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/object/defaultsDeep.mjs

@@ -0,0 +1,70 @@
+import { isPlainObject } from "../predicate/isPlainObject.mjs";
+//#region src/compat/object/defaultsDeep.ts
+/**
+* Recursively assigns default values to an `object`, ensuring that certain properties do not remain `undefined`.
+* It sets default values for properties that are either `undefined` or inherited from `Object.prototype`.
+*
+* Similar to `defaults` but recursively applies default values to nested objects.
+* Source objects are applied in order from left to right, and once a property has been assigned a value,
+* any subsequent values for that property will be ignored.
+*
+* Note: This function modifies the first argument, `object`.
+*
+* @template T - The type of the object being processed.
+* @param target - The target object that will receive default values.
+* @param sources - One or more source objects that specify default values to apply.
+* @returns The `object` that has been updated with default values from all sources, recursively merging nested objects.
+*
+* @example
+* defaultsDeep({ a: { b: 2 } }, { a: { b: 3, c: 3 }, d: 4 }); // { a: { b: 2, c: 3 }, d: 4 }
+* defaultsDeep({ a: { b: undefined } }, { a: { b: 1 } }); // { a: { b: 1 } }
+* defaultsDeep({ a: null }, { a: { b: 1 } }); // { a: null }
+*/
+function defaultsDeep(target, ...sources) {
+	target = Object(target);
+	for (let i = 0; i < sources.length; i++) {
+		const source = sources[i];
+		if (source != null) defaultsDeepRecursive(target, source, /* @__PURE__ */ new WeakMap());
+	}
+	return target;
+}
+function defaultsDeepRecursive(target, source, stack) {
+	for (const key in source) {
+		const sourceValue = source[key];
+		const targetValue = target[key];
+		if (targetValue === void 0 || !Object.hasOwn(target, key)) {
+			target[key] = handleMissingProperty(sourceValue, stack);
+			continue;
+		}
+		if (stack.get(sourceValue) === targetValue) continue;
+		handleExistingProperty(targetValue, sourceValue, stack);
+	}
+}
+function handleMissingProperty(sourceValue, stack) {
+	if (stack.has(sourceValue)) return stack.get(sourceValue);
+	if (isPlainObject(sourceValue)) {
+		const newObj = {};
+		stack.set(sourceValue, newObj);
+		defaultsDeepRecursive(newObj, sourceValue, stack);
+		return newObj;
+	}
+	return sourceValue;
+}
+function handleExistingProperty(targetValue, sourceValue, stack) {
+	if (isPlainObject(targetValue) && isPlainObject(sourceValue)) {
+		stack.set(sourceValue, targetValue);
+		defaultsDeepRecursive(targetValue, sourceValue, stack);
+		return;
+	}
+	if (Array.isArray(targetValue) && Array.isArray(sourceValue)) {
+		stack.set(sourceValue, targetValue);
+		mergeArrays(targetValue, sourceValue, stack);
+	}
+}
+function mergeArrays(targetArray, sourceArray, stack) {
+	const minLength = Math.min(sourceArray.length, targetArray.length);
+	for (let i = 0; i < minLength; i++) if (isPlainObject(targetArray[i]) && isPlainObject(sourceArray[i])) defaultsDeepRecursive(targetArray[i], sourceArray[i], stack);
+	for (let i = minLength; i < sourceArray.length; i++) targetArray.push(sourceArray[i]);
+}
+//#endregion
+export { defaultsDeep };