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/nosleep.js/.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,16 @@
+<!--
+  👉🏽 Need support, advice, or help? Don't open an issue!
+  Head to StackOverflow https://stackoverflow.com.
+
+  Hey there!
+
+  You arrived at this template because you felt none of the other options
+  matched the kind of issue you'd like to report. Please use this opportunity to
+  tell us about your particular type of issue so we can try to accommodate
+  similar issues in the future.
+
+  PLEASE do note, if you're using this to report an issue already covered by the
+  existing template types, your issue may be closed as invalid. Our issue
+  templates contain fields that help us help you, and without that important
+  info, we might as well be ice-skating uphill, carrying a wooly mammoth.
+-->