Phosphene 4.19.17 - fewer crashes when a video starts, clearer messages

A bug-fix release, free for everyone. In Pinokio, press Update, then restart Phosphene.

Fewer "the graphics chip took too long" crashes at the start of an LTX video, mostly on 16 GB Macs and Macs with the models on a slower disk. Clips look the same and take no longer.
Training no longer stops with "exited with code 1" when its model files are not downloaded yet: Start tells you what is missing and offers Download all. A failed run now shows the trainer's own reason.
Image renders: a LoRA that is no longer on your Mac, a FLUX.2 LoRA made for a different FLUX.2 size, too many reference images, or too little disk space now get a plain message before the render starts, instead of failing halfway.
After your fifth finished render, a small card asks once if you would star Phosphene on GitHub. Whatever you click, it never comes back.

Thanks to everyone whose error reports pointed at these.

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