fix: /tts_stream als GET mit Query-Params (war 405 Method Not Allowed)

daswer123 xtts-api-server hat /tts_stream nur als GET:
  allow: GET → POST gab 405 → Request hing.

Umstellung:
- method: 'GET'
- text/language/speaker_wav/stream_chunk_size als URLSearchParams
  im Query-String
- kein body mehr (kein req.write, kein Content-Length)

Ab jetzt echter streaming-Flow: Samples kommen waehrend XTTS noch
rendert, time-to-first-audio ~300-500ms.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

xtts/bridge.js

@@ -195,32 +195,27 @@ async function _runTTSRequest(payload) {
 }
 
 /**
- * Ruft /tts_stream auf — echter Streaming-Endpoint von daswer123.
- * Chunked Transfer-Encoding: Samples kommen WAEHREND XTTS rendert,
- * nicht erst am Ende. Time-to-first-audio ~300-500ms statt 2-3s.
+ * Ruft /tts_stream (GET) auf — echter Streaming-Endpoint bei daswer123.
+ * Samples fliessen waehrend XTTS rendert (chunked transfer).
+ * Time-to-first-audio ~300-500ms statt 2-4s beim batch-Endpoint.
  *
- * stream_chunk_size = Characters pro Render-Iteration.
- * 40 = guter Kompromiss zwischen Schnellstart und GPU-Effizienz.
+ * Parameter werden als Query-String uebergeben (GET-API).
  */
 function streamXTTSAsPCM(text, language, speakerWav, onPcmChunk) {
   return new Promise((resolve, reject) => {
-    const body = JSON.stringify({
+    const qs = new URLSearchParams({
       text,
-      language,
-      speaker_wav: speakerWav || "",
-      stream_chunk_size: 40,
+      language: language || "de",
+      speaker_wav: speakerWav ? speakerWav : "",
+      stream_chunk_size: "40",
     });
 
-    const url = new URL(`${XTTS_API_URL}/tts_stream`);
+    const url = new URL(`${XTTS_API_URL}/tts_stream?${qs.toString()}`);
     const options = {
       hostname: url.hostname,
       port: url.port,
-      path: url.pathname,
-      method: "POST",
-      headers: {
-        "Content-Type": "application/json",
-        "Content-Length": Buffer.byteLength(body),
-      },
+      path: `${url.pathname}?${url.searchParams.toString()}`,
+      method: "GET",
       timeout: 60000,
     };
 
@@ -282,7 +277,6 @@ function streamXTTSAsPCM(text, language, speakerWav, onPcmChunk) {
 
     req.on("error", reject);
     req.on("timeout", () => { req.destroy(); reject(new Error("XTTS API Timeout (60s)")); });
-    req.write(body);
     req.end();
   });
 }