[Bugfix] Treat unsharded model.safetensors as HF weights in Mistral-native format detection (#33671)

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

python/sglang/srt/server_args.py

@@ -7330,7 +7330,7 @@ class ServerArgs:
         """True iff the checkpoint requires load_format=mistral.
 
         Looks for consolidated*.safetensors with no competing
-        model-*.safetensors; when both weight formats ship in the
+        model*.safetensors; when both weight formats ship in the
         same checkpoint (e.g. Mistral-7B-Instruct-v0.3) the HF path is
         preferred to avoid loading Mistral-named weights into an
         HF-named architecture.
@@ -7363,7 +7363,7 @@ class ServerArgs:
                     )
                 ),
                 has_hf_weights=bool(
-                    glob.glob(os.path.join(self.model_path, "model-*.safetensors"))
+                    glob.glob(os.path.join(self.model_path, "model*.safetensors"))
                 ),
             )
 
@@ -7378,7 +7378,10 @@ class ServerArgs:
                     for f in files
                 ),
                 has_hf_weights=any(
-                    f.startswith("model-") and f.endswith(".safetensors") for f in files
+                    f.startswith("model")
+                    and f.endswith(".safetensors")
+                    and "/" not in f
+                    for f in files
                 ),
             )
         except Exception: