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/_internal/isEqualsSameValueZero.mjs

@@ -0,0 +1,19 @@
+//#region src/_internal/isEqualsSameValueZero.ts
+/**
+* Performs a `SameValueZero` comparison between two values to determine if they are equivalent.
+*
+* @param {any} value - The value to compare.
+* @param {any} other - The other value to compare.
+* @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+*
+* @example
+* eq(1, 1); // true
+* eq(0, -0); // true
+* eq(NaN, NaN); // true
+* eq('a', Object('a')); // false
+*/
+function isEqualsSameValueZero(value, other) {
+	return value === other || Number.isNaN(value) && Number.isNaN(other);
+}
+//#endregion
+export { isEqualsSameValueZero };