change repair_tool application and add beams for salvager and repair_tool

src/lib/ecs/system/RepairSystem.h

@@ -1,17 +1,36 @@
 #pragma once
 
+#include <vector>
+
+#include "BeamFiredEvent.h"
+#include "Tick.h"
+
+#include "entt/entity/entity.hpp"
+
 class EntityAdmin;
 
-// World-mutation system for repair modules: validates each tool's target (set by
-// RepairExecutor), falls back to the nearest damaged friendly in range, and
-// applies healing. Runs every tick, independent of behavior selection.
+// World-mutation system for repair modules: each tool runs a cycle on its own
+// cooldown. When a cycle starts it picks a target (the RepairExecutor-set target,
+// else the nearest damaged friendly in range), emits a repair beam, and schedules
+// the heal for mid-beam (kBeamImpactDelayTicks later) — mirroring weapon firing.
+// Runs every tick, independent of behavior selection.
 class RepairSystem
 {
 public:
     explicit RepairSystem(EntityAdmin& admin);
 
-    void tick();
+    void tick(Tick currentTick, std::vector<BeamFiredEvent>& outBeamFiredEvents);
 
 private:
-    EntityAdmin& m_admin;
+    struct PendingHeal
+    {
+        entt::entity target;
+        float        amountHp;
+        Tick         appliesAt;
+    };
+
+    void applyPendingHeals(Tick currentTick);
+
+    EntityAdmin&             m_admin;
+    std::vector<PendingHeal> m_pendingHeals;
 };