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/math/round.mjs

@@ -0,0 +1,19 @@
+import { decimalAdjust } from "../_internal/decimalAdjust.mjs";
+//#region src/compat/math/round.ts
+/**
+* Computes number rounded to precision.
+*
+* @param number  The number to round.
+* @param precision The precision to round to.
+* @returns Returns the rounded number.
+*
+* @example
+* round(4.006); // => 4
+* round(4.006, 2); // => 4.01
+* round(4060, -2); // => 4100
+*/
+function round(number, precision = 0) {
+	return decimalAdjust("round", number, precision);
+}
+//#endregion
+export { round };