Phase 1: project foundation for Alpenwerk HR

Scaffolds the Next.js 16 / TypeScript strict / Tailwind v3 app per
NEXTJS_REBUILD_SUPERPROMPT.md, and implements the Foundation slice from
the Phase 1 plan:

- Corrected Supabase schema (supabase/schema.sql): org units, employees,
  history, positions, hire drafts, saved reports, audit log, reorg
  scenarios, role-based profiles, salary-masking view, RLS policies,
  auto-derivation triggers, position-number generator.
- Seed script (supabase/seed.ts): ~800 realistic Austrian employees across
  9 divisions / 16 departments / 35 teams, history, 8 open positions, and
  hr_admin/manager test accounts.
- Supabase clients (lib/supabase/*), design tokens (tailwind.config.ts),
  format/color helpers (lib/format.ts, lib/colors.ts).
- Shared UI kit (components/ui): Avatar, StatusChip, Toast, Modal,
  SlideOver, SegmentedControl, Lookup.
- Auth (login page, Server Actions) and proxy.ts (Next 16's replacement
  for middleware) guarding the authenticated route group.
- Shell (Sidebar, Topbar, NewHireButton stub) and the Dashboard page,
  reading live data via employees_directory.

Employees list/detail, hire wizard, action panels, org chart, positions,
reports, and audit log are deferred to later phases per the plan.

components/ui/StatusChip.tsx

@@ -0,0 +1,19 @@
+import { STATUS_STYLES } from "@/lib/colors";
+import { fmtDate } from "@/lib/format";
+import type { EmploymentStatus } from "@/lib/supabase/types";
+
+type StatusChipProps = {
+  status: EmploymentStatus;
+  entryDate?: string | null; // shown as "Eintritt {date}" when status is Geplant
+};
+
+export function StatusChip({ status, entryDate }: StatusChipProps) {
+  const label = status === "Geplant" && entryDate ? `Eintritt ${fmtDate(entryDate)}` : status;
+  return (
+    <span
+      className={`inline-flex items-center whitespace-nowrap rounded-full px-2.5 py-0.5 text-xs font-semibold ${STATUS_STYLES[status]}`}
+    >
+      {label}
+    </span>
+  );
+}