feat: add Chinese UI, Responses models, and mirrored Windows setup

Localize the web console and persist custom model and capability settings.
Use OpenAI Responses exclusively and move runtime limits into environment configuration.
Bootstrap uv and the virtual environment on Windows, support optional China mirrors,
and package source distributions without environments, build output, or credentials.

Update regression tests and repository quality checks for the new behavior.

tests/unit/admin_console/test_model_service.py

@@ -25,7 +25,7 @@ def test_get_active_model_info_pro_architecture():
     info = ModelService.get_active_model_info("pro")
     assert info["name"] == "Pro"
     assert info["architecture"] == "ARTEMIS Pro"
-    assert info["provider"] == "google"
+    assert info["provider"] == "openai"
     assert "id" in info
 
 
@@ -34,7 +34,7 @@ def test_get_active_model_info_flash_architecture():
     info = ModelService.get_active_model_info("flash")
     assert info["name"] == "Flash"
     assert info["architecture"] == "ARTEMIS Flash"
-    assert info["provider"] == "google"
+    assert info["provider"] == "openai"
 
 
 def test_resolve_session_profile_from_device_info():