Fix: Add ImportLDraw auto-download and verification logic

Dockerfile

@@ -64,6 +64,22 @@ WORKDIR $HOME/app
 # 复制项目文件
 COPY --chown=user . $HOME/app
 
+# 验证 ImportLDraw 插件，若不存在则下载
+RUN if [ ! -d "$HOME/app/code/ImportLDraw" ] || [ ! -f "$HOME/app/code/ImportLDraw/__init__.py" ]; then \
+    echo "⚠️  ImportLDraw not found in repo, downloading..."; \
+    wget -q https://github.com/TobyLobster/ImportLDraw/archive/refs/tags/v1.2.1.zip -O /tmp/importldraw.zip && \
+    unzip -q /tmp/importldraw.zip -d /tmp/ && \
+    mv /tmp/ImportLDraw-1.2.1 $HOME/app/code/ImportLDraw && \
+    rm /tmp/importldraw.zip && \
+    echo "✅ ImportLDraw downloaded successfully"; \
+else \
+    echo "✅ ImportLDraw found in repo"; \
+fi
+
+# 验证插件已正确部署
+RUN ls -la $HOME/app/code/ImportLDraw/__init__.py || \
+    (echo "❌ ImportLDraw deployment failed" && exit 1)
+
 # 安装 Python 依赖
 RUN pip install --no-cache-dir --upgrade pip && \
     pip install --no-cache-dir -r requirements.txt