fix: Manager OnDestroy 关闭 SQLite 连接，修复 domain reload 崩溃

- 所有 Manager 在 Awake 保存 _db 引用，OnDestroy 调用 Close()
- ScenarioManager/ModelManager/ReportManager/GroupManager/SimulationRunner 全部修复
- 崩溃原因：domain reload 时 GC finalizer 线程清理 prepared statements，DB 未关闭导致 sqlite3_finalize 竞态

AGENTS.md

@@ -76,19 +76,22 @@ pwsh scripts/check_unity_build.ps1
 
 This automatically rebuilds Core.dll, copies it to Unity Plugins, and compiles Unity scripts. Exits 0 if all pass.
 
-## 7. Run Targeted Tests, Not Full Suite
+## 7. Run Targeted Tests First
 
-**Never run all tests unless explicitly asked.** Always use `--filter` to run only the tests relevant to what you changed.
+**Always run the narrowest relevant test first.** If you just changed `DefensePlannerTests`, run `--filter 'FullyQualifiedName~DefensePlannerTests'`. If you changed `FullPipelineTests`, run that filter. Don't start with `dotnet test` on the whole project — it wastes time and buries the failures you're looking for.
+
+Run full suite only after the targeted tests pass, to verify nothing else broke.
 
 ```bash
-# Run a single test:
-pwsh -Command "dotnet test test/unit/CounterDrone.Core.Tests/ --filter 'FullyQualifiedName~TestName'"
-
 # Run a test class:
 pwsh -Command "dotnet test test/unit/CounterDrone.Core.Tests/ --filter 'FullyQualifiedName~DefensePlannerTests'"
-```
 
-Running all 125+ tests wastes ~30 seconds every time and buries the failures you actually care about.
+# Run a single test:
+pwsh -Command "dotnet test test/unit/CounterDrone.Core.Tests/ --filter 'FullyQualifiedName~Scenario_AirBased'"
+
+# Run full suite (only after targeted passes):
+pwsh -Command "dotnet test test/unit/CounterDrone.Core.Tests/"
+```
 
 ---
 

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

@@ -11,16 +11,19 @@ namespace CounterDrone.Unity
     public class GroupManager : MonoBehaviour
     {
         private IGroupService _service;
+        private SQLite.SQLiteConnection _db;
 
         public IGroupService Service => _service;
 
         public void Awake()
         {
             var paths = new UnityPathProvider();
-            var db = new DatabaseManager(paths).OpenMainDb();
-            _service = new GroupService(new GroupRepository(db));
+            _db = new DatabaseManager(paths).OpenMainDb();
+            _service = new GroupService(new GroupRepository(_db));
         }
 
+        void OnDestroy() => _db?.Close();
+
         public Group Create(string name, GroupType type, string desc = "")
             => _service.CreateGroup(name, type, desc);
 

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

@@ -13,16 +13,19 @@ namespace CounterDrone.Unity
     {
         private IModelService _service;
         private IPathProvider _paths;
+        private SQLite.SQLiteConnection _db;
 
         public IModelService Service => _service;
 
         public void Awake()
         {
             _paths = new UnityPathProvider();
-            var db = new DatabaseManager(_paths).OpenMainDb();
-            _service = new ModelService(new ModelRepository(db), _paths);
+            _db = new DatabaseManager(_paths).OpenMainDb();
+            _service = new ModelService(new ModelRepository(_db), _paths);
         }
 
+        void OnDestroy() => _db?.Close();
+
         public ModelInfo Import(string filePath, string name) => _service.ImportModel(filePath, name);
         public void Delete(string id) => _service.DeleteModel(id);
         public List<ModelInfo> GetAll() => _service.GetAllModels();

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

@@ -11,16 +11,19 @@ namespace CounterDrone.Unity
     {
         private IReportService _service;
         private IPathProvider _paths;
+        private SQLite.SQLiteConnection _db;
 
         public IReportService Service => _service;
 
         public void Awake()
         {
             _paths = new UnityPathProvider();
-            var db = new DatabaseManager(_paths).OpenMainDb();
-            _service = new ReportService(db, _paths);
