatted datetimes and a status indicator.
• A patient JWT navigating to /doctor/slots is redirected to /patient.
• An empty-state message renders when the doctor has no slots.
• pnpm verify exits 0.

User stories covered

• US Slice 1: Monorepo scaffold + /health tracer bullet #5: As a doctor, I want to see a list of all my slots (both free and booked) sorted by start time, so that I have a complete view of my schedule.
• US feat: Slice 3 — RBAC middleware, probe routes, /login redirect guard #13: As a patient navigating to a doctor-only route, I want to be automatically redirected to the patient home page, so that I never see a management interface I cannot use.

Blocked by

• None — can start immediately