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.

artemis/agents/validator/tool_declarations.py

@@ -23,7 +23,6 @@ import base64
 import json
 from typing import Any, Literal
 
-from google.genai import types as genai_types
 from langchain_core.messages import ToolMessage
 from pydantic import BaseModel, Field
 
@@ -99,44 +98,6 @@ def prune_intermediate_screenshots(messages: list[Any]) -> None:
     if not messages:
         return
 
-    # Check for google.genai.types.Content objects
-    if hasattr(messages[0], "parts"):
-        user_indices_with_images = []
-        for idx in range(1, len(messages)):
-            content = messages[idx]
-            if getattr(content, "role", None) == "user" and getattr(content, "parts", None):
-                for part in content.parts:
-                    if getattr(part, "inline_data", None) is not None:
-                        user_indices_with_images.append(idx)
-                        break
-
-        if len(user_indices_with_images) > 1:
-            indices_to_prune = user_indices_with_images[:-1]
-            for idx in indices_to_prune:
-                content = messages[idx]
-                new_parts = []
-                for part in content.parts:
-                    if getattr(part, "inline_data", None) is not None:
-                        try:
-                            new_parts.append(
-                                genai_types.Part.from_text(
-                                    text=(
-                                        "[Screenshot of intermediate step omitted for performance]"
-                                    )
-                                )
-                            )
-                        except Exception as exc:
-                            logger.debug(
-                                "Could not build placeholder text part for pruned screenshot;"
-                                " dropping it: %s",
-                                exc,
-                                exc_info=True,
-                            )
-                    else:
-                        new_parts.append(part)
-                content.parts = new_parts
-        return
-
     # LangChain BaseMessage format
     last_img_msg_idx = -1
     for idx in range(len(messages) - 1, -1, -1):