pi-fold 4.2.6

pi-fold 4.2.6

Patch release.

• Pi's system messages stay out of the window before the first context event. Pi never shows extensions its system-prompt messages, but /fold and /fold-editor run right after a restart used a view that included them, so folds crossing a system-prompt change looked broken and a commit could drop most of a session's folds. That view now leaves them out, and a fold that already contains one still holds.
• A compaction check before the first context event no longer stops folding. After failed retries Pi estimates the whole raw transcript and may try to compact before pi-fold has seen any context; pi-fold used to suspend folding and let native compaction run, which could exhaust memory on a large session. That compaction is now blocked and folding stays on.

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