feat: implement lazy loading for hls.js and enhance video player initialization

CHANGELOG.md

@@ -19,6 +19,7 @@
 - Updated chat runtime image to include ffmpeg/ffprobe for media duration probing on upload.
 - Rebuilt viewer, admin, and admin-login pages around custom semantic class structures with accessibility-focused landmarks, tab semantics, and keyboard-focus behavior.
 - Replaced legacy and Tailwind-based stylesheet rules with a custom design-token CSS system covering responsive layouts, forms, tables, and reduced-motion behavior.
+- Code-split `hls.js` via lazy loading in the viewer bootstrap to shrink the main frontend bundle and isolate stream playback logic into a dedicated chunk.
 
 ### Fixed