cargo component refactoring

src/lib/ecs/component/SalvagerComponent.h

@@ -0,0 +1,11 @@
+#pragma once
+
+// Per-instance salvage collection emitter. Each placed salvage module owns one of
+// these and runs its own collection cycle on its own cooldown. The collected scrap
+// is stored in the owning ship's shared CargoComponent (REQ-SHP-SALVAGE), not here.
+struct SalvagerComponent
+{
+    float collectionRange_tiles;
+    int   collectionIntervalTicks;
+    int   cooldownTicksRemaining;
+};