refactor(ui): 调整任务卡组件节点结构与样式

移除未使用的图片资源并清理任务组件冗余节点引用，优化卡牌预制体的布局与字体显示

assets/resources/game/heros/cards.png.meta

@@ -1,42 +0,0 @@
-{
-  "ver": "1.0.27",
-  "importer": "image",
-  "imported": true,
-  "uuid": "0474d69a-4ed2-4470-a797-19d9f23c09b0",
-  "files": [
-    ".json",
-    ".png"
-  ],
-  "subMetas": {
-    "6c48a": {
-      "importer": "texture",
-      "uuid": "0474d69a-4ed2-4470-a797-19d9f23c09b0@6c48a",
-      "displayName": "cards",
-      "id": "6c48a",
-      "name": "texture",
-      "userData": {
-        "wrapModeS": "repeat",
-        "wrapModeT": "repeat",
-        "minfilter": "linear",
-        "magfilter": "linear",
-        "mipfilter": "none",
-        "anisotropy": 0,
-        "isUuid": true,
-        "imageUuidOrDatabaseUri": "0474d69a-4ed2-4470-a797-19d9f23c09b0",
-        "visible": false
-      },
-      "ver": "1.0.22",
-      "imported": true,
-      "files": [
-        ".json"
-      ],
-      "subMetas": {}
-    }
-  },
-  "userData": {
-    "hasAlpha": true,
-    "type": "texture",
-    "fixAlphaTransparencyArtifacts": false,
-    "redirect": "0474d69a-4ed2-4470-a797-19d9f23c09b0@6c48a"
-  }
-}