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/util/toPath.d.ts

@@ -0,0 +1,21 @@
+//#region src/compat/util/toPath.d.ts
+/**
+ * Converts a deep key string into an array of path segments.
+ *
+ * This function takes a string representing a deep key (e.g., 'a.b.c' or 'a[b][c]') and breaks it down into an array of strings, each representing a segment of the path.
+ *
+ * @param deepKey - The deep key string to convert.
+ * @returns An array of strings, each representing a segment of the path.
+ *
+ * Examples:
+ *
+ * toPath('a.b.c') // Returns ['a', 'b', 'c']
+ * toPath('a[b][c]') // Returns ['a', 'b', 'c']
+ * toPath('.a.b.c') // Returns ['', 'a', 'b', 'c']
+ * toPath('a["b.c"].d') // Returns ['a', 'b.c', 'd']
+ * toPath('') // Returns []
+ * toPath('.a[b].c.d[e]["f.g"].h') // Returns ['', 'a', 'b', 'c', 'd', 'e', 'f.g', 'h']
+ */
+declare function toPath(deepKey: any): string[];
+//#endregion
+export { toPath };