Reject reasoning text in session titles

backend/api/server.py

@@ -1725,6 +1725,9 @@ def create_app(state: AgentState) -> FastAPI:
             ):
                 continue
             title = session_metadata.get('title')
+            title_source = session_metadata.get('title_source')
+            if isinstance(title, str) and title_source != 'manual':
+                title = _clean_session_title(title)
             if not isinstance(title, str) or not title.strip():
                 title = None
             preview = ''
@@ -3917,6 +3920,8 @@ def _read_session_title(directory: Path, session_id: str | None) -> str | None:
         return None
     title = metadata.get('title')
     if isinstance(title, str) and title.strip():
+        if metadata.get('title_source') != 'manual':
+            return _clean_session_title(title)
         return title.strip()
     return None
 
@@ -4044,8 +4049,30 @@ def _generate_session_title(
 
 
 def _clean_session_title(value: str) -> str | None:
-    title = ' '.join(value.strip().strip('"\'“”‘’`').split())
+    raw = value.strip()
+    if not raw:
+        return None
+    raw = re.sub(r'(?is)<analysis>.*?</analysis>', '', raw)
+    raw = re.sub(r'(?is)<think>.*?</think>', '', raw)
+    if re.search(r'(?i)<\s*(analysis|think)\b', raw):
+        return None
+    lines = [line.strip() for line in raw.replace('\r', '\n').split('\n')]
+    title = next((line for line in reversed(lines) if line), '')
+    title = re.sub(r'^\s*(?:[-*#>\d.、\s]+)', '', title)
+    title = re.sub(
+        r'^(?:会话标题|标题|短标题|生成标题|session title)\s*[:：]\s*',
+        '',
+        title,
+        flags=re.IGNORECASE,
+    )
+    title = title.strip().strip('"\'“”‘’`*_ ')
+    title = re.sub(r'\*\*(.*?)\*\*', r'\1', title)
+    title = ' '.join(title.split())
     title = title.rstrip('。.!！?？')
+    if re.search(r'(?i)\b(generating|generate|thinking|reasoning)\b', title):
+        return None
+    if '<' in title or '>' in title:
+        return None
     if not title:
         return None
     return title[:24].rstrip()