feat: Docker内pdf2zh翻译跑通 + 批量翻译

- Dockerfile: libgl1-mesa-glx→libgl1, libglib2.0-0→libglib2.0-0t64
- batch_docker.py: 容器内批量翻译脚本(thread=2)
- 模型预下载到 models/ 目录纳入镜像
- 修复索引模板多次修改导致的混乱
- 底栏 spdis链接 + DeepSeek维护说明

api/batch_translate.py

@@ -52,7 +52,7 @@ for arxiv_id in papers:
         translate(
             [pdf_path], output=TRANSLATED_DIR,
             lang_in='en', lang_out='zh',
-            service='deepseek', thread=4, model=model,
+            service='deepseek', model=model,
         )
         mono = os.path.join(TRANSLATED_DIR, f"{arxiv_id}-mono.pdf")
         dual = os.path.join(TRANSLATED_DIR, f"{arxiv_id}-dual.pdf")