Workstream 1: Projekt-Fundament & Design-System (Phase 0)

Greenfield-Next.js-15-App-Router-Gerüst (TS strict) mit:
- Route-Groups (auth)/(app) inkl. loading/error/not-found je Group;
  Guard-Slot-Kommentar im (app)/layout.tsx (vom Auth-WS zu füllen).
- "Amtlich"/Netzknoten-Designsystem: Tailwind-Tokens (Navy #1B3A5B,
  Signalrot #E2231A, Anthrazit, Nebelgrau, bereit/Wartung), tabular-nums,
  Serif-Display/Inter-Sans via CSS-Variablen, Inline-SVG-Logo.
- Radix-Basiskomponenten (button/input/label/badge/tabs/dialog/select/
  switch/slider); StatusBadge entspricht asset_status.
- Kanonisches src/lib/env.ts (Zod, Fail-Fast) mit ALLEN DB-/Auth-/Geo-Slots
  inkl. AUTH_URL; isHttps-Ableitung. Zentrale i18n-Tabelle de.ts + t().
- Drizzle-Setup: client.ts (Pool-Singleton), leeres schema/index.ts-Barrel
  (KEIN Migrations-Eigentümer), drizzle.config.ts, .env.example.
- next.config.ts: output:standalone, experimental.authInterrupts,
  Security-Header. Vitest + Fail-Fast-Env-Test (TDD, 5/5 grün).

Bewusst KEINE Auth-Logik und KEINE fachlichen Tabellen.

Verifikation: typecheck/lint/test grün; npm run build erzeugt
.next/standalone/server.js; curl /anmelden -> lang="de" + FlorianNetz.
next/font/google durch CSS-Variablen ersetzt (air-gapped-Build).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tsconfig.json

@@ -0,0 +1,26 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "lib": ["dom", "dom.iterable", "esnext"],
+    "allowJs": true,
+    "skipLibCheck": true,
+    "strict": true,
+    "noUncheckedIndexedAccess": true,
+    "noImplicitOverride": true,
+    "noEmit": true,
+    "esModuleInterop": true,
+    "module": "esnext",
+    "moduleResolution": "bundler",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "jsx": "preserve",
+    "incremental": true,
+    "verbatimModuleSyntax": false,
+    "plugins": [{ "name": "next" }],
+    "paths": {
+      "@/*": ["./src/*"]
+    }
+  },
+  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
+  "exclude": ["node_modules"]
+}