feat(web): Projektgerüst, Router, Grundlayout

Vite + TypeScript ohne UI-Framework in web/, exakte Versionen, History-Router
(matchRoute, navigate, startRouter mit Cleanup, a[data-link], popstate),
Grundlayout mit Kopfzeile, Fußzeile und Platzhalterseiten.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/package.json

@@ -0,0 +1,21 @@
+{
+  "name": "aircard-web",
+  "private": true,
+  "version": "0.1.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc --noEmit && vite build",
+    "test": "vitest run",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@fontsource-variable/nunito-sans": "5.3.0"
+  },
+  "devDependencies": {
+    "happy-dom": "20.14.5",
+    "typescript": "6.0.3",
+    "vite": "8.3.2",
+    "vitest": "5.0.3"
+  }
+}