Docs + simulations refresh; align spill-flow keys with new position

- wiki/functional-description.md: rename Overfill Protection → High-volume
  Safety; tighten basin-ordering chain; relocate level-based mode
  diagrams under wiki/diagrams/modes/level-based/; document the new
  flow.predicted.overflow.default position (replaces the previous
  child='overflow' under position 'out'); add underflowVolume +
  predictedUnderflowVolume entries.
- wiki/modes/{levelbased,powerbased}.md: paragraph cleanups.
- wiki/diagrams: move level-linear basin diagram under modes/level-based/
  alongside a new level-log variant.
- simulations/run.js: add max_demand_gt expectation.
- simulations/scenarios/*: minor fixture updates.
- test/basic/nodeClass-config.test.js: new config-shape coverage.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

test/basic/nodeClass-config.test.js

@@ -0,0 +1,74 @@
+const test = require('node:test');
+const assert = require('node:assert/strict');
+
+const NodeClass = require('../../src/nodeClass');
+
+function loadConfig(uiConfig = {}) {
+  const ctx = { name: 'pumpingStation' };
+  NodeClass.prototype._loadConfig.call(ctx, {
+    name: 'PS Config Test',
+    basinVolume: 80,
+    basinHeight: 8,
+    inflowLevel: 3.2,
+    outflowLevel: 0.4,
+    overflowLevel: 7.4,
+    inletPipeDiameter: 0.5,
+    outletPipeDiameter: 0.35,
+    refHeight: 'NAP',
+    minHeightBasedOn: 'outlet',
+    basinBottomRef: -1.2,
+    maxInflowRate: 300,
+    staticHead: 11,
+    maxDischargeHead: 22,
+    pipelineLength: 120,
+    defaultFluid: 'wastewater',
+    temperatureReferenceDegC: 16,
+    controlMode: 'levelbased',
+    minLevel: 0.8,
+    startLevel: 2,
+    maxLevel: 6.5,
+    levelCurveType: 'log',
+    logCurveFactor: 7,
+    enableDryRunProtection: true,
+    dryRunThresholdPercent: 3,
+    enableHighVolumeSafety: true,
+    highVolumeSafetyThresholdPercent: 96,
+    timeleftToFullOrEmptyThresholdSeconds: 60,
+    processOutputFormat: 'process',
+    dbaseOutputFormat: 'influxdb',
+    ...uiConfig,
+  }, { id: 'node-1' });
+  return ctx.config;
+}
+
+test('nodeClass config mapping — basin, hydraulics, mode and safety fields', () => {
+  const cfg = loadConfig();
+
+  assert.equal(cfg.basin.inletPipeDiameter, 0.5);
+  assert.equal(cfg.basin.outletPipeDiameter, 0.35);
+  assert.equal(cfg.hydraulics.maxInflowRate, 300);
+  assert.equal(cfg.hydraulics.staticHead, 11);
+  assert.equal(cfg.hydraulics.maxDischargeHead, 22);
+  assert.equal(cfg.hydraulics.pipelineLength, 120);
+  assert.equal(cfg.hydraulics.defaultFluid, 'wastewater');
+  assert.equal(cfg.hydraulics.temperatureReferenceDegC, 16);
+  assert.equal(cfg.control.mode, 'levelbased');
+  assert.equal(cfg.control.levelbased.curveType, 'log');
+  assert.equal(cfg.control.levelbased.logCurveFactor, 7);
+  assert.equal(cfg.safety.enableHighVolumeSafety, true);
+  assert.equal(cfg.safety.highVolumeSafetyThresholdPercent, 96);
+  assert.equal(cfg.output.process, 'process');
+  assert.equal(cfg.output.dbase, 'influxdb');
+});
+
+test('nodeClass config mapping — accepts deprecated overfill UI fields', () => {
+  const cfg = loadConfig({
+    enableHighVolumeSafety: undefined,
+    highVolumeSafetyThresholdPercent: undefined,
+    enableOverfillProtection: false,
+    overfillThresholdPercent: 91,
+  });
+
+  assert.equal(cfg.safety.enableHighVolumeSafety, false);
+  assert.equal(cfg.safety.highVolumeSafetyThresholdPercent, 91);
+});