fix(chat): detect bare-named Qwen3.6 tags as vision-capable

src/chat_helpers.py

@@ -61,6 +61,11 @@ def extract_urls(text: str) -> List[str]:
     "phi-4", "phi4",
     # zhipu / glm (glm-4.5v, glm-4.6v, glm-5v-turbo, etc.)
     "glm-4.5v", "glm-4.6v", "glm-5v",
+    # Qwen3.6 is natively multimodal under its bare names: every checkpoint in
+    # the family (Qwen3.6-27B, Qwen3.6-35B-A3B) ships a vision encoder and is
+    # published as image-text-to-text; there is no separate Qwen3.6-VL line, so
+    # the qwen*-vl keywords above never match these tags.
+    "qwen3.6",
 )
 # Catches the "*-VL-*" / "*VL*" family not covered by a literal keyword above
 # (e.g. Qwen2.5-VL and various tags): a standalone "vl" token, plus "vlm".

tests/test_vision_model_detection.py

@@ -38,11 +38,15 @@ def test_recognizes_multimodal_families_without_vision_in_name():
         "llama4:scout", "llama4", "llama-4-maverick",
         "mistral-small3.1", "mistral-small-3.2",
         "phi-4-multimodal", "phi4-multimodal",
+        # Qwen3.6 ships a vision encoder in every bare-named checkpoint
+        # (no separate VL variant), so plain tags must pass through images.
+        "qwen3.6", "qwen3.6:27b", "qwen3.6-35b-a3b",
     ]:
         assert is_vision_model(name), f"{name!r} should be detected as vision-capable"
 
 
 def test_new_keywords_do_not_overmatch_text_models():
     # The added families must not flag their text-only siblings.
-    for name in ["gemma2:9b", "gemma:7b", "llama3.3", "mistral-small", "phi-3-mini"]:
+    for name in ["gemma2:9b", "gemma:7b", "llama3.3", "mistral-small", "phi-3-mini",
+                 "qwen3:8b", "qwen2.5:14b"]:
         assert not is_vision_model(name), f"{name!r} should not be flagged as vision"