Feat:support tts in agent (#11675)

### What problem does this PR solve?

change:
support tts in agent

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

api/db/services/dialog_service.py

@@ -761,13 +761,48 @@ Please write the SQL, only SQL, without any other explanations or text.
         "prompt": sys_prompt,
     }
 
+def clean_tts_text(text: str) -> str:
+    if not text:
+        return ""
+
+    text = text.encode("utf-8", "ignore").decode("utf-8", "ignore")
+
+    text = re.sub(r"[\x00-\x08\x0B-\x0C\x0E-\x1F\x7F]", "", text)
+
+    emoji_pattern = re.compile(
+        "[\U0001F600-\U0001F64F"
+        "\U0001F300-\U0001F5FF"
+        "\U0001F680-\U0001F6FF"
+        "\U0001F1E0-\U0001F1FF"
+        "\U00002700-\U000027BF"
+        "\U0001F900-\U0001F9FF"
+        "\U0001FA70-\U0001FAFF"
+        "\U0001FAD0-\U0001FAFF]+",
+        flags=re.UNICODE
+    )
+    text = emoji_pattern.sub("", text)
+
+    text = re.sub(r"\s+", " ", text).strip()
+
+    MAX_LEN = 500
+    if len(text) > MAX_LEN:
+        text = text[:MAX_LEN]
+
+    return text
 
 def tts(tts_mdl, text):
     if not tts_mdl or not text:
         return None
+    text = clean_tts_text(text)
+    if not text:
+        return None
     bin = b""
-    for chunk in tts_mdl.tts(text):
-        bin += chunk
+    try:
+        for chunk in tts_mdl.tts(text):
+            bin += chunk
+    except Exception as e:
+        logging.error(f"TTS failed: {e}, text={text!r}")
+        return None
     return binascii.hexlify(bin).decode("utf-8")