feat: Add trip cloning from past voyages, PWA manifest, and batch pack/share actions

public/manifest.webmanifest

@@ -0,0 +1,17 @@
+{
+  "name": "LOADOUT // Travel Manifest & Bag Allocation",
+  "short_name": "Loadout",
+  "start_url": "/",
+  "display": "standalone",
+  "background_color": "#F4F1EA",
+  "theme_color": "#141518",
+  "description": "Tactile travel packing manifest and luggage allocation system.",
+  "icons": [
+    {
+      "src": "/icon.svg",
+      "sizes": "64x64",
+      "type": "image/svg+xml",
+      "purpose": "any maskable"
+    }
+  ]
+}