- Parent menu now has submenu with "All" and top 4 file-type actions
- Actions honor new Options: default action (download/copy) and include metadata in All
- Build submenu on open by collecting links; exclude meta from top-types
- Handle actions: copy to clipboard or send to aria2 using saved settings
- Content script: base href check via absolute URL; scope to listing container
- Popup: fallback to background-assisted collection when no receiver exists
- Background: expose collect.fromTab to run injection + collection
- Add debug logging for visibility
Ensure the content script is present by injecting it if no receiver exists,
then retry collection. Add debug logs and a badge/title update for feedback.