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>

docker/compose/docker-compose.simple.yml

@@ -0,0 +1,28 @@
+services:
+  # 单容器部署： Nginx + Backend + Frontend
+  bttoxin:
+    image: ghcr.io/prefix-dev/pixi:latest
+    container_name: bttoxin-pipeline
+    ports:
+      - "8888:80"      # 使用 8888 端口避免与 traefik 冲突
+    volumes:
+      - ../../jobs:/app/jobs
+      - ../../frontend/dist:/var/www/html
+      - ../../backend:/app/backend
+      - ../../web:/app/web
+      - ../../Data:/app/Data
+      - ../../scripts:/app/scripts
+      - ../../pixi.toml:/app/pixi.toml
+      - ../nginx/default.conf:/etc/nginx/sites-available/default:ro
+      - ../scripts/entrypoint.sh:/app/entrypoint.sh:ro
+    working_dir: /app
+    environment:
+      - JOBS_DIR=/app/jobs
+      - API_BASE_URL=${API_BASE_URL:-http://your-domain.com}
+    entrypoint: ["/bin/bash", "/app/entrypoint.sh"]
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+    restart: unless-stopped