Merge PR #3055

CHANGELOG.md

@@ -3,6 +3,10 @@
 
 ## [Unreleased]
 
+### Changed
+
+- Local fallback title generation no longer has a German-only `Session Bilder` special case; it now uses the same generic topic extraction path as other fallback titles. (Refs #3040)
+
 ## [v0.51.152] — 2026-05-28 — Release DX (stage-batch34 — single-PR optional gateway-backed browser chat)
 
 ### Added

api/streaming.py

@@ -1869,13 +1869,6 @@ def _fallback_title_from_exchange(user_text: str, assistant_text: str) -> Option
     assistant_text = re.sub(r'\s+', ' ', assistant_text).strip()
     combined = f"{user_text} {assistant_text}".strip().lower()
     combined_raw = f"{user_text} {assistant_text}".strip()
-    source_lang = _detect_title_language(user_text)
-
-    if source_lang == 'de' and 'bilder' in combined and 'session' in combined:
-        if 'alt' in combined or 'alte' in combined or 'alten' in combined:
-            return 'Alte Session Bilder'
-        return 'Session Bilder'
-
     def _contains_latin(text: str) -> bool:
         return bool(re.search(r'[A-Za-z]', text or ''))
 

tests/test_title_aux_routing.py

@@ -253,7 +253,7 @@ class TestGenerateTitleRawViaAuxTimeout(unittest.TestCase):
         self.assertEqual(status, 'llm_language_mismatch_aux')
         self.assertEqual(raw_preview, 'Old Session Image Display Issue')
 
-    def test_german_fallback_keeps_german_topic_words(self):
+    def test_german_fallback_uses_generic_topic_extraction_without_literal_override(self):
         from api.streaming import _fallback_title_from_exchange
 
         title = _fallback_title_from_exchange(
@@ -261,7 +261,11 @@ class TestGenerateTitleRawViaAuxTimeout(unittest.TestCase):
             'Ich prüfe die Rendering- und Attachment-Pfade im WebUI.',
         )
 
-        self.assertEqual(title, 'Alte Session Bilder')
+        self.assertIsNotNone(title)
+        self.assertIsInstance(title, str)
+        self.assertNotEqual(title, 'Alte Session Bilder')
+        self.assertNotEqual(title, 'Session Bilder')
+        self.assertIn('Warum', title)
 
     def test_configured_api_key_is_not_sent_to_caller_supplied_route(self):
         """Regression: title task keys must not leak to explicit fallback routes.