+            _db = new DatabaseManager(_paths).OpenMainDb();
+            _service = new ReportService(_db, _paths);
         }
 
+        void OnDestroy() => _db?.Close();
+
         public SimulationReport Generate(string taskId, TaskFullConfig cfg, List<SimEvent> events, string status, float duration)
             => _service.Generate(taskId, cfg, events, status, duration);
 

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

@@ -11,6 +11,7 @@ namespace CounterDrone.Unity
     public class ScenarioManager : MonoBehaviour
     {
         private IScenarioService _service;
+        private SQLite.SQLiteConnection _db;
 
         public IScenarioService Service => _service;
 
@@ -20,12 +21,12 @@ namespace CounterDrone.Unity
             {
                 var paths = new UnityPathProvider();
                 Debug.Log($"ScenarioManager.Awake: dbPath={paths.GetMainDbPath()}");
-                var db = new DatabaseManager(paths).OpenMainDb();
+                _db = new DatabaseManager(paths).OpenMainDb();
                 _service = new ScenarioService(
-                    new SimTaskRepository(db), new CombatSceneRepository(db),
-                    new ControlZoneRepository(db), new TargetConfigRepository(db),
-                    new EquipmentDeploymentRepository(db), new CloudDispersalRepository(db),
-                    new RoutePlanRepository(db), new WaypointRepository(db));
+                    new SimTaskRepository(_db), new CombatSceneRepository(_db),
+                    new ControlZoneRepository(_db), new TargetConfigRepository(_db),
+                    new EquipmentDeploymentRepository(_db), new CloudDispersalRepository(_db),
+                    new RoutePlanRepository(_db), new WaypointRepository(_db));
                 Debug.Log("ScenarioManager.Awake: OK");
             }
             catch (System.Exception ex)
@@ -34,6 +35,8 @@ namespace CounterDrone.Unity
             }
         }
 
+        void OnDestroy() => _db?.Close();
+
         public SimTask CreateTask(string name, string number) => _service.CreateTask(name, number);
         public void DeleteTask(string id) => _service.DeleteTask(id);
         public TaskFullConfig GetDetail(string id) => _service.GetTaskDetail(id);

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

@@ -26,6 +26,7 @@ namespace CounterDrone.Unity
         private IScenarioService _scenario;
         private IPathProvider _paths;
         private string _taskId;
+        private SQLite.SQLiteConnection _db;
 
         private readonly Dictionary<string, GameObject> _entityVisuals = new();
         private readonly Dictionary<string, GameObject> _clouds = new();
@@ -37,13 +38,13 @@ namespace CounterDrone.Unity
         public void Awake()
         {
             _paths = new UnityPathProvider();
-            var db = new DatabaseManager(_paths).OpenMainDb();
+            _db = new DatabaseManager(_paths).OpenMainDb();
 
             _scenario = new ScenarioService(
-                new SimTaskRepository(db), new CombatSceneRepository(db),
-                new ControlZoneRepository(db), new TargetConfigRepository(db),
-                new EquipmentDeploymentRepository(db), new CloudDispersalRepository(db),
-                new RoutePlanRepository(db), new WaypointRepository(db));
+                new SimTaskRepository(_db), new CombatSceneRepository(_db),
+                new ControlZoneRepository(_db), new TargetConfigRepository(_db),
+                new EquipmentDeploymentRepository(_db), new CloudDispersalRepository(_db),
+                new RoutePlanRepository(_db), new WaypointRepository(_db));
 
             _frameStore = new FrameDataStore(_paths);
             _engine = new SimulationEngine(_scenario, _frameStore, new DamageModelRouter(), _paths);
@@ -148,7 +149,7 @@ namespace CounterDrone.Unity
         }
 
         public void Stop() => _engine?.Stop();
-        void OnDestroy() => Stop();
+        void OnDestroy() { Stop(); _db?.Close(); }
 
         private void SpawnDroneVisual(DroneEntity drone)
         {