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/merge.mjs

@@ -0,0 +1,45 @@
+import { noop } from "../../function/noop.mjs";
+import { mergeWith } from "./mergeWith.mjs";
+//#region src/compat/object/merge.ts
+/**
+* Merges the properties of one or more source objects into the target object.
+*
+* This function performs a deep merge, recursively merging nested objects and arrays.
+* If a property in the source object is an array or object and the corresponding property in the target object is also an array or object, they will be merged.
+* If a property in the source object is `undefined`, it will not overwrite a defined property in the target object.
+*
+* The function can handle multiple source objects and will merge them all into the target object.
+*
+* @param object - The target object into which the source object properties will be merged. This object is modified in place.
+* @param sources - The source objects whose properties will be merged into the target object.
+* @returns The updated target object with properties from the source object(s) merged in.
+*
+* @example
+* const target = { a: 1, b: { x: 1, y: 2 } };
+* const source = { b: { y: 3, z: 4 }, c: 5 };
+*
+* const result = merge(target, source);
+* console.log(result);
+* // Output: { a: 1, b: { x: 1, y: 3, z: 4 }, c: 5 }
+*
+* @example
+* const target = { a: [1, 2], b: { x: 1 } };
+* const source = { a: [3], b: { y: 2 } };
+*
+* const result = merge(target, source);
+* console.log(result);
+* // Output: { a: [3], b: { x: 1, y: 2 } }
+*
+* @example
+* const target = { a: null };
+* const source = { a: [1, 2, 3] };
+*
+* const result = merge(target, source);
+* console.log(result);
+* // Output: { a: [1, 2, 3] }
+*/
+function merge(object, ...sources) {
+	return mergeWith(object, ...sources, noop);
+}
+//#endregion
+export { merge };