Add settings page for managing forecasting API key and URL via UI

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/node_modules/recharts/es6/context/ErrorBarContext.js

@@ -0,0 +1,64 @@
+var _excluded = ["children"];
+function _objectWithoutProperties(e, t) { if (null == e) return {}; var o, r, i = _objectWithoutPropertiesLoose(e, t); if (Object.getOwnPropertySymbols) { var n = Object.getOwnPropertySymbols(e); for (r = 0; r < n.length; r++) o = n[r], -1 === t.indexOf(o) && {}.propertyIsEnumerable.call(e, o) && (i[o] = e[o]); } return i; }
+function _objectWithoutPropertiesLoose(r, e) { if (null == r) return {}; var t = {}; for (var n in r) if ({}.hasOwnProperty.call(r, n)) { if (-1 !== e.indexOf(n)) continue; t[n] = r[n]; } return t; }
+import * as React from 'react';
+import { createContext, useContext, useEffect, useRef } from 'react';
+import { addErrorBar, removeErrorBar, replaceErrorBar } from '../state/errorBarSlice';
+import { useAppDispatch } from '../state/hooks';
+import { useGraphicalItemId } from './RegisterGraphicalItemId';
+var initialContextState = {
+  data: [],
+  xAxisId: 'xAxis-0',
+  yAxisId: 'yAxis-0',
+  dataPointFormatter: () => ({
+    x: 0,
+    y: 0,
+    value: 0
+  }),
+  errorBarOffset: 0
+};
+var ErrorBarContext = /*#__PURE__*/createContext(initialContextState);
+export function SetErrorBarContext(props) {
+  var children = props.children,
+    rest = _objectWithoutProperties(props, _excluded);
+  return /*#__PURE__*/React.createElement(ErrorBarContext.Provider, {
+    value: rest
+  }, children);
+}
+export var useErrorBarContext = () => useContext(ErrorBarContext);
+export function ReportErrorBarSettings(props) {
+  var dispatch = useAppDispatch();
+  var graphicalItemId = useGraphicalItemId();
+  var prevPropsRef = useRef(null);
+  useEffect(() => {
+    if (graphicalItemId == null) {
+      // ErrorBar outside a graphical item context does not do anything.
+      return;
+    }
+    if (prevPropsRef.current === null) {
+      dispatch(addErrorBar({
+        itemId: graphicalItemId,
+        errorBar: props
+      }));
+    } else if (prevPropsRef.current !== props) {
+      dispatch(replaceErrorBar({
+        itemId: graphicalItemId,
+        prev: prevPropsRef.current,
+        next: props
+      }));
+    }
+    prevPropsRef.current = props;
+  }, [dispatch, graphicalItemId, props]);
+  useEffect(() => {
+    return () => {
+      if (prevPropsRef.current != null && graphicalItemId != null) {
+        dispatch(removeErrorBar({
+          itemId: graphicalItemId,
+          errorBar: prevPropsRef.current
+        }));
+        prevPropsRef.current = null;
+      }
+    };
+  }, [dispatch, graphicalItemId]);
+  return null;
+}