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/agent/page.tsx

@@ -7,7 +7,7 @@ import { BannerCheckTab } from './_components/BannerCheckTab'
 import { ComplianceFAQ } from './_components/ComplianceFAQ'
 import { AgentTestTab } from './_components/AgentTestTab'
 
-type AnalysisTab = 'scan' | 'compliance-check' | 'banner-check' | 'agent-test'
+type AnalysisTab = 'scan' | 'compliance-check' | 'banner-check' | 'agent-test' | 'impressum-check' | 'doc-check'
 
 const TABS: { id: AnalysisTab; label: string; desc: string }[] = [
   { id: 'scan', label: 'Website-Scan', desc: 'Rechtliche Dokumente finden + Dienstleister erkennen' },