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/es-toolkit/dist/object/findKey.js

@@ -0,0 +1,24 @@
+//#region src/object/findKey.ts
+/**
+* Finds the key of the first element in the object that satisfies the provided testing function.
+*
+* @param obj - The object to search.
+* @param predicate - The function to execute on each value in the object. It takes three arguments:
+*   - value: The current value being processed in the object.
+*   - key: The key of the current value being processed in the object.
+*   - obj: The object that findKey was called upon.
+* @returns The key of the first element in the object that passes the test, or undefined if no element passes.
+*
+* @example
+* const users = {
+*   'barney':  { 'age': 36, 'active': true },
+*   'fred':    { 'age': 40, 'active': false },
+*   'pebbles': { 'age': 1,  'active': true }
+* };
+* findKey(users, function(o) { return o.age < 40; }); => 'barney'
+*/
+function findKey(obj, predicate) {
+	return Object.keys(obj).find((key) => predicate(obj[key], key, obj));
+}
+//#endregion
+exports.findKey = findKey;