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/predicate/isFile.js

@@ -0,0 +1,26 @@
+const require_isBlob = require("./isBlob.js");
+//#region src/predicate/isFile.ts
+/**
+* Checks if the given value is a File.
+*
+* This function tests whether the provided value is an instance of `File`.
+* It returns `true` if the value is an instance of `File`, and `false` otherwise.
+*
+* @param x - The value to test if it is a File.
+* @returns True if the value is a File, false otherwise.
+*
+* @example
+* const value1 = new File(["content"], "example.txt");
+* const value2 = {};
+* const value3 = new Blob(["content"], { type: "text/plain" });
+*
+* console.log(isFile(value1)); // true
+* console.log(isFile(value2)); // false
+* console.log(isFile(value3)); // false
+*/
+function isFile(x) {
+	if (typeof File === "undefined") return false;
+	return require_isBlob.isBlob(x) && x instanceof File;
+}
+//#endregion
+exports.isFile = isFile;