docs: 更新对接文档 V1.4，同步实体属性变更

- 事件示例：cloud.Dispersion.Center → cloud.PosX/Y/Z, cloud.Radius
- API 列表：新增 Platforms 访问
- 新增 EntitySnapshot 字段文档（VelX/Y/Z）
- 新增实体属性速查表（所有 5 种实体）
- 测试状态更新：243 测试 9 秒全部通过
- Unity 脚本同步更新

docs/对接文档_Unity前端.md

@@ -1,7 +1,7 @@
 # 后端对接文档（Unity 前端）
 
-> **版本**：V1.3  
-> **日期**：2026-06-15  
+> **版本**：V1.4  
+> **日期**：2026-06-17  
 > **Unity 版本**：2022.3.62f3c1  
 
 ---
@@ -60,7 +60,7 @@ runner.Engine.TimeScale = 4f;  // 加速
 
 // 订阅事件
 runner.Engine.OnMunitionLaunched += m => Instantiate(shellPrefab, ToVector3(m.PosX, m.PosY, m.PosZ));
-runner.Engine.OnCloudGenerated   += c => SpawnCloud(c.Dispersion.Center, c.Dispersion.Radius);
+runner.Engine.OnCloudGenerated   += c => SpawnCloud(c.PosX, c.PosY, c.PosZ, c.Radius);
 runner.Engine.OnDroneDestroyed   += d => PlayExplosion(d.PosX, d.PosY, d.PosZ);
 runner.Engine.OnTargetDetected += (d, det) => ShowDetectionMark(d.PosX, d.PosY, d.PosZ);
 runner.Engine.OnDroneReachedTarget += d => ShowReached(d.PosX, d.PosY, d.PosZ);
@@ -132,7 +132,7 @@ var runner = GetComponent<SimulationRunner>();
 runner.Engine.SetFireSchedule(fireEvents);  // 从推荐方案取
 runner.LoadAndStart(taskId);
 runner.Engine.TimeScale = 4f;
-runner.Engine.State / Drones / Clouds / Munitions / DetectionEntities / Events
+runner.Engine.State / Drones / Clouds / Munitions / Platforms / DetectionEntities / Events
 runner.Stop();
 ```
 
@@ -155,6 +155,32 @@ replay.LoadReplay(taskId);
 // replay.TotalFrames / replay.GetFrame(frameIndex)
 ```
 
+### EntitySnapshot（每帧推送）
+
+| 字段 | 类型 | 说明 |
+|------|------|------|
+| `EntityId` | string | 实体唯一 ID |
+| `EntityType` | enum | Drone/Platform/Munition/Cloud/DetectionEquip |
+| `PosX/Y/Z` | float | 三维位置 |
+| `VelX/Y/Z` | float | 瞬时速度 (m/s) |
+| `Hp` | float | 无人机血量 (0~1) |
+| `DamageStage` | int | 损伤阶段 (0~N) |
+| `PlatformStateStr` | string | 平台状态 (Idle/FlyingToTarget/ReadyToRelease) |
+| `CloudRadius` | float | 云团有效半径 |
+| `CloudOpacity` | float | 云团不透明度 (0~1) |
+| `CloudPhase` | int | 云团扩散阶段 (1/2/3) |
+| `CloudElapsed` | float | 云团已存在时间 (s) |
+
+### 实体属性（直接访问）
+
+| 实体 | 关键属性 |
+|------|------|
+| **DroneEntity** | Id, PosX/Y/Z, Hp, Status, ExposureTime, TargetType, PowerType, Wingspan, CruiseSpeed, Route, TraveledArc, TotalArc, Progress |
+| **CloudEntity** | Id, PosX/Y/Z, Radius, Density, Phase, Elapsed, IsDissipated, AerosolType |
+| **MunitionEntity** | Id, PosX/Y/Z, Velocity, StartX/Y/Z, LaunchTime, ElapsedTime, LaunchAngle, Azimuth, MuzzleVelocity, FlightDuration, TargetX/Y/Z, ReleaseAltitude, HasArrived |
+| **PlatformEntity** | Id, PosX/Y/Z, CurrentVelocity, State, MunitionCount, Cooldown, MuzzleVelocity, CruiseSpeed, ReleaseAltitude, TargetX/Y/Z, FlightDistance |
+| **DetectionEntity** | Id, PosX/Y/Z, Source, IsInRange(), IsDetected() |
+
 ---
 
 ## 五、默认数据
@@ -201,4 +227,4 @@ dotnet publish -c Release -o ../../unity_plugins
 | 实体事件映射 | `docs/design/technical/仿真器实体与事件映射.md` |
 | 任务跟踪 | `docs/implementation/tasks/实施计划与任务跟踪.md` |
 | 测试报告 | `test/reports/`（每次集成测试自动生成） |
-| 测试状态 | **191 测试，24 秒（集成）** |
+| 测试状态 | **243 测试，9 秒（全部通过）** |

src/Unity/Assets/Scripts/Managers/SimulationRunner.cs

@@ -92,12 +92,11 @@ namespace CounterDrone.Unity
             {
                 if (!_clouds.ContainsKey(cloud.Id))
                 {
-                    var pos = new UVector3(cloud.Dispersion.Center.X, cloud.Dispersion.Center.Y, cloud.Dispersion.Center.Z);
+                    var pos = new UVector3(cloud.PosX, cloud.PosY, cloud.PosZ);
                     var prefab = _cloudPrefab != null ? _cloudPrefab : GameObject.CreatePrimitive(PrimitiveType.Sphere);
                     var go = Instantiate(prefab, pos, Quaternion.identity);
                     go.name = cloud.Id;
-                    float r = cloud.Dispersion.Radius;
-                    go.transform.localScale = UVector3.one * r;
+                    go.transform.localScale = UVector3.one * cloud.Radius;
                     var mat = go.GetComponent<Renderer>().material;
                     mat.color = new Color(1, 0, 0, 0.3f);
                     _clouds[cloud.Id] = go;