Remove Supabase

The database moved to a container of our own; the platform is gone.
This takes out what was left of it — and, where the leftovers were load
bearing, moves rather than deletes.

Moved, not deleted:

  supabase/migrations/  -> db/migrations/      the schema's source of truth
  supabase/build-org.ts -> scripts/build-org.ts
  lib/supabase/types.ts -> lib/types.ts        52 import sites repointed

The bookkeeping needed care. It lived in `supabase_migrations.schema_migrations`,
and simply renaming the schema would have left the runner facing an empty
table: it would have called all 67 migrations pending and replayed them
against a database that is long since current. So the runner now creates
`migrationen.schema_migrations` and, once, copies the old rows across —
guarded so a second run does nothing and a fresh database skips it entirely.
Only then does migration 20260907100000 drop the old schema.

Deleted: the CLI config, the seed, the historical schema/function dumps
(nothing read them), scripts/umzug-von-supabase.sh (the move is done), and
both Supabase packages plus the CLI. Nothing in the application imported
them — the build now succeeds with no environment variables at all, which
is the proof.

Integration tests: six of them signed in through Supabase Auth and asserted
against the anon key and the service role. That model is gone, so the tests
were not portable — they are deleted. session-context and
employee-status-filter already ran on pg and are untouched; om-reporting is
ported to a direct connection because it guards a real risk (the reporting
line rule exists twice, once in SQL and once in TypeScript).

CI: the integration job started a Supabase stack. It now runs a postgres
service, applies deploy/db-init and every migration to an empty database —
that was the valuable part, and it still holds — then checks that a second
run is a no-op, which is what proves the bookkeeping works.

Docs: security-review.md audited a service-role key, a cookie adapter and
auth.users, none of which exist. Restating findings about removed components
would suggest today's system had been reviewed; it has not. It now records
what was removed and says a fresh review is due. data-model.md was already
marked obsolete and described the pre-OM schema; azure-migration.md was a
plan for a route not taken. Both deleted.

Verified: npm ci, typecheck, lint, 445 tests, build — all clean without the
packages. Integration tests skip cleanly with no database. Migration SQL and
the runner are reviewed but NOT executed: no Docker here, and the old
instance no longer resolves.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

