feat(courseware,docs): 完善课件传输与岛编辑并统一全仓文档

- 增加课件上传、班级可见范围、设备补收与传输进度
- 整合自定义灵动岛编辑器和相关客户端交互
- 同步三端契约、数据库迁移、部署配置与隔离回归
- 按源码统一文档与官网说明，移除过时任务书和审查记录
- 保持产品版本为 1.4.0

deploy/docker-compose.yml

@@ -60,7 +60,7 @@ services:
       context: ..
       dockerfile: deploy/Dockerfile
       target: runtime
-    image: classhelper-server:${APP_VERSION:-1.3.3}
+    image: classhelper-server:${APP_VERSION:-1.4.0}
     restart: unless-stopped
     environment:
       NODE_ENV: production
@@ -83,6 +83,8 @@ services:
       DEFAULT_TEACHER_PASSWORD: ${DEFAULT_TEACHER_PASSWORD:-123456}
     ports:
       - '${SERVER_PORT:-4000}:4000'
+    volumes:
+      - server-data:/app/data
     depends_on:
       db: { condition: service_healthy }
       migrate: { condition: service_completed_successfully }
@@ -93,4 +95,5 @@ networks:
     driver: bridge
 
 volumes:
+  server-data:
   db-data: