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/state/ReportEventSettings.js

@@ -0,0 +1,12 @@
+import { useEffect, memo } from 'react';
+import { useAppDispatch } from './hooks';
+import { setEventSettings } from './eventSettingsSlice';
+import { propsAreEqual } from '../util/propsAreEqual';
+var ReportEventSettingsImpl = props => {
+  var dispatch = useAppDispatch();
+  useEffect(() => {
+    dispatch(setEventSettings(props));
+  }, [dispatch, props]);
+  return null;
+};
+export var ReportEventSettings = /*#__PURE__*/memo(ReportEventSettingsImpl, propsAreEqual);