change repair_tool application and add beams for salvager and repair_tool

src/lib/ecs/system/SalvagerSystem.h

@@ -1,19 +1,39 @@
 #pragma once
 
+#include <vector>
+
+#include "BeamFiredEvent.h"
+#include "Tick.h"
+
+#include "entt/entity/entity.hpp"
+
 class BuildingSystem;
 class EntityAdmin;
 class ScrapSystem;
 
-// World-mutation system for salvage modules: collects scrap into cargo and
-// delivers full cargo at a SalvageBay. Runs every tick, independent of which
-// behavior the AiSystem selected.
+// World-mutation system for salvage modules: each module runs a collection cycle
+// on its own cooldown. When a cycle starts it emits a salvage beam toward an
+// in-range scrap pile and schedules the collection of one scrap for mid-beam
+// (kBeamImpactDelayTicks later) — mirroring weapon firing. Also delivers full
+// cargo at a SalvageBay. Runs every tick, independent of behavior selection.
 class SalvagerSystem
 {
 public:
     explicit SalvagerSystem(EntityAdmin& admin);
 
-    void tick(ScrapSystem& scraps, BuildingSystem& buildings);
+    void tick(Tick currentTick, ScrapSystem& scraps, BuildingSystem& buildings,
+              std::vector<BeamFiredEvent>& outBeamFiredEvents);
 
 private:
-    EntityAdmin& m_admin;
+    struct PendingCollection
+    {
+        entt::entity module;
+        entt::entity scrap;
+        Tick         appliesAt;
+    };
+
+    void applyPendingCollections(Tick currentTick, ScrapSystem& scraps);
+
+    EntityAdmin&                   m_admin;
+    std::vector<PendingCollection> m_pendingCollections;
 };