fix: improve streaming, alarms, and AI TTS

app/core/ai.py

@@ -283,11 +283,7 @@ def _extract_response_content(cfg, data: dict) -> str:
 
 
 def _iter_openai_compatible_stream(response):
-    for line in response.iter_lines(decode_unicode=True):
-        if not line or not line.startswith("data:"):
-            continue
-
-        data_str = line[5:].strip()
+    for data_str in _iter_sse_data_lines(response):
         if data_str == "[DONE]":
             break
 
@@ -317,11 +313,7 @@ def _iter_openai_compatible_stream(response):
 
 
 def _iter_anthropic_stream(response):
-    for line in response.iter_lines(decode_unicode=True):
-        if not line or not line.startswith("data:"):
-            continue
-
-        data_str = line[5:].strip()
+    for data_str in _iter_sse_data_lines(response):
         if data_str == "[DONE]":
             break
 
@@ -344,6 +336,28 @@ def _iter_anthropic_stream(response):
                 yield str(text)
 
 
+def _iter_sse_data_lines(response):
+    """
+    Читает SSE-стрим и возвращает только payload после "data:".
+    Явно декодируем как UTF-8, чтобы избежать mojibake вида "Пр...".
+    """
+    for raw_line in response.iter_lines(decode_unicode=False):
+        if not raw_line:
+            continue
+
+        if isinstance(raw_line, bytes):
+            line = raw_line.decode("utf-8", errors="replace")
+        else:
+            line = str(raw_line)
+
+        if not line.startswith("data:"):
+            continue
+
+        data_str = line[5:].strip()
+        if data_str:
+            yield data_str
+
+
 def _iter_stream_chunks(cfg, response):
     if cfg["protocol"] == "anthropic":
         yield from _iter_anthropic_stream(response)