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/function/debounce.js

@@ -0,0 +1,91 @@
+//#region src/function/debounce.ts
+/**
+* Creates a debounced function that delays invoking the provided function until after `debounceMs` milliseconds
+* have elapsed since the last time the debounced function was invoked. The debounced function also has a `cancel`
+* method to cancel any pending execution.
+*
+* @template F - The type of function.
+* @param func - The function to debounce.
+* @param debounceMs - The number of milliseconds to delay.
+* @param options - The options object
+* @param options.signal - An optional AbortSignal to cancel the debounced function.
+* @param options.edges - An optional array specifying whether the function should be invoked on the leading edge, trailing edge, or both.
+* @returns A new debounced function with a `cancel` method.
+*
+* @example
+* const debouncedFunction = debounce(() => {
+*   console.log('Function executed');
+* }, 1000);
+*
+* // Will log 'Function executed' after 1 second if not called again in that time
+* debouncedFunction();
+*
+* // Will not log anything as the previous call is canceled
+* debouncedFunction.cancel();
+*
+* // With AbortSignal
+* const controller = new AbortController();
+* const signal = controller.signal;
+* const debouncedWithSignal = debounce(() => {
+*  console.log('Function executed');
+* }, 1000, { signal });
+*
+* debouncedWithSignal();
+*
+* // Will cancel the debounced function call
+* controller.abort();
+*/
+function debounce(func, debounceMs, { signal, edges } = {}) {
+	let pendingThis = void 0;
+	let pendingArgs = null;
+	const leading = edges != null && edges.includes("leading");
+	const trailing = edges == null || edges.includes("trailing");
+	const invoke = () => {
+		if (pendingArgs !== null) {
+			func.apply(pendingThis, pendingArgs);
+			pendingThis = void 0;
+			pendingArgs = null;
+		}
+	};
+	const onTimerEnd = () => {
+		if (trailing) invoke();
+		cancel();
+	};
+	let timeoutId = null;
+	const schedule = () => {
+		if (timeoutId != null) clearTimeout(timeoutId);
+		timeoutId = setTimeout(() => {
+			timeoutId = null;
+			onTimerEnd();
+		}, debounceMs);
+	};
+	const cancelTimer = () => {
+		if (timeoutId !== null) {
+			clearTimeout(timeoutId);
+			timeoutId = null;
+		}
+	};
+	const cancel = () => {
+		cancelTimer();
+		pendingThis = void 0;
+		pendingArgs = null;
+	};
+	const flush = () => {
+		invoke();
+	};
+	const debounced = function(...args) {
+		if (signal?.aborted) return;
+		pendingThis = this;
+		pendingArgs = args;
+		const isFirstCall = timeoutId == null;
+		schedule();
+		if (leading && isFirstCall) invoke();
+	};
+	debounced.schedule = schedule;
+	debounced.cancel = cancel;
+	debounced.flush = flush;
+	signal?.addEventListener("abort", cancel, { once: true });
+	return debounced;
+}
+//#endregion
+exports.debounce = debounce;