Signal and Chat photos open in an in-app viewer (X, tap outside, Escape or Back to return to the chat)

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

public/index.html

@@ -97,6 +97,7 @@
 <script defer src="/signal-view.js"></script>
 <script defer src="/chat-view.js"></script>
 <script defer src="/chat-extras.js"></script>
+<script defer src="/image-viewer.js"></script>
 <script defer src="/notes-view.js"></script>
 <script defer src="/chores-view.js"></script>
 <script defer src="/family-view.js"></script>