Jonas Reith
1358e81426
Weather is integrated and path-dependent, so reversing it can only restore recorded snapshots -- and a save held only the current moment, so after a load there was no past to step back to and loaded storms froze on backward step. Save bumped to v12: it now appends the most recent wxSaveMax(40) step-back frames (each = humidity/cloud/rain + storms + RNG) after the planet state. loadGame restores them (and still drops any stale pre-load history), so after a load you can step backward ~40 steps and the storms reverse along their saved track. Pre-v12 saves load with no step-back history (you can still step forward then back). Adds ~10 MB to a save (the user chose the short window). All five suites pass; GUI build clean. Docs updated. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>