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

dist/providers/tts/openAITTSProvider.d.ts

@@ -0,0 +1,17 @@
+import { TTSProvider, TTSProviderConfig, TTSOptions, TTSResult } from '../../interfaces';
+/**
+ * OpenAI TTS Provider Implementation
+ */
+export declare class OpenAITTSProvider implements TTSProvider {
+    private config;
+    private openai;
+    constructor(config: TTSProviderConfig);
+    /**
+     * Convert text to speech
+     * @param text - Text to convert to speech
+     * @param outputPath - Output path for the audio file
+     * @param options - Additional options
+     * @returns Duration of the generated audio in seconds and cost
+     */
+    textToSpeech(text: string, outputPath: string, options?: TTSOptions): Promise<TTSResult>;
+}