improve(tts-voice): use spawnSync args to avoid shell quoting issues

skills/tts-voice/handler.ts

@@ -8,7 +8,7 @@
  *   - curl CLI
  */
 
-import { execSync } from 'child_process';
+import { execSync, spawnSync } from 'child_process';
 import { readFileSync, existsSync, unlinkSync } from 'fs';
 
 const LUXTTS_BASE = 'http://localhost:7860';
@@ -113,19 +113,28 @@ function generateSpeech(text: string, params: TtsParams): string | null {
   const outPath = `/tmp/tts_output_${timestamp}.wav`;
 
   try {
-    const httpCode = execSync(
-      `curl -s -o ${outPath} -w "%{http_code}" ` +
-      `-b ${COOKIE_JAR} ` +
-      `-X POST ${LUXTTS_BASE}/luxtts/api/tts ` +
-      `-F "ref_audio=@${REF_AUDIO}" ` +
-      `-F "text=${text.replace(/"/g, '\\"')}" ` +
-      `-F "num_steps=${params.numSteps}" ` +
-      `-F "t_shift=${params.tShift}" ` +
-      `-F "speed=${params.speed}"`,
-      { timeout: 120000 }  // 2 min timeout for CPU synthesis
-    ).toString().trim();
+    const args = [
+      '-s',
+      '-o', outPath,
+      '-w', '%{http_code}',
+      '-b', COOKIE_JAR,
+      '-X', 'POST',
+      `${LUXTTS_BASE}/luxtts/api/tts`,
+      '-F', `ref_audio=@${REF_AUDIO}`,
+      '-F', `text=${text}`,
+      '-F', `num_steps=${params.numSteps}`,
+      '-F', `t_shift=${params.tShift}`,
+      '-F', `speed=${params.speed}`,
+    ];
 
-    if (httpCode === '200' && existsSync(outPath)) {
+    const result = spawnSync('curl', args, {
+      timeout: 120000, // 2 min timeout for CPU synthesis
+      encoding: 'utf-8',
+    });
+
+    const httpCode = (result.stdout || '').trim();
+
+    if (result.status === 0 && httpCode === '200' && existsSync(outPath)) {
       return outPath;
     }