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-modules/easyflow-module-agent/pom.xml

@@ -49,6 +49,14 @@
             <groupId>tech.easyflow</groupId>
             <artifactId>easyflow-common-satoken</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.dromara.x-file-storage</groupId>
+            <artifactId>x-file-storage-spring</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.minio</groupId>
+            <artifactId>minio</artifactId>
+        </dependency>
         <dependency>
             <groupId>com.mybatis-flex</groupId>
             <artifactId>mybatis-flex-spring-boot3-starter</artifactId>