v0.9.39

0.9.39

• fix: On Windows a save no longer gets lost when another program briefly holds the file. Windows refuses to replace a file while something else has it open, and that happens routinely there — the virus scanner inspects every freshly written file, so a save could collide with the scan of the one before it. The app now waits a moment and tries again instead of dropping the write; previously a pane's terminal history could quietly fail to be stored and the next launch would bring back an older state
• change: Every message the window sends to the app's core is now checked for where it came from. Only the app's own window is meant to reach file and terminal operations, and only it can — but nothing verified that, so a later change could have opened the door without anyone noticing. The rule is now enforced rather than assumed
• change: The image library used to generate the app icons was updated to a release without known vulnerabilities, and two build-time libraries were pinned to their patched versions. None of this ships inside the app — it is the toolchain that builds it. The icons themselves are unchanged, pixel for pixel