feat(依赖): 添加Excel文件处理功能支持

新增xlsx和xlsx-style依赖库，用于支持Excel文件的导入导出功能，提升数据处理的灵活性。

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

package.json

@@ -40,7 +40,9 @@
     "vue-router": "^3.0.1",
     "vue-text-format": "^1.2.6",
     "vuedraggable": "^2.24.3",
-    "vuex": "^3.1.1"
+    "vuex": "^3.1.1",
+    "xlsx": "^0.18.5",
+    "xlsx-style": "^0.8.13"
   },
   "devDependencies": {
     "@babel/plugin-proposal-nullish-coalescing-operator": "^7.18.6",