chore: 初始版本提交 - 简化架构 + 轮询改造

- 移除 Motia Streams 实时通信，改用 3 秒轮询
- 简化前端代码，移除冗余组件
- 简化后端架构，准备 FastAPI 重构
- 更新 pixi.toml 环境配置
- 保留 bttoxin_digger_v5_repro 作为参考文档

Co-Authored-By: Claude <noreply@anthropic.com>

bttoxin_digger_v5_repro/pixi.toml

@@ -0,0 +1,13 @@
+[workspace]
+name = "bttoxin_digger_v5_repro"
+channels = ["bioconda", "conda-forge", "bioconda/label/cf201901"]
+platforms = ["linux-64"]
+version = "0.1.0"
+channel-priority = "disabled"
+
+[dependencies]
+bttoxin_digger = "==1.0.10"
+perl = "==5.26.2"
+perl-file-tee = "==0.07"
+perl-list-util = "==1.38"
+blast = "==2.16.0"