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.

start.bat

@@ -14,22 +14,27 @@ rem See the License for the specific language governing permissions and
 rem limitations under the License.
 
 chcp 65001 >nul 2>&1
-setlocal EnableDelayedExpansion
+setlocal DisableDelayedExpansion
 title Artemis Mobile Agent UI
 
-cd /d "%~dp0"
+pushd "%~dp0" || exit /b 1
 
 echo ======================================================
 echo       Artemis Autonomous Mobile Agent UI
 echo ======================================================
 echo.
 
-rem Run the PowerShell bootstrap with execution policy bypass
+rem First run installs uv/Python/.venv as needed; later runs reuse them.
+rem Use start.bat -SetupOnly to prepare Python without launching the UI.
+rem Use start-cn.bat or start.bat -Mirror China for China download mirrors.
 powershell -NoProfile -ExecutionPolicy Bypass -File "%~dp0scripts\start.ps1" %*
+set "ARTEMIS_EXIT_CODE=%ERRORLEVEL%"
 
-if %ERRORLEVEL% NEQ 0 (
+if not "%ARTEMIS_EXIT_CODE%"=="0" (
     echo.
     echo An error occurred while starting Artemis.
-    pause
+    if not defined ARTEMIS_NO_PAUSE pause
 )
+popd
+endlocal & exit /b %ARTEMIS_EXIT_CODE%