Format Cosmos3 world-model files

Apply the repository Ruff formatter to resolve CI formatting findings.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Copilot-Session: 997ab62c-69cb-4802-a5c6-fddd51bfd583
Signed-off-by: Xiaoyu Zhang <xiaoyuzhang@microsoft.com>

Author: xiaoyu-work

src/mobius/_cosmos3_edge_world_model.py

@@ -240,9 +240,7 @@ def build_cosmos3_edge_world_model(
     negative_prompt_asset = "assets/negative_prompt.json"
     i2v_prompt: dict[str, Any] = {
         "positive": "json_or_text",
-        "negative_default": (
-            "asset" if negative_prompt_asset in assets else "empty"
-        ),
+        "negative_default": ("asset" if negative_prompt_asset in assets else "empty"),
         "add_resolution_template": False,
         "add_duration_template": False,
         "use_system_prompt": False,

src/mobius/_cosmos3_world_model_test.py

@@ -488,9 +488,7 @@ def test_manifest_carries_generation_and_pipeline_config(tmp_path) -> None:
         "use_karras_sigmas",
     ]
     video_handoff = package.manifest.metadata["conditioning_handoffs"]["video"]
-    assert video_handoff["parameters"]["channel_order"] == (
-        "patch_height_patch_width_channel"
-    )
+    assert video_handoff["parameters"]["channel_order"] == ("patch_height_patch_width_channel")
     assert package.manifest.metadata["profile"] == "world-model"
     assert package.manifest.metadata["model_type"] == "cosmos3_edge"
     assert package.manifest.metadata["source"] == "example/world-4Step"