f646a29d1a
- Add renderCollapsibleHeader() to renderer-registry - Places chevron on right, spinner on left - Toggles between ChevronRight (collapsed) and ChevronDown (expanded) - Uses max-h-0/max-h-[2000px] with transition-all for smooth animation - Dynamically adds/removes mt-3 to avoid margin when collapsed - Update javascript-repl renderer to use collapsible sections - Code and console output hidden by default - Only file attachments remain visible - 300ms smooth animation on expand/collapse - Export renderCollapsibleHeader from web-ui index