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/string/reverseString.d.ts

@@ -0,0 +1,17 @@
+//#region src/string/reverseString.d.ts
+/**
+ * Reverses a given string.
+ *
+ * This function takes a string as input and returns a new string that is the reverse of the input.
+ *
+ * @param value - The string that is to be reversed.
+ * @returns The reversed string.
+ *
+ * @example
+ * const reversedStr1 = reverseString('hello') // returns 'olleh'
+ * const reversedStr2 = reverseString('PascalCase') // returns 'esaClacsaP'
+ * const reversedStr3 = reverseString('foo 😄 bar') // returns 'rab 😄 oof'
+ */
+declare function reverseString(value: string): string;
+//#endregion
+export { reverseString };