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/unescape.mjs

@@ -0,0 +1,21 @@
+import { unescape as unescape$1 } from "../../string/unescape.mjs";
+import { toString } from "../util/toString.mjs";
+//#region src/compat/string/unescape.ts
+/**
+* Converts the HTML entities `&`, `<`, `>`, `"`, and `'` in `str` to their corresponding characters.
+* It is the inverse of `escape`.
+*
+* @param str The string to unescape.
+* @returns Returns the unescaped string.
+*
+* @example
+* unescape('This is a &lt;div&gt; element.'); // returns 'This is a <div> element.'
+* unescape('This is a &quot;quote&quot;'); // returns 'This is a "quote"'
+* unescape('This is a &#39;quote&#39;'); // returns 'This is a 'quote''
+* unescape('This is a &amp; symbol'); // returns 'This is a & symbol'
+*/
+function unescape(str) {
+	return unescape$1(toString(str));
+}
+//#endregion
+export { unescape };