fix: Quantity expand + PlatformIndex 映射修正

- ApplyDefensePlan 展开 EquipmentDeployment.Quantity → 多个 FireUnit
- Planner 分配后用 fireUnits.IndexOf 修正 PlatformIndex
- 新增 FullPipeline_Piston_VerifiesRoundAllocation 验证 ≥8 发
- Piston 集成测试加入计划大小断言

src/CounterDrone.Core/Algorithms/DefaultDefensePlanner.cs

@@ -141,6 +141,11 @@ namespace CounterDrone.Core.Algorithms
 
                 foreach (var (unit, rounds, fireEvents) in assignedUnits)
                 {
+                    // 平台索引 = 该单元在 fireUnits 列表中的位置
+                    int platIndex = fireUnits.IndexOf(unit);
+                    // 修正 FireEvent 的平台索引
+                    foreach (var fe in fireEvents) fe.PlatformIndex = platIndex;
+
                     plan.Assignments.Add(new UnitAssignment
                     {
                         FireUnitId = unit.Id,
@@ -405,7 +410,7 @@ namespace CounterDrone.Core.Algorithms
                 events.Add(new FireEvent
                 {
                     FireTime = fireTime,
-                    PlatformIndex = i % rounds,
+                    PlatformIndex = 0,  // 由调用方在分配后覆盖为正确索引
                     TargetX = tx,
                     TargetY = mid.Y,
                     TargetZ = tz,

test/unit/CounterDrone.Core.Tests/DefensePlannerTests.cs

@@ -427,5 +427,24 @@ namespace CounterDrone.Core.Tests
                 Assert.True(fe.FireTime < arrivalTime,
                     $"FireTime={fe.FireTime:F0} >= ArrivalTime={arrivalTime:F0}"));
         }
+        [Fact]
+        public void FullPipeline_Piston_VerifiesRoundAllocation()
+        {
+            var units = MakeGroundUnits(8);
+            var threat = MakeThreat(PowerType.Piston, 200); // 集成测试同参数——速度设为 200
+            threat.Waypoints.Clear();
+            threat.Waypoints.Add(new Waypoint { PosX = 0, PosY = 500, PosZ = 0, Speed = 200 });
+            threat.Waypoints.Add(new Waypoint { PosX = 20000, PosY = 500, PosZ = 0, Speed = 200 });
+            var planner = new DefaultDefensePlanner(TestAmmo);
+            var result = planner.Plan(units, new() { threat }, new CombatScene { WindSpeed = 3 });
+
+            Assert.True(result.Best.ThreatsEngaged == 1);
+            Assert.True(result.Best.MergedSchedule.Count >= 8,
+                $"只有 {result.Best.MergedSchedule.Count} 发，集成测试场景应>=8发");
+            // 验证 PlatformIndex 有效
+            Assert.All(result.Best.MergedSchedule, fe =>
+                Assert.True(fe.PlatformIndex >= 0 && fe.PlatformIndex < units.Count,
+                    $"PlatformIndex={fe.PlatformIndex} out of [0,{units.Count})"));
+        }
     }
 }

test/unit/CounterDrone.Core.Tests/FullPipelineTests.cs

@@ -88,18 +88,22 @@ namespace CounterDrone.Core.Tests
             var idx = 0;
             foreach (var eq in detail.Equipment.Where(e => e.EquipmentRole == (int)EquipmentRole.LaunchPlatform))
             {
-                fireUnits.Add(new FireUnit
+                int qty = Math.Max(1, eq.Quantity);
+                for (int i = 0; i < qty; i++)
                 {
-                    Id = $"u{idx++}",
-                    Type = platType,
-                    Position = new Vector3((float)eq.PositionX, (float)eq.PositionY, (float)eq.PositionZ),
-                    CruiseSpeed = (float)(eq.CruiseSpeed ?? 55f),
-                    ReleaseAltitude = (float)(eq.ReleaseAltitude ?? 0f),
-                    MuzzleVelocity = (float)(eq.MuzzleVelocity ?? 800f),
-                    TotalMunitions = eq.MunitionCount ?? 1,
-                    AmmoTypes = new List<AerosolType> { (AerosolType)(eq.AerosolType ?? 0) },
-                    Cooldown = (float)eq.Cooldown,
-                });
+                    fireUnits.Add(new FireUnit
+                    {
+                        Id = $"u{idx++}",
+                        Type = platType,
+                        Position = new Vector3((float)eq.PositionX + i * 50, (float)eq.PositionY, (float)eq.PositionZ),
+                        CruiseSpeed = (float)(eq.CruiseSpeed ?? 55f),
+                        ReleaseAltitude = (float)(eq.ReleaseAltitude ?? 0f),
+                        MuzzleVelocity = (float)(eq.MuzzleVelocity ?? 800f),
+                        TotalMunitions = eq.MunitionCount ?? 1,
+                        AmmoTypes = new List<AerosolType> { (AerosolType)(eq.AerosolType ?? 0) },
+                        Cooldown = (float)eq.Cooldown,
+                    });
+                }
             }
 
             // 如果没装备，生成默认的地面单元
@@ -298,6 +302,8 @@ namespace CounterDrone.Core.Tests
             var plan = ApplyDefensePlan();
             Assert.True(plan.ThreatsEngaged > 0);
             Assert.NotEmpty(plan.MergedSchedule);
+            Assert.True(plan.MergedSchedule.Count >= 8,
+                $"Piston Planner 只生成了 {plan.MergedSchedule.Count} 发，预期 >= 8");
 
             var eng = RunSimulation(8000);