Update version to 0.4.9, enhance README with Trendshift badge, and add new embedding models to providerModels.js. Refactor TTS handling to support additional providers and improve API key validation for media providers.

src/sse/handlers/tts.js

@@ -7,10 +7,15 @@ import { getModelInfo } from "../services/model.js";
 import { handleTtsCore } from "open-sse/handlers/ttsCore.js";
 import { errorResponse, unavailableResponse } from "open-sse/utils/error.js";
 import { HTTP_STATUS } from "open-sse/config/runtimeConfig.js";
+import { AI_PROVIDERS } from "@/shared/constants/providers";
 import * as log from "../utils/logger.js";
 
-// Providers that require stored credentials (not noAuth)
-const CREDENTIALED_PROVIDERS = new Set(["openai", "elevenlabs", "openrouter"]);
+// Derived from providers.js: any TTS provider not noAuth requires stored credentials
+const CREDENTIALED_PROVIDERS = new Set(
+  Object.entries(AI_PROVIDERS)
+    .filter(([, p]) => p.serviceKinds?.includes("tts") && !p.noAuth && p.ttsConfig?.authType !== "none")
+    .map(([id]) => id)
+);
 
 export async function handleTts(request) {
   let body;