The two CJK-aware drop-ins (divide_line for Rich/textual.content, and
compute_wrap_offsets for textual._wrap/_wrapped_document) shared
identical greedy-pack-then-fold core logic, written twice. Extract into
_fold_chunk_cells so each call site only handles interface shape (Rich
words vs Textual chunk regex, tab handling).
Also extend the patch to cover textual._wrap.compute_wrap_offsets and
textual.document._wrapped_document — the TextArea / Static-via-Content
paths use compute_wrap_offsets, not divide_line, so the prior patch
missed input-box and user-bubble wrap. Drop try/except defensiveness
around the Textual patch (we target latest Textual; let real breakage
surface), split _CJK_WRAP_RE into commented sub-ranges, prune WHAT
comments.
Verified: non-CJK output remains byte-equivalent to upstream across
both divide_line and compute_wrap_offsets fixture sets; live render at
width 60 packs the first line to ~98% utilization on input box, USER
bubble, and AGENT bubble.
yanghang
e2c4649a85
