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/function/debounce.mjs

@@ -0,0 +1,38 @@
+import { debounce as debounce$1 } from "../../function/debounce.mjs";
+//#region src/compat/function/debounce.ts
+function debounce(func, debounceMs = 0, options = {}) {
+	if (typeof options !== "object") options = {};
+	const { leading = false, trailing = true, maxWait } = options;
+	const edges = Array(2);
+	if (leading) edges[0] = "leading";
+	if (trailing) edges[1] = "trailing";
+	let result = void 0;
+	let pendingAt = null;
+	const _debounced = debounce$1(function(...args) {
+		result = func.apply(this, args);
+		pendingAt = null;
+	}, debounceMs, { edges });
+	const debounced = function(...args) {
+		if (maxWait != null) {
+			if (pendingAt === null) pendingAt = Date.now();
+			if (Date.now() - pendingAt >= maxWait) {
+				result = func.apply(this, args);
+				pendingAt = Date.now();
+				_debounced.cancel();
+				_debounced.schedule();
+				return result;
+			}
+		}
+		_debounced.apply(this, args);
+		return result;
+	};
+	const flush = () => {
+		_debounced.flush();
+		return result;
+	};
+	debounced.cancel = _debounced.cancel;
+	debounced.flush = flush;
+	return debounced;
+}
+//#endregion
+export { debounce };