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/zrender/lib/mixin/Draggable.d.ts

@@ -0,0 +1,13 @@
+import Handler from '../Handler';
+import Element, { ElementEvent } from '../Element';
+export default class Draggable {
+    handler: Handler;
+    _draggingTarget: Element;
+    _dropTarget: Element;
+    _x: number;
+    _y: number;
+    constructor(handler: Handler);
+    _dragStart(e: ElementEvent): void;
+    _drag(e: ElementEvent): void;
+    _dragEnd(e: ElementEvent): void;
+}

frontend/node_modules/zrender/lib/mixin/Draggable.js

@@ -0,0 +1,66 @@
+var Param = (function () {
+    function Param(target, e) {
+        this.target = target;
+        this.topTarget = e && e.topTarget;
+    }
+    return Param;
+}());
+var Draggable = (function () {
+    function Draggable(handler) {
+        this.handler = handler;
+        handler.on('mousedown', this._dragStart, this);
+        handler.on('mousemove', this._drag, this);
+        handler.on('mouseup', this._dragEnd, this);
+    }
+    Draggable.prototype._dragStart = function (e) {
+        var draggingTarget = e.target;
+        while (draggingTarget && !draggingTarget.draggable) {
+            draggingTarget = draggingTarget.parent || draggingTarget.__hostTarget;
+        }
+        if (draggingTarget) {
+            this._draggingTarget = draggingTarget;
+            draggingTarget.dragging = true;
+            this._x = e.offsetX;
+            this._y = e.offsetY;
+            this.handler.dispatchToElement(new Param(draggingTarget, e), 'dragstart', e.event);
+        }
+    };
+    Draggable.prototype._drag = function (e) {
+        var draggingTarget = this._draggingTarget;
+        if (draggingTarget) {
+            var x = e.offsetX;
+            var y = e.offsetY;
+            var dx = x - this._x;
+            var dy = y - this._y;
+            this._x = x;
+            this._y = y;
+            draggingTarget.drift(dx, dy, e);
+            this.handler.dispatchToElement(new Param(draggingTarget, e), 'drag', e.event);
+            var dropTarget = this.handler.findHover(x, y, draggingTarget).target;
+            var lastDropTarget = this._dropTarget;
+            this._dropTarget = dropTarget;
+            if (draggingTarget !== dropTarget) {
+                if (lastDropTarget && dropTarget !== lastDropTarget) {
+                    this.handler.dispatchToElement(new Param(lastDropTarget, e), 'dragleave', e.event);
+                }
+                if (dropTarget && dropTarget !== lastDropTarget) {
+                    this.handler.dispatchToElement(new Param(dropTarget, e), 'dragenter', e.event);
+                }
+            }
+        }
+    };
+    Draggable.prototype._dragEnd = function (e) {
+        var draggingTarget = this._draggingTarget;
+        if (draggingTarget) {
+            draggingTarget.dragging = false;
+        }
+        this.handler.dispatchToElement(new Param(draggingTarget, e), 'dragend', e.event);
+        if (this._dropTarget) {
+            this.handler.dispatchToElement(new Param(this._dropTarget, e), 'drop', e.event);
+        }
+        this._draggingTarget = null;
+        this._dropTarget = null;
+    };
+    return Draggable;
+}());
+export default Draggable;