fix(admin): resolve all 266 TypeScript errors, enable strict build

Eliminate the pre-existing TS errors that were masked by
next.config.js `typescript.ignoreBuildErrors: true`, then turn the flag
OFF so the compiler is a real safety net for future changes. `next build`
and `tsc --noEmit` now pass with 0 errors.

The errors were not cosmetic — several exposed real latent bugs hidden by
the flag, e.g. the drafting-engine ConstraintEnforcer read non-existent
fields (`t.rule.dsfaRequired`, `d.required`, `r.title`), so its DSFA hard
gate and risk-flag checks were silently no-ops; scopeDefaults read
snake_case CompanyProfile fields that never matched the camelCase type
(generator defaults never populated). Both fixed by aligning code to the
current types.

Highlights:
- Vitest globals: add vitest-globals.d.ts (config already had globals:true)
  so the test files type-check; exclude Playwright specs from vitest.
- Add a minimal ambient `pg` module declaration (no @types/pg installed).
- Fix Next 15 route handlers to await Promise params.
- Reconcile drifted types across loeschfristen, compliance-scope, document-
  generator, drafting-engine, vendor-compliance, agent and more.

Pre-existing (NOT caused here, proven by stashing the diff): 3 vitest
logic tests still fail — getNextStep (2) and buildDocumentScope priority (1).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

admin-compliance/app/sdk/loeschfristen/_components/ExportTab.tsx

@@ -235,12 +235,12 @@ function ComplianceResultView({
                   {issue.recommendation && (
                     <p className="text-xs text-gray-500 mt-1 italic">Empfehlung: {issue.recommendation}</p>
                   )}
-                  {issue.affectedPolicyId && (
+                  {issue.policyId && (
                     <button
-                      onClick={() => { setEditingId(issue.affectedPolicyId!); setTab('editor') }}
+                      onClick={() => { setEditingId(issue.policyId!); setTab('editor') }}
                       className="text-xs text-purple-600 hover:text-purple-800 font-medium mt-1"
                     >
-                      Zur Loeschfrist: {issue.affectedPolicyId}
+                      Zur Loeschfrist: {issue.policyId}
                     </button>
                   )}
                 </div>