feat: 支持 Agent 运行刷新恢复

- 解耦 Runtime 与浏览器 SSE 订阅并增加 Redis 游标日志

- 支持正式聊天与草稿试运行刷新重连和权威终态恢复

- 完善显式取消、owner 丢失、容量限制与故障测试

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

@@ -711,10 +711,7 @@ async function sendContent(rawContent: string) {
       })),
       imageUploadIds: composer.images.uploadIds.value,
       images: composer.images.readyItems.value.map((item) => ({ ...item })),
-      onInputAccepted: () =>
-        composer.markAccepted().catch(() => {
-          ElMessage.warning('消息已发送，草稿将在过期后自动清理');
-        }),
+      onInputAccepted: markComposerInputAccepted,
       prompt: content,
       sessionId: composer.sessionId.value,
     });
@@ -752,6 +749,12 @@ async function activateComposer(agentId: string, sessionId?: string) {
   }
 }
 
+function markComposerInputAccepted() {
+  return composer.markAccepted().catch(() => {
+    ElMessage.warning('消息已发送，草稿将在过期后自动清理');
+  });
+}
+
 function chooseAttachmentFiles() {
   attachmentFileInputRef.value?.click();
 }
@@ -961,7 +964,7 @@ function handlePromptKeydown(event: Event | KeyboardEvent) {
   }
 }
 
-function handleStop() {
+async function handleStop() {
   if (!canStopRuntime.value) {
     return;
   }
@@ -970,7 +973,12 @@ function handleStop() {
     currentSessionId.value
       ? currentSessionId.value
       : agentChatRuntimeManager.getLatestSnapshot()?.sessionId;
-  agentChatRuntimeManager.stop(runningSessionId);
+  try {
+    await agentChatRuntimeManager.stop(runningSessionId);
+  } catch (error) {
+    ElMessage.error(error instanceof Error ? error.message : '停止失败');
+    return;
+  }
   if (runningSessionId === currentSessionId.value) {
     syncRuntimeSnapshot(currentSessionId.value);
   } else {
@@ -1094,6 +1102,13 @@ async function bootstrap() {
   await Promise.all([loadAgents(), loadSessions(), loadKnowledges()]);
   const routeSessionId = String(route.query.sessionId || '');
   if (routeSessionId) {
+    const runtimeSnapshot = agentChatRuntimeManager.getSnapshot(routeSessionId);
+    if (runtimeSnapshot?.sending) {
+      syncRuntimeSnapshot(routeSessionId);
+      await activateComposer(selectedAgentId.value, routeSessionId);
+      agentChatRuntimeManager.resume(routeSessionId, markComposerInputAccepted);
+      return;
+    }
     await loadConversation(routeSessionId);
     return;
   }
@@ -1101,6 +1116,10 @@ async function bootstrap() {
   if (latestSnapshot?.items.length) {
     syncRuntimeSnapshot(latestSnapshot.sessionId);
     await activateComposer(selectedAgentId.value, latestSnapshot.sessionId);
+    agentChatRuntimeManager.resume(
+      latestSnapshot.sessionId,
+      markComposerInputAccepted,
+    );
     return;
   }
   await activateComposer(selectedAgentId.value);