feat(ui): build responsive cookbook, editor and persistent cooking assistant

public/manifest.webmanifest

@@ -0,0 +1,21 @@
+{
+  "id": "/",
+  "name": "HamHam – Dein persönliches Kochbuch",
+  "short_name": "HamHam",
+  "description": "Lieblingsrezepte sammeln und entspannt kochen.",
+  "lang": "de",
+  "start_url": "/",
+  "scope": "/",
+  "display": "standalone",
+  "background_color": "#faf8f4",
+  "theme_color": "#365747",
+  "icons": [
+    { "src": "/icons/icon-192.png", "sizes": "192x192", "type": "image/png", "purpose": "any" },
+    {
+      "src": "/icons/icon-512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "any maskable"
+    }
+  ]
+}