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/isObject.d.mts

@@ -0,0 +1,27 @@
+//#region src/compat/predicate/isObject.d.ts
+/**
+ * Checks if the given value is an object. An object is a value that is
+ * not a primitive type (string, number, boolean, symbol, null, or undefined).
+ *
+ * This function tests whether the provided value is an object or not.
+ * It returns `true` if the value is an object, and `false` otherwise.
+ *
+ * This function can also serve as a type predicate in TypeScript, narrowing the type of the argument to an object value.
+ *
+ * @param value - The value to check if it is an object.
+ * @returns `true` if the value is an object, `false` otherwise.
+ *
+ * @example
+ * const value1 = {};
+ * const value2 = [1, 2, 3];
+ * const value3 = () => {};
+ * const value4 = null;
+ *
+ * console.log(isObject(value1)); // true
+ * console.log(isObject(value2)); // true
+ * console.log(isObject(value3)); // true
+ * console.log(isObject(value4)); // false
+ */
+declare function isObject(value?: any): value is object;
+//#endregion
+export { isObject };