feat: 新增 compute_gateway、compute_poller、agent 模块，重构前端 dist

- 新增 backend/app/modules/compute_gateway（client/sync）计算网关模块
- 新增 backend/app/workers/compute_poller 计算轮询 worker
- 新增 compute/agent/process_manager 进程管理器
- 新增 scripts/ 脚本目录
- 更新 Docker 部署配置（app/compute/nginx）
- 更新后端平台 API、数据库 SQL、core 配置
- 更新前端多个视图组件及 API 模块
- 重构 frontend/dist 构建产物（新 hash）
- 更新多项文档

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

docker/app/docker-compose.yml

@@ -21,6 +21,8 @@ services:
           ls -la /usr/share/nginx/html;
           exit 1;
         fi;
+        envsubst '$$BACKEND_PROXY_PASS' < /etc/nginx/templates/default.conf.template > /etc/nginx/conf.d/default.conf;
+        nginx -t;
         nginx -g 'daemon off;'
     networks:
       - yg-ft-app
@@ -58,8 +60,9 @@ services:
       FILE_GATEWAY_BASE_URL: ${FILE_GATEWAY_BASE_URL:-http://compute-api:9101}
       COMPUTE_MODE: ${COMPUTE_MODE:-real}
       COMPUTE_STATUS_SYNC_MODE: ${COMPUTE_STATUS_SYNC_MODE:-polling}
-      COMPUTE_POLL_INTERVAL_SECONDS: ${COMPUTE_POLL_INTERVAL_SECONDS:-10}
+      COMPUTE_POLL_INTERVAL_SECONDS: ${COMPUTE_POLL_INTERVAL_SECONDS:-3}
       COMPUTE_POLL_BATCH_SIZE: ${COMPUTE_POLL_BATCH_SIZE:-100}
+      COMPUTE_REQUEST_TIMEOUT_SECONDS: ${COMPUTE_REQUEST_TIMEOUT_SECONDS:-5}
       PYTHONPATH: /app
     volumes:
       - ../../backend:/app:ro