A focused update with some quality-of-life improvements and a proper balance pass.
📊 Silo progress bar — The silo now shows a small vertical fill indicator right on the building, so you can tell at a glance how full it is without selecting it. Turns red and flashes FULL when it's time to sell.
⚙️ Parts on Level 5 upgrades — Harvester and tractor Level 5 upgrades now cost Parts instead of money. Early machines are cheap (3–5 parts), so you can feel the power of Parts almost immediately after unlocking them at 350 Farm Power. Scales up from there for the big iron.
🛠️ Bug fixes — Fixed a sneaky bug affecting idle profit calculations, and resolved an issue where Global Exchange prices weren't refreshing correctly.