- Decode images in background goroutine, not in Draw()
- Show [loading image...] placeholder until decode completes
- Skip pv.term.Draw() when composite is active (pager got no input)
- Thread-safe access to decoded image cache via sync.Mutex
- Invalidate callback triggers redraw when images finish decoding
Composite mode now handles j/k/g/G/PgUp/PgDown/mouse wheel for scrolling.
Text uses the configured default style. Images render inline via Vaxis.
Emails without images still use the standard pager path.
The composite renderer bypassed the pager (less) for any email with images,
losing colors, scrolling, and search. Now always forward to the pager with
[image: alt] text placeholders. Image refs are still extracted and stored
for future inline rendering.
Mortdecai