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/camelCase.d.ts

@@ -0,0 +1,19 @@
+//#region src/compat/string/camelCase.d.ts
+/**
+ * Converts a string to camel case.
+ *
+ * Camel case is the naming convention in which the first word is written in lowercase and
+ * each subsequent word begins with a capital letter, concatenated without any separator characters.
+ *
+ * @param str - The string that is to be changed to camel case.
+ * @returns The converted string to camel case.
+ *
+ * @example
+ * const convertedStr1 = camelCase('camelCase') // returns 'camelCase'
+ * const convertedStr2 = camelCase('some whitespace') // returns 'someWhitespace'
+ * const convertedStr3 = camelCase('hyphen-text') // returns 'hyphenText'
+ * const convertedStr4 = camelCase('HTTPRequest') // returns 'httpRequest'
+ */
+declare function camelCase(str?: string): string;
+//#endregion
+export { camelCase };