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/endsWith.d.mts

@@ -0,0 +1,21 @@
+//#region src/compat/string/endsWith.d.ts
+/**
+ * Checks if a string contains another string at the end of the string.
+ *
+ * Checks if one string endsWith another string. Optional position parameter to offset searching before a certain index.
+ *
+ * @param str - The string that might contain the target string.
+ * @param target - The string to search for.
+ * @param position - An optional position from the start to search up to this index
+ * @returns True if the str string ends with the target string.
+ *
+ * @example
+ * const isPrefix = endsWith('fooBar', 'foo') // returns true
+ * const isPrefix = endsWith('fooBar', 'bar') // returns false
+ * const isPrefix = endsWith('fooBar', 'abc') // returns false
+ * const isPrefix = endsWith('fooBar', 'foo', 3) // returns true
+ * const isPrefix = endsWith('fooBar', 'abc', 5) // returns false
+ */
+declare function endsWith(str?: string, target?: string, position?: number): boolean;
+//#endregion
+export { endsWith };