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/compliance-hub/_components/OverviewTab.tsx

@@ -148,7 +148,7 @@ export function OverviewTab({
                   { key: 'evidence_freshness', label: 'Aktualitaet', color: 'bg-yellow-500' },
                   { key: 'control_effectiveness', label: 'Control-Wirksamkeit', color: 'bg-indigo-500' },
                 ] as const).map(dim => {
-                  const value = (dashboard.multi_score as Record<string, number>)[dim.key] || 0
+                  const value = (dashboard.multi_score as unknown as Record<string, number>)[dim.key] || 0
                   return (
                     <div key={dim.key} className="flex items-center gap-3">
                       <span className="text-xs text-slate-600 w-44 truncate">{dim.label}</span>