feat: Implement voice and video calling features including participant tiles, screen sharing, and audio controls with associated UI components and sound assets.

packages/shared/src/index.css

@@ -367,6 +367,11 @@ body {
   word-wrap: break-word;
 }
 
+.message-content img {
+  max-width: 100%;
+  height: auto;
+}
+
 /* Markdown Styles Tweaks */
 .message-content strong {
   font-weight: 700;
@@ -3371,6 +3376,21 @@ body {
     width: calc(100vw - 32px);
   }
 
+  /* Constrain images/videos/embeds in messages to fit mobile width */
+  .message-content img,
+  .message-content video {
+    max-width: 100%;
+    height: auto;
+  }
+
+  .link-preview {
+    max-width: 100%;
+  }
+
+  .youtube-video-wrapper {
+    max-width: 100%;
+  }
+
   /* Chat container takes full width */
   .is-mobile .chat-container {
     width: 100%;