Fix double audio playback and add UID handling for personal stream

- Fixed double playback issue on stream page by properly scoping event delegation in streams-ui.js
- Added init-personal-stream.js to handle UID for personal stream playback
- Improved error handling and logging for audio playback
- Added proper event propagation control to prevent duplicate event handling

static/css/layout/header.css

@@ -81,7 +81,7 @@ header {
 .nav-link:focus {
   background: rgba(255, 255, 255, 0.1);
   text-decoration: none;
-  color: #fff;
+  color: var(--text-color);
 }
 
 /* Active navigation item */