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/@vue/devtools-api/lib/cjs/time.js

@@ -0,0 +1,28 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.now = exports.isPerformanceSupported = void 0;
+let supported;
+let perf;
+function isPerformanceSupported() {
+    var _a;
+    if (supported !== undefined) {
+        return supported;
+    }
+    if (typeof window !== 'undefined' && window.performance) {
+        supported = true;
+        perf = window.performance;
+    }
+    else if (typeof globalThis !== 'undefined' && ((_a = globalThis.perf_hooks) === null || _a === void 0 ? void 0 : _a.performance)) {
+        supported = true;
+        perf = globalThis.perf_hooks.performance;
+    }
+    else {
+        supported = false;
+    }
+    return supported;
+}
+exports.isPerformanceSupported = isPerformanceSupported;
+function now() {
+    return isPerformanceSupported() ? perf.now() : Date.now();
+}
+exports.now = now;