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/dayjs/esm/locale/ro.js

@@ -0,0 +1,39 @@
+// Romanian [ro]
+import dayjs from '../index';
+var locale = {
+  name: 'ro',
+  weekdays: 'Duminică_Luni_Marți_Miercuri_Joi_Vineri_Sâmbătă'.split('_'),
+  weekdaysShort: 'Dum_Lun_Mar_Mie_Joi_Vin_Sâm'.split('_'),
+  weekdaysMin: 'Du_Lu_Ma_Mi_Jo_Vi_Sâ'.split('_'),
+  months: 'Ianuarie_Februarie_Martie_Aprilie_Mai_Iunie_Iulie_August_Septembrie_Octombrie_Noiembrie_Decembrie'.split('_'),
+  monthsShort: 'Ian._Febr._Mart._Apr._Mai_Iun._Iul._Aug._Sept._Oct._Nov._Dec.'.split('_'),
+  weekStart: 1,
+  formats: {
+    LT: 'H:mm',
+    LTS: 'H:mm:ss',
+    L: 'DD.MM.YYYY',
+    LL: 'D MMMM YYYY',
+    LLL: 'D MMMM YYYY H:mm',
+    LLLL: 'dddd, D MMMM YYYY H:mm'
+  },
+  relativeTime: {
+    future: 'peste %s',
+    past: 'acum %s',
+    s: 'câteva secunde',
+    m: 'un minut',
+    mm: '%d minute',
+    h: 'o oră',
+    hh: '%d ore',
+    d: 'o zi',
+    dd: '%d zile',
+    M: 'o lună',
+    MM: '%d luni',
+    y: 'un an',
+    yy: '%d ani'
+  },
+  ordinal: function ordinal(n) {
+    return n;
+  }
+};
+dayjs.locale(locale, null, true);
+export default locale;