0.1.13 — clipped-trailer save fix + preset body-slider validation

Fixes the "This save has an unrecognized trailer" refusal reported on 0.1.11.

0.1.13 — supports another save-trailer shape reported from the wild (the GVAS end-of-file magic clipped to its first 1–3 bytes at the aligned end of file — two independent reports, a lone G and a GV), which made saving refuse with "This save has an unrecognized trailer" on affected saves. Also extends preset validation to body sliders: applying a Look now skips body morph weights outside the character creator's -1..1 span (an extrapolated morph warps the mesh — e.g. an out-of-range Chest pinches the neck) and skips any preset MeshScale that isn't exactly 1.0, so a shared look can't re-introduce the global body-scale bug. The slider ranges are now a single source shared by the UI and that validation. Adds a window icon.

0.1.12 — fixes the same refusal when saving a length-changing edit (rename, voice, gender) on saves whose trailer is plain zero padding with no GVAS footer. Also hardens preset loading: applying a Look now validates part ids against the character creator's real sets, so a shared or hand-edited preset carrying an id the game has no part for (e.g. an NPC hair) can no longer be written into your save.

If 0.1.11 refused to save with the trailer diagnostic, this build handles your save. Nothing was ever written by the refusal — your save is fine.