试卷题目配图(几何体):编辑器上传区+孩子端渲染+文件名校验+public挂卷持久化

uploadPaperFigure 存 public/exam/<卷>/<uuid>.ext;编辑器预览/移除;
quiz-block 渲染 q.figure;compose 挂 exam-figures 卷防重建丢失。

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

compose.yaml

@@ -5,6 +5,8 @@ services:
     container_name: superjump
     restart: unless-stopped
     env_file: .env
+    volumes:
+      - exam-figures:/app/public/exam
     networks: [proxy, data]
     labels:
       - traefik.enable=true
@@ -21,3 +23,7 @@ networks:
   data:
     name: data
     external: true
+
+# 试卷配图持久化:容器内 public/exam 写卷挂载,重建不丢
+volumes:
+  exam-figures: