Update PWA manifest and service worker to force iPhone refresh

- Updated manifest.json version to 1.0.1 and description
- Bumped service worker cache version from v6 to v7
- Forces PWA refresh on iPhone Safari to pick up latest changes

public/manifest.json

@@ -1,7 +1,8 @@
 {
   "name": "Ultimate Lists",
   "short_name": "Lists",
-  "description": "The ultimate todo list app with advanced task management",
+  "description": "The ultimate todo list app with advanced task management and continuous task input",
+  "version": "1.0.1",
   "start_url": "/",
   "scope": "/",
   "display": "standalone",