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.yml

@@ -0,0 +1,74 @@
+version: '3.8'
+
+services:
+  # Production deployment (all-in-one container with Nginx reverse proxy)
+  bttoxin:
+    build:
+      context: ../..
+      dockerfile: docker/dockerfiles/Dockerfile
+    container_name: bttoxin-pipeline
+    ports:
+      - "80:80"
+    volumes:
+      - ../../jobs:/app/jobs
+      - ../nginx/default.conf:/etc/nginx/sites-available/default:ro
+    environment:
+      - JOBS_DIR=/app/jobs
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+
+  # Development mode (source code mounted for hot reload)
+  bttoxin-dev:
+    image: ghcr.io/prefix-dev/pixi:latest
+    container_name: bttoxin-dev
+    ports:
+      - "5180:5173"
+      - "8010:8000"
+    volumes:
+      - ../..:/app
+      - ../../jobs:/app/jobs
+    working_dir: /app
+    environment:
+      - JOBS_DIR=/app/jobs
+      # Use relative path for dev (Vite proxy handles /api)
+      - VITE_API_BASE_URL=
+    command: >
+      bash -c "
+        mkdir -p /app/jobs &&
+        pixi shell-hook -e webbackend > /app/activate_backend.sh &&
+        echo 'exec uvicorn backend.app.main:app --reload --host 0.0.0.0 --port 8000 \"\$@\"' >> /app/activate_backend.sh &&
+        bash /app/activate_backend.sh &
+        sleep 5 &&
+        cd /app/frontend && pnpm dev --host --port 5173 &
+        wait
+      "
+    restart: unless-stopped
+
+  # Production with separate containers (if needed for scaling)
+  bttoxin-frontend:
+    image: nginx:alpine
+    container_name: bttoxin-frontend
+    ports:
+      - "8080:80"
+    volumes:
+      - ../../dist:/usr/share/nginx/html:ro
+    environment:
+      - NGINX_HOST=localhost
+    restart: unless-stopped
+
+  bttoxin-backend:
+    image: ghcr.io/prefix-dev/pixi:latest
+    container_name: bttoxin-backend
+    ports:
+      - "8000:8000"
+    volumes:
+      - ../../jobs:/app/jobs
+    working_dir: /app
+    environment:
+      - JOBS_DIR=/app/jobs
+    command: uvicorn web.backend.main:app --host 0.0.0.0 --port 8000
+    restart: unless-stopped