fix: prevent My Apps crash when installing apps + add filebrowser to demo

The My Apps page went blank after installing apps because pkg['static-files'].icon
was accessed without optional chaining on dynamically installed packages that lack
the static-files property.

- Make static-files optional in PackageDataEntry type
- Add defensive ?.icon access with fallback in Apps.vue and AppDetails.vue
- Add filebrowser to mock backend staticDevApps (enables Cloud page in demo)
- Expand portMappings and marketplaceMetadata for all marketplace apps
- installPackage now uses staticApp() format for consistent data shape

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

neode-ui/src/components/OnlineStatusPill.vue

@@ -3,7 +3,7 @@
     type="button"
     data-controller-ignore
     class="w-full flex items-center gap-2 text-white/80 hover:text-white transition-colors"
-    title="Open CLI (⌘C / Ctrl+C)"
+    title="Open CLI (F)"
     @click="openCLI"
   >
     <div class="relative shrink-0">