v1.4.3.0 — Map-aware materials, map report, free dump height

Live-tested by Tommy on the 243 Quarry map and RGC Yukon Back Country V2.

The mod now knows what your map can do. On map load it checks every material against the running session — is it registered, does it have a ground slot? The layer editor only offers what your map actually provides, and anything you can dig and sell but not dump back onto the ground is marked (!) with the reason spelled out. A map report on the Mining Layers page tells you where you stand, starting with what works.

Why this matters: FS25 allows only 63 materials that can lie on the ground, and the base game alone uses 48 of them. Map and mods share the remaining 15 — whoever loads first wins. That is not something any mod can change, but from now on you can see it instead of guessing. Rule of thumb: fewer mods = more free slots = more materials you can dump.

Fixed

• Custom ground textures survived the editor — now they really do. Saving in the layer editor silently discarded any hand-set paintLayer. Cause found and fixed.
• Dumping no longer refused just because the bucket sits low. TerraFarm blocks ground-dumping when terrain is within ~0.5 m below the bucket edge. That check is now lifted — dumping works at any height. Materials without a ground slot are still refused honestly by the game, with a log line naming the material, instead of silently dropping 0 litres. freeDumpHeight="false" in miningLayers.xml restores the original behaviour.
• The pay seam no longer falls back to PAYDIRT blindly — it picks the next usable material from your map's own pool. On maps without PAYDIRT this used to produce a pit with no seam at all.
• Layers whose material is unknown on the current map are kept, not dropped. Taking a savegame to a different map no longer clears your configuration.

Thanks to @TacticalOreo and the RGC crew for the logs and the persistence — most of this release came out of that.