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/redux/src/compose.ts

@@ -0,0 +1,61 @@
+type Func<T extends any[], R> = (...a: T) => R
+
+/**
+ * Composes single-argument functions from right to left. The rightmost
+ * function can take multiple arguments as it provides the signature for the
+ * resulting composite function.
+ *
+ * @param funcs The functions to compose.
+ * @returns A function obtained by composing the argument functions from right
+ *   to left. For example, `compose(f, g, h)` is identical to doing
+ *   `(...args) => f(g(h(...args)))`.
+ */
+export default function compose(): <R>(a: R) => R
+
+export default function compose<F extends Function>(f: F): F
+
+/* two functions */
+export default function compose<A, T extends any[], R>(
+  f1: (a: A) => R,
+  f2: Func<T, A>
+): Func<T, R>
+
+/* three functions */
+export default function compose<A, B, T extends any[], R>(
+  f1: (b: B) => R,
+  f2: (a: A) => B,
+  f3: Func<T, A>
+): Func<T, R>
+
+/* four functions */
+export default function compose<A, B, C, T extends any[], R>(
+  f1: (c: C) => R,
+  f2: (b: B) => C,
+  f3: (a: A) => B,
+  f4: Func<T, A>
+): Func<T, R>
+
+/* rest */
+export default function compose<R>(
+  f1: (a: any) => R,
+  ...funcs: Function[]
+): (...args: any[]) => R
+
+export default function compose<R>(...funcs: Function[]): (...args: any[]) => R
+
+export default function compose(...funcs: Function[]) {
+  if (funcs.length === 0) {
+    // infer the argument type so it is usable in inference down the line
+    return <T>(arg: T) => arg
+  }
+
+  if (funcs.length === 1) {
+    return funcs[0]
+  }
+
+  return funcs.reduce(
+    (a, b) =>
+      (...args: any) =>
+        a(b(...args))
+  )
+}