db/migrations/20260715120000_split_address_fields.sql

@@ -0,0 +1,202 @@
+-- Split the combined "Straße Nr, PLZ Ort" address string into three fields.
+--
+-- employees.address now holds only Straße + Hausnummer (still a single
+-- free-text line); postal_code and city are their own columns so the UI
+-- can offer them as separate inputs and reports/exports can filter or
+-- group by them independently.
+alter table employees add column if not exists postal_code text;
+alter table employees add column if not exists city text;
+
+-- Best-effort backfill for existing rows seeded in the old combined format
+-- (supabase/seed.ts previously wrote "Straße Nr, PLZ Ort"). Only rewrites
+-- rows that actually match that exact "<street>, <postal> <city>" shape;
+-- anything else (already-split rows, hand-edited free text, no comma) is
+-- left untouched for HR to fill in via "Daten ändern".
+update employees
+set
+  postal_code = trim(split_part(split_part(address, ', ', 2), ' ', 1)),
+  city = trim(substring(split_part(address, ', ', 2) from '\S+\s+(.*)$')),
+  address = trim(split_part(address, ', ', 1))
+where address ~ '^[^,]+,\s*\d{3,6}\s*[[:alpha:]].*$';
+
+-- ── change_employee_data: recognize postal_code/city as person fields ──
+create or replace function change_employee_data(payload jsonb)
+returns void language plpgsql as $$
+declare
+  v_employee_id uuid := (payload->>'employee_id')::uuid;
+  v_effective_date date := coalesce(nullif(payload->>'effective_date', '')::date, current_date);
+  v_old employees%rowtype;
+  v_name text;
+  v_person_changes text[] := '{}';
+  v_contract_changes text[] := '{}';
+  v_person jsonb := payload->'person';
+  v_contract jsonb := payload->'contract';
+  v_immediate boolean;
+begin
+  perform require_hr_admin();
+  select * into v_old from employees where id = v_employee_id;
+  v_name := v_old.first_name || ' ' || v_old.last_name;
+  v_immediate := v_effective_date <= current_date;
+
+  if v_person ? 'first_name' and (v_person->>'first_name') <> v_old.first_name then v_person_changes := array_append(v_person_changes, 'Vorname'); end if;
+  if v_person ? 'last_name' and (v_person->>'last_name') <> v_old.last_name then v_person_changes := array_append(v_person_changes, 'Nachname'); end if;
+  if v_person ? 'gender' and (v_person->>'gender') <> v_old.gender::text then v_person_changes := array_append(v_person_changes, 'Geschlecht'); end if;
+  if v_person ? 'birth_date' and (v_person->>'birth_date')::date <> v_old.birth_date then v_person_changes := array_append(v_person_changes, 'Geburtsdatum'); end if;
+  if v_person ? 'sv_nummer' and coalesce(v_person->>'sv_nummer','') <> coalesce(v_old.sv_nummer,'') then v_person_changes := array_append(v_person_changes, 'SV-Nummer'); end if;
+  if v_person ? 'nationality' and (v_person->>'nationality') <> v_old.nationality then v_person_changes := array_append(v_person_changes, 'Staatsbürgerschaft'); end if;
+  if v_person ? 'address' and coalesce(v_person->>'address','') <> coalesce(v_old.address,'') then v_person_changes := array_append(v_person_changes, 'Adresse'); end if;
+  if v_person ? 'postal_code' and coalesce(v_person->>'postal_code','') <> coalesce(v_old.postal_code,'') then v_person_changes := array_append(v_person_changes, 'Postleitzahl'); end if;
+  if v_person ? 'city' and coalesce(v_person->>'city','') <> coalesce(v_old.city,'') then v_person_changes := array_append(v_person_changes, 'Ort'); end if;
+  if v_person ? 'address_country' and coalesce(v_person->>'address_country','') <> coalesce(v_old.address_country,'') then v_person_changes := array_append(v_person_changes, 'Land'); end if;
+  if v_person ? 'email' and (v_person->>'email') <> v_old.email then v_person_changes := array_append(v_person_changes, 'E-Mail'); end if;
+  if v_person ? 'phone' and coalesce(v_person->>'phone','') <> coalesce(v_old.phone,'') then v_person_changes := array_append(v_person_changes, 'Telefon'); end if;
+
+  if v_contract ? 'employment_type' and (v_contract->>'employment_type') <> v_old.employment_type::text then v_contract_changes := array_append(v_contract_changes, 'Beschäftigungsausmaß'); end if;
+  if v_contract ? 'weekly_hours' and (v_contract->>'weekly_hours')::numeric <> v_old.weekly_hours then v_contract_changes := array_append(v_contract_changes, 'Wochenstunden'); end if;
