feat: add node coverage and improve investigation presentation

app/mcp/catalog.py

@@ -6,7 +6,7 @@ from mcp import types
 from app.mcp import models as m
 from app.mcp import calculation_models as jobs
 from app.mcp import extended_models as e
-from app.mcp.analysis_models import BurstDetectionInput, BurstLocationInput, ValveIsolationInput, LeakageIdentificationInput
+from app.mcp.analysis_models import BurstDetectionInput, BurstLocationInput, ValveIsolationInput, LeakageIdentificationInput, NodeCoverageInput
 from app.mcp.analysis_models import ScenarioInput, ContaminantSimulationInput, ValveClosureInput, FlushingInput, PressureRegulationInput, SensorPlacementInput
 
 
@@ -61,6 +61,7 @@ _specs = [
     ("run_burst_detection", "爆管异常侦测：使用至少5个完整压力传感器此前15天数据；只提示压力异常，不定位、不证明爆管", BurstDetectionInput, "burst.run", "analysis", False, True),
     ("run_burst_location", "爆管候选定位：对比异常与正常压力，可辅助流量；burst_leakage必需，可使用有依据的估计或明确给定的情景假设，不要求现场确诊；本工具不反演总漏水量。压力节点可省略，自动读取项目SCADA压力测点；monitoring正常窗可成对省略，默认前一天同时间段，须说明该对照假设。simulation须有已有分析运行UUID并读取同窗模型基线，不是实测；定位内部会执行水力计算，不创建新的事件方案", BurstLocationInput, "burst.run", "analysis", False, True),
     ("analyze_valve_isolation", "按事故候选要素分析拓扑隔离边界、建议关闭阀门和受影响节点；候选分析无需等待现场确诊。输出不是污染扩散或水力影响范围；现场操作前须核实阀门映射及可用性，本工具不执行关阀", ValveIsolationInput, "simulation.run", "analysis", False, True),
+    ("generate_node_coverage", "为当前项目已核实的模型节点集合生成空间覆盖示意，适用于候选分布、监测覆盖比较、区域成员、隔离或模拟结果节点等，不限调查任务。支持最多8组、合计10000个不同节点，从真实GIS查询坐标；监测设备、投诉或地址须先关联模型节点。可按连接分组，记录凹包/缓冲参数、缺失节点和display_only；不计算故障、污染、实际停水或服务边界。返回result.map_payload及coverage，任务中用set_overlay引用本次evidence_id、省略data展示；生成不自动操作地图", NodeCoverageInput, "webgis.view", "analysis", False, True),
     (
         "get_element_properties",
         "读取当前项目的单个管网元素属性",