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-ai/src/main/java/tech/easyflow/ai/entity/Model.java

@@ -67,6 +67,7 @@ public class Model extends ModelBase {
                 }
                 ollamaChatConfig.setModel(checkAndGetModelName());
                 ollamaChatConfig.setProvider(getModelProvider().getProviderName());
+                ollamaChatConfig.setSupportImageBase64Only(getSupportImageB64Only());
                 return new OllamaChatModel(ollamaChatConfig);
             case "deepseek":
                 DeepseekConfig deepseekConfig = new DeepseekConfig();
@@ -78,6 +79,7 @@ public class Model extends ModelBase {
                 deepseekConfig.setSupportThinking(Boolean.TRUE);
                 deepseekConfig.setThinkingProtocol("deepseek");
                 deepseekConfig.setNeedReasoningContentForToolMessage(Boolean.TRUE);
+                deepseekConfig.setSupportImageBase64Only(getSupportImageB64Only());
                 if (getSupportToolMessage() != null) {
                     deepseekConfig.setSupportToolMessage(getSupportToolMessage());
                 }
@@ -89,6 +91,7 @@ public class Model extends ModelBase {
                 openAIChatConfig.setApiKey(checkAndGetApiKey());
                 openAIChatConfig.setModel(checkAndGetModelName());
                 openAIChatConfig.setRequestPath(checkAndGetRequestPath());
+                openAIChatConfig.setSupportImageBase64Only(getSupportImageB64Only());
                 if (getSupportToolMessage() != null) {
                     openAIChatConfig.setSupportToolMessage(getSupportToolMessage());
                 }