fix: SqliteConnectionTracker — AssemblyReloadEvents.beforeAssemblyReload 安全关闭

- 静态追踪所有 SQLiteConnection，domain reload 前 Dispose 全部
- 替换所有 GC.Collect+WaitForPendingFinalizers 为 Tracker 模式
- DatabaseManager、ScenarioManager、中、SimulationRunner 等全部 Track/Untrack

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

@@ -19,10 +19,11 @@ namespace CounterDrone.Unity
         {
             var paths = new UnityPathProvider();
             _db = new DatabaseManager(paths).OpenMainDb();
+            SqliteConnectionTracker.Track(_db);
             _service = new GroupService(new GroupRepository(_db));
         }
 
-        void OnDisable() { _db?.Dispose(); _db = null; GC.Collect(); GC.WaitForPendingFinalizers(); }
+        void OnDisable() { SqliteConnectionTracker.Untrack(_db); _db?.Dispose(); _db = null; }
 
         public Group Create(string name, GroupType type, string desc = "")
             => _service.CreateGroup(name, type, desc);

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

@@ -49,6 +49,7 @@ namespace CounterDrone.Unity
             Debug.Log("3. Scenario configured");
 
             var db = new DatabaseManager(paths).OpenMainDb();
+            SqliteConnectionTracker.Track(db);
             foreach (var a in DefaultAmmunition.GetAll()) db.Insert(a);
             var ammoCatalog = db.Table<AmmunitionSpec>().ToList();
 
@@ -93,7 +94,8 @@ namespace CounterDrone.Unity
                     ReleaseAltitude = u.ReleaseAltitude > 0 ? u.ReleaseAltitude : null,
                 });
             scenarioMgr.SaveDeployment(taskId, equips);
-            db.Close();
+            SqliteConnectionTracker.Untrack(db);
+            db.Dispose();
             var plan = result.Best;
             Debug.Log($"4. Plan: {plan.ThreatsEngaged} threats engaged, {plan.MergedSchedule.Count} rounds, prob={plan.OverallProbability:P0}");
 

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

@@ -21,10 +21,11 @@ namespace CounterDrone.Unity
         {
             _paths = new UnityPathProvider();
             _db = new DatabaseManager(_paths).OpenMainDb();
+            SqliteConnectionTracker.Track(_db);
             _service = new ModelService(new ModelRepository(_db), _paths);
         }
 
-        void OnDisable() { _db?.Dispose(); _db = null; GC.Collect(); GC.WaitForPendingFinalizers(); }
+        void OnDisable() { SqliteConnectionTracker.Untrack(_db); _db?.Dispose(); _db = null; }
 
         public ModelInfo Import(string filePath, string name) => _service.ImportModel(filePath, name);
         public void Delete(string id) => _service.DeleteModel(id);

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

@@ -19,10 +19,11 @@ namespace CounterDrone.Unity
         {
             _paths = new UnityPathProvider();
             _db = new DatabaseManager(_paths).OpenMainDb();
+            SqliteConnectionTracker.Track(_db);
             _service = new ReportService(_db, _paths);
         }
 
-        void OnDisable() { _db?.Dispose(); _db = null; GC.Collect(); GC.WaitForPendingFinalizers(); }
+        void OnDisable() { SqliteConnectionTracker.Untrack(_db); _db?.Dispose(); _db = null; }
 
         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

@@ -22,6 +22,7 @@ namespace CounterDrone.Unity
                 var paths = new UnityPathProvider();
                 Debug.Log($"ScenarioManager.Awake: dbPath={paths.GetMainDbPath()}");
                 _db = new DatabaseManager(paths).OpenMainDb();
+                SqliteConnectionTracker.Track(_db);
                 _service = new ScenarioService(
                     new SimTaskRepository(_db), new CombatSceneRepository(_db),
                     new ControlZoneRepository(_db), new TargetConfigRepository(_db),
@@ -35,7 +36,7 @@ namespace CounterDrone.Unity
             }
         }
 
-        void OnDisable() { _db?.Dispose(); _db = null; GC.Collect(); GC.WaitForPendingFinalizers(); }
+        void OnDisable() { SqliteConnectionTracker.Untrack(_db); _db?.Dispose(); _db = null; }
 
         public SimTask CreateTask(string name, string number) => _service.CreateTask(name, number);
         public void DeleteTask(string id) => _service.DeleteTask(id);

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

@@ -33,6 +33,7 @@ namespace CounterDrone.Unity
 
             var dbm = new DatabaseManager(paths);
             var db = dbm.OpenMainDb();
+            SqliteConnectionTracker.Track(db);
             foreach (var a in DefaultAmmunition.GetAll()) db.Insert(a);
 
             // 创建想定
@@ -109,7 +110,8 @@ namespace CounterDrone.Unity
                 });
             scenario.SaveDeployment(taskId, equips);
 
-            db.Close();
+            SqliteConnectionTracker.Untrack(db);
+            db.Dispose();
 
             var plan = result.Best;
             Debug.Log($"规划方案: {plan.ThreatsEngaged} 威胁被分配, {plan.MergedSchedule.Count} 发, 概率 {plan.OverallProbability:P0}");

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

@@ -39,6 +39,7 @@ namespace CounterDrone.Unity
         {
             _paths = new UnityPathProvider();
             _db = new DatabaseManager(_paths).OpenMainDb();
+            SqliteConnectionTracker.Track(_db);
 
             _scenario = new ScenarioService(
                 new SimTaskRepository(_db), new CombatSceneRepository(_db),
@@ -149,7 +150,7 @@ namespace CounterDrone.Unity
         }
 
         public void Stop() => _engine?.Stop();
-        void OnDisable() { _db?.Dispose(); _db = null; GC.Collect(); GC.WaitForPendingFinalizers(); }
+        void OnDisable() { SqliteConnectionTracker.Untrack(_db); _db?.Dispose(); _db = null; }
         void OnDestroy() => Stop();
 
         private void SpawnDroneVisual(DroneEntity drone)

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

@@ -0,0 +1,45 @@
+using System.Collections.Generic;
+using SQLite;
+using UnityEngine;
+#if UNITY_EDITOR
+using UnityEditor;
+#endif
+
+namespace CounterDrone.Unity
+{
+    /// <summary>追踪所有打开的 SQLite 连接，在 domain reload 前安全关闭</summary>
+    public static class SqliteConnectionTracker
+    {
+        private static readonly List<SQLiteConnection> _connections = new();
+
+        static SqliteConnectionTracker()
+        {
+#if UNITY_EDITOR
+            AssemblyReloadEvents.beforeAssemblyReload += DisposeAll;
+#endif
+        }
+
+        public static void Track(SQLiteConnection db)
+        {
+            lock (_connections) { _connections.Add(db); }
+        }
+
+        public static void Untrack(SQLiteConnection db)
+        {
+            lock (_connections) { _connections.Remove(db); }
+        }
+
+        private static void DisposeAll()
+        {
+            lock (_connections)
+            {
+                foreach (var db in _connections)
+                {
+                    try { db.Dispose(); }
+                    catch { /* absorb */ }
+                }
+                _connections.Clear();
+            }
+        }
+    }
+}