pub const DISPLAY_CAP: usize = SMALL_THRESHOLD; // 4_096usizeExpand description
Total byte budget for the display slice of a bounded (Content/Unknown) output.
Defined as SMALL_THRESHOLD so the invariant “we never display more bytes
than the passthrough budget” is compiler-enforced rather than maintained
by convention. Split 60 % head / 40 % tail, mirroring smart_truncate’s
ratio.