+  if v_contract ? 'contract_type' and (v_contract->>'contract_type') <> v_old.contract_type::text then v_contract_changes := array_append(v_contract_changes, 'Vertragsart'); end if;
+  if v_contract ? 'contract_end_date' and coalesce(nullif(v_contract->>'contract_end_date','')::date::text,'') <> coalesce(v_old.contract_end_date::text,'') then v_contract_changes := array_append(v_contract_changes, 'Befristet bis'); end if;
+
+  if v_immediate then
+    update employees set
+      first_name = coalesce(v_person->>'first_name', first_name),
+      last_name = coalesce(v_person->>'last_name', last_name),
+      gender = coalesce((v_person->>'gender')::gender_type, gender),
+      birth_date = coalesce((v_person->>'birth_date')::date, birth_date),
+      sv_nummer = coalesce(v_person->>'sv_nummer', sv_nummer),
+      nationality = coalesce(v_person->>'nationality', nationality),
+      address = coalesce(v_person->>'address', address),
+      postal_code = coalesce(v_person->>'postal_code', postal_code),
+      city = coalesce(v_person->>'city', city),
+      address_country = coalesce(v_person->>'address_country', address_country),
+      email = coalesce(v_person->>'email', email),
+      phone = coalesce(v_person->>'phone', phone),
+      employment_type = coalesce((v_contract->>'employment_type')::employment_type, employment_type),
+      weekly_hours = coalesce((v_contract->>'weekly_hours')::numeric, weekly_hours),
+      contract_type = coalesce((v_contract->>'contract_type')::contract_type, contract_type),
+      contract_end_date = case when v_contract ? 'contract_end_date' then nullif(v_contract->>'contract_end_date','')::date else contract_end_date end
+    where id = v_employee_id;
+  elsif array_length(v_person_changes, 1) > 0 or array_length(v_contract_changes, 1) > 0 then
+    insert into pending_org_changes (employee_id, change_type, effective_date, payload)
+      values (v_employee_id, 'contract_change', v_effective_date, payload);
+  end if;
+
+  if array_length(v_person_changes, 1) > 0 then
+    insert into employee_history (employee_id, event_date, event_type, description)
+      values (v_employee_id, v_effective_date, 'Stammdatenänderung', 'Geänderte Felder: ' || array_to_string(v_person_changes, ', ') || ', wirksam ab ' || v_effective_date);
+    insert into audit_log (actor_user_id, actor_name, action, target_label, target_employee_id, details)
+      values (auth.uid(), current_actor_name(), 'Stammdatenänderung', v_name, v_employee_id, array_to_string(v_person_changes, ', ') || ', wirksam ab ' || v_effective_date);
+  end if;
+
+  if array_length(v_contract_changes, 1) > 0 then
+    insert into employee_history (employee_id, event_date, event_type, description)
+      values (v_employee_id, v_effective_date, 'Vertragsänderung', 'Geänderte Felder: ' || array_to_string(v_contract_changes, ', ') || ', wirksam ab ' || v_effective_date);
+    insert into audit_log (actor_user_id, actor_name, action, target_label, target_employee_id, details)
+      values (auth.uid(), current_actor_name(), 'Vertragsänderung', v_name, v_employee_id, array_to_string(v_contract_changes, ', ') || ', wirksam ab ' || v_effective_date);
+  end if;
+end;
+$$;
+
+-- ── apply_due_pending_changes: mirror the same postal_code/city handling
+-- in the deferred contract_change branch ──
+create or replace function apply_due_pending_changes()
+returns int
+language plpgsql
+security definer
+set search_path = public
+as $$
+declare
+  v_rec record;
+  v_team_id uuid;
+  v_division_id uuid;
+  v_is_lead boolean;
+  v_manager uuid;
+  v_remaining int;
+  v_applied_count int := 0;
+begin
+  for v_rec in
+    select * from pending_org_changes
+    where status = 'pending' and effective_date <= current_date
+    order by created_at
+  loop
+    if v_rec.change_type = 'transfer' then
+      select is_lead into v_is_lead from employees where id = v_rec.employee_id;
+      select division_id into v_division_id from teams t join departments d on d.id = t.department_id
+        where t.id = (v_rec.payload->>'new_team_id')::uuid;
+      v_manager := resolve_manager_for((v_rec.payload->>'new_team_id')::uuid, v_is_lead, v_division_id);
+      update employees set
