SVNR validation, CI, and a dependency/security pass

Positions
- Removed the "Besetzen" action, the StaffInternallyModal behind it and the
  now-unreachable staffPositionInternally server action: a position is filled
  through the hire process, not from the positions list. Note that
  transfer_employee has no position_id at all and never touched `positions`,
  so with staff_position_internally out of the UI, hire_employee is the only
  thing that closes a position — a transfer into an open one leaves it open.
  The RPC itself is still in the database and still covered by its tests.

SVNR
- Austrian social security numbers are now validated: ten digits, weighted
  check digit mod 11, and the TTMMJJ tail cross-checked against birth_date,
  which is what catches a transposed date that a valid check digit would let
  through. A serial whose weighted sum lands on 11 is rejected rather than
  wrapped — those are never issued.
- Applies to Austrian locations only; the German/Czech/Slovenian equivalents
  have their own formats and stay free-form.
- Enforced by a trigger, not inside hire_employee/change_employee_data, for
  the same reason as the assignment history: both have been redefined by
  half a dozen migrations. Only a *newly written* value is checked, so a
  legacy number never blocks an unrelated transfer or address change.
- The seed drew a random four-digit prefix, so its check digit was right
  only by chance and every seeded Austrian row would now be rejected;
  it computes the check digit properly now.

Tech stack
- next 16.2.11 closes nine advisories against 16.2.10, including a
  middleware/proxy bypass in App Router apps on Turbopack — proxy.ts is this
  app's entry gate. RLS remains the real boundary, so the blast radius was a
  blank page rather than data, but it is a patch-level fix. Also react
  19.2.8, tailwind 4.3.3, lucide-react 1.26, supabase-js/ssr, postcss.
- CI runs lint, typecheck, schema/type drift, tests and build; a second job
  replays every migration onto an empty database and runs the integration
  suite against it, so a migration that cannot be replayed from scratch
  fails here instead of during a restore.
- scripts/check-schema-types.mjs diffs the hand-written lib/supabase/types.ts
  against the migrations. Reading the SQL rather than a live database keeps
  Postgres out of the fast CI job. Verified in both directions.
- vitest now runs two projects: node for logic, jsdom for components. The
  first component test covers the org chart expand control, which broke
  earlier this session when elementsSelectable={false} made React Flow
  compute pointer-events:none for the whole node; re-introducing that prop
  fails three of these tests.
- Content-Security-Policy is emitted report-only. Enforcing a policy derived
  from inspection rather than from violation reports risks blanking the app;
  'unsafe-inline' on script-src is required until a nonce is threaded through
  proxy.ts, which is a separate change.
- Fixed supabase/seed.ts, which this session's SVNR change had broken: the
  extensionless "../lib/svnr" import does not resolve under Node's ESM
  loader, so the seed failed at startup.
- engines pinned to node >=22 <25, tsconfig target ES2022, and the dead
  test:e2e script removed (no Playwright is installed).

package.json

@@ -11,32 +11,40 @@
     "test": "vitest run",
     "test:watch": "vitest",
     "test:integration": "node --env-file=.env.test.local node_modules/vitest/vitest.mjs run --config vitest.integration.config.ts",
-    "test:e2e": "playwright test",
+    "types:generate": "supabase gen types typescript --local > lib/supabase/types.generated.ts",
+    "types:check": "node scripts/check-schema-types.mjs",
     "check": "npm run lint && npm run typecheck && npm run test && npm run build"
   },
+  "engines": {
+    "node": ">=22 <25"
+  },
   "dependencies": {
     "@dagrejs/dagre": "^3.0.0",
-    "@supabase/ssr": "^0.12.1",
-    "@supabase/supabase-js": "^2.110.5",
+    "@supabase/ssr": "^0.12.3",
+    "@supabase/supabase-js": "^2.110.8",
     "@xyflow/react": "^12.11.2",
     "exceljs": "^4.4.0",
-    "lucide-react": "^1.24.0",
-    "next": "16.2.10",
-    "react": "19.2.7",
-    "react-dom": "19.2.7",
+    "lucide-react": "^1.26.0",
+    "next": "^16.2.11",
+    "react": "^19.2.8",
+    "react-dom": "^19.2.8",
     "server-only": "^0.0.1"
   },
   "devDependencies": {
-    "@tailwindcss/postcss": "^4.3.2",
+    "@tailwindcss/postcss": "^4.3.3",
+    "@testing-library/jest-dom": "^7.0.0",
+    "@testing-library/react": "^16.3.2",
+    "@testing-library/user-event": "^14.6.1",
     "@types/node": "^24.13.3",
     "@types/react": "^19.2.17",
     "@types/react-dom": "^19.2.3",
     "@vitest/coverage-v8": "^4.1.10",
     "eslint": "^9.39.5",
-    "eslint-config-next": "16.2.10",
+    "eslint-config-next": "^16.2.11",
+    "jsdom": "^29.1.1",
     "postcss": "^8.5.19",
     "supabase": "^2.109.1",
-    "tailwindcss": "^4.3.2",
+    "tailwindcss": "^4.3.3",
     "typescript": "^5.9.3",
     "vitest": "^4.1.10"
   },