Hojun-Cho
d053560b80
Three shapes handled: value-struct chains (&o.i.a), pointer-field (&p.f), slice/str pseudo-fields (&s.len). cstage inlines #6's spine walker; wwstage reuses dotchainresolve unchanged. Silent-drop fallback preserved. Slice-header width mismatch in *&s.len writes filed as task #13.