Leaving a mechanical camera shutter cocked for short or moderate periods is generally not a big concern. Based on the community replies, photographers have found that cameras often sit cocked without problems, and some film cameras are designed to remain cocked between shots.

In general, spring wear comes more from repeated cycling than simply being held under tension. So leaving it cocked overnight, or even for longer, is unlikely to suddenly make the shutter inaccurate.

That said, as a good habit, if you know the camera is going into long-term storage, it makes sense to fire the shutter so the mechanism is left at rest. But if you forget and leave it cocked, it’s usually not something to worry about.

So for a Minolta SRT-101: overnight is fine, and a week is unlikely to cause harm. For storage, uncocked is preferable, but occasional extended cocking is generally no big deal.