Rewrite frontend as single self-contained HTML file — all CSS/JS inline, no external files to fail loading

dist/utils/configUtils.d.ts

@@ -0,0 +1,13 @@
+import { Config } from '../config/config';
+/**
+ * Load configuration from a JSON file
+ * @param filePath - Path to the configuration file
+ * @returns Configuration object
+ */
+export declare function loadConfigFromFile(filePath: string): Partial<Config>;
+/**
+ * Save configuration to a JSON file
+ * @param filePath - Path to save the configuration file
+ * @param config - Configuration object to save
+ */
+export declare function saveConfigToFile(filePath: string, config: any): void;