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/protobufjs/google/protobuf/compiler/plugin.proto

@@ -0,0 +1,47 @@
+syntax = "proto2";
+
+package google.protobuf.compiler;
+option java_package = "com.google.protobuf.compiler";
+option java_outer_classname = "PluginProtos";
+
+import "google/protobuf/descriptor.proto";
+
+option csharp_namespace = "Google.Protobuf.Compiler";
+option go_package = "google.golang.org/protobuf/types/pluginpb";
+
+message Version {
+  optional int32 major = 1;
+  optional int32 minor = 2;
+  optional int32 patch = 3;
+  optional string suffix = 4;
+}
+
+message CodeGeneratorRequest {
+  repeated string file_to_generate = 1;
+  optional string parameter = 2;
+  repeated FileDescriptorProto proto_file = 15;
+  repeated FileDescriptorProto source_file_descriptors = 17;
+  optional Version compiler_version = 3;
+}
+
+message CodeGeneratorResponse {
+  optional string error = 1;
+  optional uint64 supported_features = 2;
+
+  enum Feature {
+    FEATURE_NONE = 0;
+    FEATURE_PROTO3_OPTIONAL = 1;
+    FEATURE_SUPPORTS_EDITIONS = 2;
+  }
+
+  optional int32 minimum_edition = 3;
+  optional int32 maximum_edition = 4;
+
+  message File {
+    optional string name = 1;
+    optional string insertion_point = 2;
+    optional string content = 15;
+    optional GeneratedCodeInfo generated_code_info = 16;
+  }
+  repeated File file = 15;
+}