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/types/pg.d.ts

@@ -0,0 +1,25 @@
+// Minimal ambient types for node-postgres (pg) — @types/pg is not installed.
+// Mirrors @types/pg's permissive defaults (rows: any) so the existing raw-SQL
+// route handlers type-check exactly as they would with the real @types/pg.
+declare module 'pg' {
+  export interface QueryResult<R = any> {
+    rows: R[]
+    rowCount: number
+  }
+  export interface PoolConfig {
+    connectionString?: string
+    ssl?: boolean | { rejectUnauthorized?: boolean }
+    max?: number
+    [key: string]: unknown
+  }
+  export class Pool {
+    constructor(config?: PoolConfig)
+    query<R = any>(text: string, values?: unknown[]): Promise<QueryResult<R>>
+    connect(): Promise<PoolClient>
+    end(): Promise<void>
+  }
+  export interface PoolClient {
+    query<R = any>(text: string, values?: unknown[]): Promise<QueryResult<R>>
+    release(): void
+  }
+}