feat: 完善智能体图片聊天与会话恢复

- 增加私有图片上传、绑定、历史回显与生命周期清理

- 支持输入草稿恢复、图片交互和模型图片能力约束

- 修复旧脏会话幂等删除与前端会话恢复

easyflow-starter/easyflow-starter-all/src/main/resources/application.yml

@@ -156,6 +156,14 @@ easyflow:
       command-topic-prefix: easyflow:agent-runtime-command
       command-result-timeout: 5s
       command-result-ttl: 5m
+    media:
+      platform: minio-agent-media
+      max-image-count: 5
+      max-image-bytes: 10485760
+      max-image-pixels: 40000000
+      upload-ttl: 24h
+      composer-draft-ttl: 24h
+      cleanup-interval: 10m
   login:
     # 放行接口路径
     excludes: /api/v1/auth/**, /static/**, /userCenter/auth/**, /userCenter/public/**
@@ -213,6 +221,13 @@ dromara:
         # minio 对象对外访问链接
         domain: http://127.0.0.1:39000/easyflow/
         base-path: attachment
+      - platform: minio-agent-media
+        enable-storage: true
+        access-key: easyflowadmin
+        secret-key: easyflowadmin123
+        end-point: http://127.0.0.1:39000
+        bucket-name: easyflow-agent-media
+        base-path: agent-chat
 
 # easy-agents 文档解析统一配置
 easy-agents: