feat: 实现供水运营专题大屏BI可视化

- 新增OperationDashboard.vue全屏大屏组件
- 添加6个核心KPI指标卡片: 进水总量/出水总量/产销差率/营收额/平均水质/报警次数
- 实现6个ECharts图表: 供水趋势/水质分布/报警统计/管网空间/设备状态/营收分析
- 创建静态HTML版本operation-dashboard.html，使用CDN加载Vue3/ECharts/Element Plus
- 更新路由配置，添加/operation路径支持
- 修复nextTick导入问题，优化build脚本

🚧 开发者: bot_dev1
📝 任务: #38 [BI] 运营仪表盘 + 供水专题大屏

frontend/node_modules/lodash-es/_baseUnset.js

@@ -0,0 +1,52 @@
+import castPath from './_castPath.js';
+import last from './last.js';
+import parent from './_parent.js';
+import toKey from './_toKey.js';
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * The base implementation of `_.unset`.
+ *
+ * @private
+ * @param {Object} object The object to modify.
+ * @param {Array|string} path The property path to unset.
+ * @returns {boolean} Returns `true` if the property is deleted, else `false`.
+ */
+function baseUnset(object, path) {
+  path = castPath(path, object);
+
+  // Prevent prototype pollution:
+  // https://github.com/lodash/lodash/security/advisories/GHSA-xxjr-mmjv-4gpg
+  // https://github.com/lodash/lodash/security/advisories/GHSA-f23m-r3pf-42rh
+  var index = -1,
+      length = path.length;
+
+  if (!length) {
+    return true;
+  }
+
+  while (++index < length) {
+    var key = toKey(path[index]);
+
+    // Always block "__proto__" anywhere in the path if it's not expected
+    if (key === '__proto__' && !hasOwnProperty.call(object, '__proto__')) {
+      return false;
+    }
+
+    // Block constructor/prototype as non-terminal traversal keys to prevent
+    // escaping the object graph into built-in constructors and prototypes.
+    if ((key === 'constructor' || key === 'prototype') && index < length - 1) {
+      return false;
+    }
+  }
+
+  var obj = parent(object, path);
+  return obj == null || delete obj[toKey(last(path))];
+}
+
+export default baseUnset;