fix: 支持模型异常后继续文档对话

- 将本轮文档上下文纳入可持久化的 Agent 用户消息

=- 在异常提示中提供请重试动作并自动发送继续

easyflow-ui-admin/app/src/views/ai/agent-chat/index.vue

@@ -2,6 +2,7 @@
 import type {
   ChatDocumentAttachment,
   ChatImageAttachment,
+  ChatTimelineErrorItem,
   ChatTimelineItem,
   ChatTimelineMessageItem,
   ChatTimelineToolApprovalPayload,
@@ -108,6 +109,7 @@ const loadingKnowledges = ref(false);
 const savingExtraKnowledges = ref(false);
 const sending = ref(false);
 const runtimeRunning = ref(false);
+const retryableErrorRoundId = ref('');
 const approvalLoadingKey = ref('');
 const knowledgeOptions = ref<{ label: string; value: string }[]>([]);
 const knowledgeMap = ref(new Map<string, { id: string; title: string }>());
@@ -463,12 +465,19 @@ function syncRuntimeSnapshot(sessionId = currentSessionId.value) {
     : undefined;
   if (!snapshot) {
     sending.value = false;
+    retryableErrorRoundId.value = '';
     return false;
   }
   currentSessionId.value = snapshot.sessionId;
   selectedAgentId.value = String(snapshot.agentId);
   timelineItems.value = snapshot.items;
   sending.value = snapshot.sending;
+  retryableErrorRoundId.value =
+    snapshot.terminalOutcome === 'failed' &&
+    snapshot.retryContextReady &&
+    !snapshot.sending
+      ? snapshot.roundId
+      : '';
   maybeRefreshCompletedRuntimeSession(snapshot);
   if (snapshot.prompt && !currentSession.value) {
     upsertSessionRecord(
@@ -492,15 +501,20 @@ async function loadConversation(sessionId: string) {
   if (!sessionId) {
     timelineItems.value = [];
     sending.value = false;
+    retryableErrorRoundId.value = '';
     return;
   }
   const runtimeSnapshot = agentChatRuntimeManager.getSnapshot(sessionId);
-  if (runtimeSnapshot?.sending) {
+  if (
+    runtimeSnapshot?.sending ||
+    runtimeSnapshot?.terminalOutcome === 'failed'
+  ) {
     syncRuntimeSnapshot(sessionId);
     await syncSessionRoute(sessionId);
     return;
   }
   loadingConversation.value = true;
+  retryableErrorRoundId.value = '';
   try {
     const detailRes = await getAgentSession(sessionId);
     const res = await getAgentConversation(sessionId);
@@ -660,12 +674,25 @@ function buildCapabilities() {
   ];
 }
 
-async function sendContent(rawContent: string) {
+interface SendContentOptions {
+  includeComposer?: boolean;
+  retryContextReady?: boolean;
+}
+
+async function sendContent(
+  rawContent: string,
+  options: SendContentOptions = {},
+) {
   const content = rawContent.trim();
+  const includeComposer = options.includeComposer !== false;
+  const readyImageCount = includeComposer
+    ? composer.images.readyItems.value.length
+    : 0;
+  const readyDocumentCount = includeComposer
+    ? composer.documents.readyItems.value.length
+    : 0;
   if (
-    (!content &&
-      composer.images.readyItems.value.length === 0 &&
-      composer.documents.readyItems.value.length === 0) ||
+    (!content && readyImageCount === 0 && readyDocumentCount === 0) ||
     !selectedAgentId.value ||
     sending.value
   ) {
@@ -675,44 +702,54 @@ async function sendContent(rawContent: string) {
     ElMessage.warning('当前回复完成后再发送新消息');
     return;
   }
-  if (composer.images.uploading.value) {
+  if (includeComposer && composer.images.uploading.value) {
     ElMessage.warning('图片上传完成后再发送');
     return;
   }
-  if (composer.documents.processing.value) {
+  if (includeComposer && composer.documents.processing.value) {
     ElMessage.warning('文档读取完成后再发送');
     return;
   }
-  const failedImage = composer.images.items.value.find(
-    (item) => item.status === 'error',
-  );
+  const failedImage = includeComposer
+    ? composer.images.items.value.find((item) => item.status === 'error')
+    : undefined;
   if (failedImage) {
     ElMessage.error(failedImage.error || '请处理上传失败的图片');
     return;
   }
-  const failedDocument = composer.documents.items.value.find(
-    (item) => item.status === 'error',
-  );
+  const failedDocument = includeComposer
+    ? composer.documents.items.value.find((item) => item.status === 'error')
+    : undefined;
   if (failedDocument) {
     ElMessage.error(failedDocument.error || '请处理读取失败的文档');
     return;
   }
-  await composer.flush();
+  if (includeComposer) {
+    await composer.flush();
+  }
   sending.value = true;
+  retryableErrorRoundId.value = '';
   try {
     const sessionId = await agentChatRuntimeManager.start({
       agentId: selectedAgentId.value,
       agentName: selectedAgent.value?.name,
       baseItems: timelineItems.value,
       capabilities: buildCapabilities(),
-      documentUploadIds: composer.documents.uploadIds.value,
-      documents: composer.documents.readyItems.value.map((item) => ({
-        ...item,
-      })),
-      imageUploadIds: composer.images.uploadIds.value,
-      images: composer.images.readyItems.value.map((item) => ({ ...item })),
-      onInputAccepted: markComposerInputAccepted,
+      documentUploadIds: includeComposer
+        ? composer.documents.uploadIds.value
+        : undefined,
+      documents: includeComposer
+        ? composer.documents.readyItems.value.map((item) => ({ ...item }))
+        : undefined,
+      imageUploadIds: includeComposer
+        ? composer.images.uploadIds.value
+        : undefined,
+      images: includeComposer
+        ? composer.images.readyItems.value.map((item) => ({ ...item }))
+        : undefined,
+      onInputAccepted: includeComposer ? markComposerInputAccepted : undefined,
       prompt: content,
+      retryContextReady: Boolean(options.retryContextReady),
       sessionId: composer.sessionId.value,
     });
     await bindCreatedSession(sessionId, content);
@@ -725,6 +762,24 @@ async function sendContent(rawContent: string) {
   }
 }
 
+function modelErrorAction(item: ChatTimelineErrorItem) {
+  return item.roundId === retryableErrorRoundId.value ? '请重试' : undefined;
+}
+
+async function handleModelErrorRetry(item: ChatTimelineErrorItem) {
+  if (
+    item.roundId !== retryableErrorRoundId.value ||
+    sending.value ||
+    runtimeRunning.value
+  ) {
+    return;
+  }
+  await sendContent('继续', {
+    includeComposer: false,
+    retryContextReady: true,
+  });
+}
+
 async function handleSend() {
   await sendContent(promptText.value);
 }
@@ -1266,12 +1321,15 @@ onBeforeUnmount(() => {
           :artifact-loader="loadCurrentAgentArtifact"
           :items="timelineItems"
           :document-loader="loadAgentChatDocument"
+          :error-action="modelErrorAction"
+          :error-action-disabled="sending || runtimeRunning"
           :image-loader="loadAgentChatImage"
           empty-text="选择智能体后开始对话"
           :approval-loading="Boolean(approvalLoadingKey)"
           :copy-action="handleCopyMessage"
           :copyable="canCopyMessage"
           @approve="handleApprove"
+          @error-action="handleModelErrorRetry"
           @reject="handleReject"
           @select-next-variant="() => undefined"
           @select-previous-variant="() => undefined"