feat: 支持绑定外部 bt_toxin 数据库 (2025-11-04 更新)

- docker_client.py: run_bttoxin_digger() 新增 bttoxin_db_dir 参数，支持挂载外部数据库
- run_single_fna_pipeline.py: 新增 --bttoxin_db_dir 参数，自动检测 external_dbs/bt_toxin
- README.md: 添加 bttoxin_db 更新说明和 Docker 绑定文档
- external_dbs/bt_toxin: 添加 2025-11-04 版本数据库文件

测试验证: HAN055 样本毒素命名版本号变化 (Cry2Aa9→22, Cry2Ab35→41, Cry1Ia40→42, Vip3Aa7→79)

frontend/package.json

@@ -1,22 +0,0 @@
-{
-  "name": "bttoxin-frontend",
-  "version": "1.0.0",
-  "type": "module",
-  "scripts": {
-    "dev": "vite",
-    "build": "vite build",
-    "preview": "vite preview"
-  },
-  "dependencies": {
-    "vue": "^3.5.13",
-    "vue-router": "^4.5.0",
-    "pinia": "^2.3.0",
-    "axios": "^1.7.9",
-    "naive-ui": "^2.40.1",
-    "@vicons/ionicons5": "^0.12.0"
-  },
-  "devDependencies": {
-    "@vitejs/plugin-vue": "^5.2.1",
-    "vite": "^6.0.5"
-  }
-}