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/throttle.d.ts

@@ -0,0 +1,52 @@
+//#region src/function/throttle.d.ts
+interface ThrottleOptions {
+  /**
+   * An optional AbortSignal to cancel the throttled function.
+   */
+  signal?: AbortSignal;
+  /**
+   * An optional array specifying whether the function should be invoked on the leading edge, trailing edge, or both.
+   * If `edges` includes "leading", the function will be invoked at the start of the delay period.
+   * If `edges` includes "trailing", the function will be invoked at the end of the delay period.
+   * If both "leading" and "trailing" are included, the function will be invoked at both the start and end of the delay period.
+   * @default ["leading", "trailing"]
+   */
+  edges?: Array<'leading' | 'trailing'>;
+}
+interface ThrottledFunction<F extends (...args: any[]) => void> {
+  (...args: Parameters<F>): void;
+  cancel: () => void;
+  flush: () => void;
+}
+/**
+ * Creates a throttled function that only invokes the provided function at most once
+ * per every `throttleMs` milliseconds. Subsequent calls to the throttled function
+ * within the wait time will not trigger the execution of the original function.
+ *
+ * @template F - The type of function.
+ * @param func - The function to throttle.
+ * @param throttleMs - The number of milliseconds to throttle executions to.
+ * @returns A new throttled function that accepts the same parameters as the original function.
+ *
+ * @example
+ * const throttledFunction = throttle(() => {
+ *   console.log('Function executed');
+ * }, 1000);
+ *
+ * // Will log 'Function executed' immediately
+ * throttledFunction();
+ *
+ * // Will not log anything as it is within the throttle time
+ * throttledFunction();
+ *
+ * // After 1 second
+ * setTimeout(() => {
+ *   throttledFunction(); // Will log 'Function executed'
+ * }, 1000);
+ */
+declare function throttle<F extends (...args: any[]) => void>(func: F, throttleMs: number, {
+  signal,
+  edges
+}?: ThrottleOptions): ThrottledFunction<F>;
+//#endregion
+export { ThrottleOptions, ThrottledFunction, throttle };