+        team_id = (v_rec.payload->>'new_team_id')::uuid,
+        job_title = coalesce(nullif(v_rec.payload->>'new_title', ''), job_title),
+        manager_id = v_manager
+      where id = v_rec.employee_id;
+
+    elsif v_rec.change_type = 'promotion' then
+      update employees set
+        job_title = coalesce(v_rec.payload->>'new_title', job_title),
+        paygrade = coalesce((v_rec.payload->>'new_paygrade')::paygrade_type, paygrade)
+      where id = v_rec.employee_id;
+
+    elsif v_rec.change_type = 'karenz_start' then
+      update employees set status = 'Karenz', karenz_return_date = (v_rec.payload->>'planned_return_date')::date
+        where id = v_rec.employee_id;
+
+    elsif v_rec.change_type = 'karenz_return' then
+      select team_id, division_id, is_lead into v_team_id, v_division_id, v_is_lead
+        from employees where id = v_rec.employee_id;
+      v_manager := resolve_manager_for(v_team_id, v_is_lead, v_division_id);
+      update employees set
+        status = 'Aktiv',
+        karenz_return_date = null,
+        karenz_start_date = null,
+        manager_id = v_manager,
+        employment_type = coalesce((v_rec.payload->>'employment_type')::employment_type, employment_type),
+        weekly_hours = coalesce((v_rec.payload->>'weekly_hours')::numeric, weekly_hours)
+      where id = v_rec.employee_id;
+
+    elsif v_rec.change_type = 'contract_change' then
+      update employees set
+        first_name = coalesce(v_rec.payload->'person'->>'first_name', first_name),
+        last_name = coalesce(v_rec.payload->'person'->>'last_name', last_name),
+        gender = coalesce((v_rec.payload->'person'->>'gender')::gender_type, gender),
+        birth_date = coalesce((v_rec.payload->'person'->>'birth_date')::date, birth_date),
+        sv_nummer = coalesce(v_rec.payload->'person'->>'sv_nummer', sv_nummer),
+        nationality = coalesce(v_rec.payload->'person'->>'nationality', nationality),
+        address = coalesce(v_rec.payload->'person'->>'address', address),
+        postal_code = coalesce(v_rec.payload->'person'->>'postal_code', postal_code),
+        city = coalesce(v_rec.payload->'person'->>'city', city),
+        address_country = coalesce(v_rec.payload->'person'->>'address_country', address_country),
+        email = coalesce(v_rec.payload->'person'->>'email', email),
+        phone = coalesce(v_rec.payload->'person'->>'phone', phone),
+        employment_type = coalesce((v_rec.payload->'contract'->>'employment_type')::employment_type, employment_type),
+        weekly_hours = coalesce((v_rec.payload->'contract'->>'weekly_hours')::numeric, weekly_hours),
+        contract_type = coalesce((v_rec.payload->'contract'->>'contract_type')::contract_type, contract_type),
+        contract_end_date = case when v_rec.payload->'contract' ? 'contract_end_date'
+          then nullif(v_rec.payload->'contract'->>'contract_end_date','')::date else contract_end_date end
+      where id = v_rec.employee_id;
+
+    elsif v_rec.change_type = 'reorg' then
+      select is_lead into v_is_lead from employees where id = v_rec.employee_id;
+      select division_id into v_division_id from teams t join departments d on d.id = t.department_id
+        where t.id = (v_rec.payload->>'target_team_id')::uuid;
+      v_manager := resolve_manager_for((v_rec.payload->>'target_team_id')::uuid, v_is_lead, v_division_id);
+      update employees set team_id = (v_rec.payload->>'target_team_id')::uuid, manager_id = v_manager
+        where id = v_rec.employee_id;
+    end if;
+
+    update pending_org_changes set status = 'applied', applied_at = now() where id = v_rec.id;
+    v_applied_count := v_applied_count + 1;
+
+    if v_rec.reorg_scenario_id is not null then
+      select count(*) into v_remaining from pending_org_changes
+        where reorg_scenario_id = v_rec.reorg_scenario_id and status = 'pending';
+      if v_remaining = 0 then
+        update reorg_scenarios set applied = true, applied_at = now() where id = v_rec.reorg_scenario_id;
+      end if;
+    end if;
+  end loop;
+
+  return v_applied_count;
+end;
+$$;
+
+revoke execute on function apply_due_pending_changes() from public, anon, authenticated;
+grant execute on function apply_due_pending_changes() to service_role;