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/predicate/isPrimitive.mjs

@@ -0,0 +1,27 @@
+//#region src/predicate/isPrimitive.ts
+/**
+* Checks whether a value is a JavaScript primitive.
+* JavaScript primitives include null, undefined, strings, numbers, booleans, symbols, and bigints.
+*
+* @param value The value to check.
+* @returns Returns true if `value` is a primitive, false otherwise.
+*
+* @example
+* isPrimitive(null); // true
+* isPrimitive(undefined); // true
+* isPrimitive('123'); // true
+* isPrimitive(false); // true
+* isPrimitive(true); // true
+* isPrimitive(Symbol('a')); // true
+* isPrimitive(123n); // true
+* isPrimitive({}); // false
+* isPrimitive(new Date()); // false
+* isPrimitive(new Map()); // false
+* isPrimitive(new Set()); // false
+* isPrimitive([1, 2, 3]); // false
+*/
+function isPrimitive(value) {
+	return value == null || typeof value !== "object" && typeof value !== "function";
+}
+//#endregion
+export { isPrimitive };