Atomically Copy and Truncate a Log File on Linux

The tilt handler was never the problem. A 3D parent plane hides half of the rotated card from the pointer, and four small CSS changes fix it.

Language splits, string concatenation and plural forms all fail silently outside English. These are the choices we made so our 17-language picker holds up.

A hardcoded line count leaves stray rows on screen once text wraps. Here is how to count the rows the terminal really used, and the cases where that count still lies.