feat: rename to Drucken, 86 image sizes, fix the distorted crop editor

The crop frame had width:100% together with max-height, so the height was
clamped while the width stayed - the frame lost the target aspect ratio and
object-fit:fill stretched the picture into it. Measured at 390px: frame 0.843
instead of 0.778, picture 8.3% too wide. The width now follows from the allowed
height and the ratio, and the image carries its own aspect-ratio instead of a
second percentage, so it cannot stretch at all.

Dragging was fine but felt dead: at fill zoom the crop sits at the stop in one
axis. The editor now states which way it can move, double-tap zooms, arrow keys
nudge, and the zoom slider shows its factor.

Sizes: 41 -> 86 in ten groups, including US inch sizes, instant-film picture
areas, cards, DIN A0-A7 and eleven aspect ratios as physical sizes.

The tab is called Drucken now; /druck and /passbilder redirect there.

package-lock.json

@@ -32,6 +32,7 @@
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@@ -6366,6 +6367,53 @@
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