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/compat/predicate/isArray.js

@@ -0,0 +1,26 @@
+//#region src/compat/predicate/isArray.ts
+/**
+* Checks if the given value is an array.
+*
+* This function tests whether the provided value is an array or not.
+* It returns `true` if the value is an array, and `false` otherwise.
+*
+* This function can also serve as a type predicate in TypeScript, narrowing the type of the argument to an array.
+*
+* @param value - The value to test if it is an array.
+* @returns `true` if the value is an array, `false` otherwise.
+*
+* @example
+* const value1 = [1, 2, 3];
+* const value2 = 'abc';
+* const value3 = () => {};
+*
+* console.log(isArray(value1)); // true
+* console.log(isArray(value2)); // false
+* console.log(isArray(value3)); // false
+*/
+function isArray(value) {
+	return Array.isArray(value);
+}
+//#endregion
+exports.isArray = isArray;