feat: 新增4个工具(imgcompress/LamaCleaner/webp2jpg/Overleaf/LaTeX公式编辑器) + 应用广场布局优化

新增工具部署：
- imgcompress (端口18087) - 图片压缩、格式转换、AI抠图
- Lama Cleaner (端口18088) - AI图像擦除/去水印
- webp2jpg-online (端口18089) - 图片格式批量互转
- Overleaf (端口18090) - 在线LaTeX论文编辑器(docker-compose + MongoDB 8.0)
- LaTeX公式编辑器 (端口18091) - 纯前端KaTeX公式编辑

应用广场优化：
- 去掉tab切换，所有分类平铺展示
- CSS Grid自适应布局，一行可排3-4个卡片
- 重新分为4个分类：文档处理、图片处理、创作绘图、科研写作

其他：
- 更新 CLAUDE.md 项目配置文档
- PPTist AI后端优化prompt和流式输出格式

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/overleaf-deploy/docker-compose.yml

@@ -0,0 +1,49 @@
+version: '3'
+services:
+  sharelatex:
+    image: docker.1ms.run/sharelatex/sharelatex:latest
+    container_name: overleaf
+    restart: always
+    depends_on:
+      - mongo
+      - redis
+    ports:
+      - 18090:80
+    volumes:
+      - overleaf-data:/var/lib/overleaf
+    environment:
+      OVERLEAF_APP_NAME: "LaTeX 论文编辑器"
+      OVERLEAF_MONGO_URL: "mongodb://mongo/overleaf?replicaSet=overleaf"
+      OVERLEAF_REDIS_HOST: "redis"
+      REDIS_HOST: "redis"
+      ENABLED_LINKED_FILE_TYPES: "project_file,project_output_file"
+      ENABLE_CONVERSIONS: "true"
+      EMAIL_CONFIRMATION_DISABLED: "true"
+      OVERLEAF_SITE_URL: "http://localhost:18090"
+      OVERLEAF_LEFT_OPEN_REGISTRATION: "true"
+
+  mongo:
+    image: docker.1ms.run/mongo:8.0
+    container_name: overleaf-mongo
+    restart: always
+    command: --replSet overleaf
+    volumes:
+      - overleaf-mongo:/data/db
+    healthcheck:
+      test: >
+        mongosh --eval "try { rs.status().ok } catch(e) { rs.initiate({_id:'overleaf',members:[{_id:0,host:'mongo:27017'}]}).ok }" --quiet
+      interval: 10s
+      timeout: 10s
+      retries: 5
+
+  redis:
+    image: docker.1ms.run/redis:7-alpine
+    container_name: overleaf-redis
+    restart: always
+    volumes:
+      - overleaf-redis:/data
+
+volumes:
+  overleaf-data:
+  overleaf-mongo:
+  overleaf-redis: