pi-fold 4.2.4

pi-fold 4.2.4

Patch release.

• The chat mirrors the model's window. Each fold the model holds collapsed is one row in Pi's chat, and its messages return in place when the model expands it. Pi only clears its chat on native compaction, which pi-fold replaces, so a long folded session no longer keeps every message on screen.
• The fold bar reads Pi's context usage on the same key Pi's footer uses, instead of re-reading it on every frame. One reading rebuilds the whole session projection, about 29 ms on a 16,000-entry session.

No new options, and no change to what folds or when.