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/upperFirst.js

@@ -0,0 +1,19 @@
+const require_upperFirst = require("../../string/upperFirst.js");
+const require_toString = require("../util/toString.js");
+//#region src/compat/string/upperFirst.ts
+/**
+* Converts the first character of string to upper case.
+*
+* @param str - The string that is to be changed
+* @returns The converted string.
+*
+* @example
+* const convertedStr1 = upperFirst('fred') // returns 'Fred'
+* const convertedStr2 = upperFirst('Fred') // returns 'Fred'
+* const convertedStr3 = upperFirst('FRED') // returns 'FRED'
+*/
+function upperFirst(str) {
+	return require_upperFirst.upperFirst(require_toString.toString(str));
+}
+//#endregion
+exports.upperFirst = upperFirst;