fix: 修正技能类型并添加碰撞组件

- 将m_water_ball_1.prefab的_type从1改为0
- 在SACastSystem.ts中修复目标返回逻辑
- 为atk_s1.prefab添加RigidBody2D和BoxCollider2D组件

assets/resources/game/skill/atk/atk_s1.prefab

@@ -32,10 +32,16 @@
       },
       {
         "__id__": 16
+      },
+      {
+        "__id__": 18
+      },
+      {
+        "__id__": 20
       }
     ],
     "_prefab": {
-      "__id__": 18
+      "__id__": 22
     },
     "_lpos": {
       "__type__": "cc.Vec3",
@@ -356,6 +362,74 @@
     "__type__": "cc.CompPrefabInfo",
     "fileId": "35nW0iQNBH2bqkWAr3MVkQ"
   },
+  {
+    "__type__": "cc.RigidBody2D",
+    "_name": "",
+    "_objFlags": 0,
+    "__editorExtras__": {},
+    "node": {
+      "__id__": 1
+    },
+    "_enabled": true,
+    "__prefab": {
+      "__id__": 19
+    },
+    "enabledContactListener": true,
+    "bullet": false,
+    "awakeOnLoad": true,
+    "_group": 1,
+    "_type": 0,
+    "_allowSleep": false,
+    "_gravityScale": 1,
+    "_linearDamping": 0,
+    "_angularDamping": 0,
+    "_linearVelocity": {
+      "__type__": "cc.Vec2",
+      "x": 0,
+      "y": 0
+    },
+    "_angularVelocity": 0,
+    "_fixedRotation": false,
+    "_id": ""
+  },
+  {
+    "__type__": "cc.CompPrefabInfo",
+    "fileId": "57cr7S0YpK4oEZCavwXtIX"
+  },
+  {
+    "__type__": "cc.BoxCollider2D",
+    "_name": "",
+    "_objFlags": 0,
+    "__editorExtras__": {},
+    "node": {
+      "__id__": 1
+    },
+    "_enabled": false,
+    "__prefab": {
+      "__id__": 21
+    },
+    "tag": 0,
+    "_group": 1,
+    "_density": 1,
+    "_sensor": true,
+    "_friction": 0.2,
+    "_restitution": 0,
+    "_offset": {
+      "__type__": "cc.Vec2",
+      "x": 0,
+      "y": 0
+    },
+    "_size": {
+      "__type__": "cc.Size",
+      "width": 50,
+      "height": 50
+    },
+    "_id": ""
+  },
+  {
+    "__type__": "cc.CompPrefabInfo",
+    "fileId": "ebw5mObxNGGKxnJXDgX5gl"
+  },
   {
     "__type__": "cc.PrefabInfo",
     "root": {

assets/resources/game/skill/atk/m_water_ball_1.prefab

@@ -304,7 +304,7 @@
     "bullet": false,
     "awakeOnLoad": true,
     "_group": 1,
-    "_type": 1,
+    "_type": 0,
     "_allowSleep": false,
     "_gravityScale": 1,
     "_linearDamping": 0,