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/app/api/providers/validate/route.js

@@ -40,6 +40,43 @@ async function probeWebProvider(provider, apiKey) {
   return res.status !== 401 && res.status !== 403;
 }
 
+// Probe a tts/embedding provider using ttsConfig/embeddingConfig.
+// Returns true if API key is accepted (status !== 401 && !== 403); null to skip.
+async function probeMediaProvider(provider, apiKey) {
+  const p = AI_PROVIDERS[provider];
+  if (!p) return null;
+  // Only probe providers that are media-only (not LLM dual-purpose, let LLM validate handle those)
+  const kinds = p.serviceKinds || ["llm"];
+  const isMediaOnly = kinds.every((k) => k === "tts" || k === "embedding" || k === "stt");
+  if (!isMediaOnly) return null;
+  const cfg = p.ttsConfig || p.embeddingConfig;
+  if (!cfg) return null;
+  if (p.noAuth || cfg.authType === "none") return true;
+  // Skip auth schemes that need provider-specific data
+  if (cfg.authHeader === "playht" || cfg.authHeader === "aws-sigv4") return null;
+
+  const headers = { "Content-Type": "application/json" };
+
+  // Apply auth based on authHeader
+  switch (cfg.authHeader) {
+    case "bearer":     headers["Authorization"] = `Bearer ${apiKey}`; break;
+    case "x-api-key":  headers["x-api-key"] = apiKey; break;
+    case "xi-api-key": headers["xi-api-key"] = apiKey; break;
+    case "token":      headers["Authorization"] = `Token ${apiKey}`; break;
+    case "basic":      headers["Authorization"] = `Basic ${apiKey}`; break;
+    default: return null;
+  }
+
+  // Minimal POST body — server will reject auth before validating body
+  const res = await fetch(cfg.baseUrl, {
+    method: "POST",
+    headers,
+    body: JSON.stringify({ input: "ping", text: "ping", model: cfg.models?.[0]?.id || "test" }),
+    signal: AbortSignal.timeout(8000),
+  });
+  return res.status !== 401 && res.status !== 403;
+}
+
 // POST /api/providers/validate - Validate API key with provider
 export async function POST(request) {
   try {
@@ -192,6 +229,15 @@ export async function POST(request) {
         });
       }
 
+      // Generic probe for tts/embedding providers (config-driven)
+      const mediaResult = await probeMediaProvider(provider, apiKey);
+      if (mediaResult !== null) {
+        return NextResponse.json({
+          valid: mediaResult,
+          error: mediaResult ? null : "Invalid API key",
+        });
+      }
+
       switch (provider) {
         case "openai":
           const openaiRes = await fetch("https://api.openai.com/v1/models", {