0.6.18

Fixed

• Black screen after updating from a source checkout, and the app now reports a
  failed relaunch instead of disappearing silently.
• Source updates no longer rebuild when the pull brought nothing.
• media:// no longer serves settings.json or session cookies to the
  renderer.
• Concurrent project saves could lose edits. Writes are now serialised.
• Every OpenAI request has a per-attempt timeout, so a hung connection no
  longer stalls the pipeline indefinitely.