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/string/padEnd.mjs

@@ -0,0 +1,24 @@
+import { toString } from "../util/toString.mjs";
+//#region src/compat/string/padEnd.ts
+/**
+* Pads the end of a string with a given character until it reaches the specified length.
+*
+* If the length is less than or equal to the original string's length, or if the padding character is an empty string,
+* the original string is returned unchanged.
+*
+* @param str - The string to pad.
+* @param [length] - The length of the resulting string once padded.
+* @param [chars] - The character(s) to use for padding.
+* @returns The padded string, or the original string if padding is not required.
+*
+* @example
+* const result1 = padEnd('abc', 6);          // result will be 'abc   '
+* const result2 = padEnd('abc', 6, '_-');    // result will be 'abc_-_'
+* const result3 = padEnd('abc', 3);          // result will be 'abc'
+* const result4 = padEnd('abc', 2);          // result will be 'abc'
+*/
+function padEnd(str, length = 0, chars = " ") {
+	return toString(str).padEnd(length, chars);
+}
+//#endregion
+export { padEnd };