iPad and Screen Time helper; v2.0 roadmap

- Admin screen: the simple Screen Time setup, the web addresses the app needs, addresses devices were seen reaching, and a Check this device test
- Report-only Content-Security-Policy so devices report any other address a page loads (nothing is blocked)
- Pictures from other sites pass through the hub (/api/img): podcast search covers, Plex Home pictures, a VBV cover, search answers
- docs/v2-roadmap.md: the family-first 2.0 plan, with Family Chat (text only) and no photos or calls

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

public/index.html

@@ -60,6 +60,7 @@
 <script src="/file-history.js"></script>
 <script src="/music-extras.js"></script>
 <script src="/music-more.js"></script>
+<script src="/screentime-view.js"></script>
 <script src="/calendar-views.js"></script>
 <script src="/app.js"></script>
 <script src="/search-view.js"></script>