fix: skip canvas SSE fetch in chat shared page to eliminate spurious 103 error (#14190)

## What does this PR do?

Fixes the `hint : 103 Only owner of canvas authorized for this
operation` error that appears when opening a **Chat** shared link
(`/chats/share?shared_id=...&from=chat`).

## Root Cause

The Chat shared page (`web/src/pages/next-chats/share/index.tsx`)
unconditionally calls `useFetchFlowSSE()`, which requests
`/api/canvas/getsse/{sharedId}`. This is an Agent Canvas endpoint that
validates canvas ownership. When sharing a **Chat** dialog (not an
Agent):

1. `sharedId` is a `dialog_id`, not a `canvas_id`
2. The API token's `tenant_id` doesn't match any canvas owner
3. The backend returns `code: 103, message: "Only owner of canvas
authorized for this operation."`
4. The global error interceptor in `request.ts` displays it as a
notification: `hint : 103 Only owner of canvas authorized for this
operation.`

## Changes

- **`web/src/hooks/use-agent-request.ts`**: Added an `enabled` parameter
to `useFetchFlowSSE` so callers can conditionally skip the query.
- **`web/src/pages/next-chats/share/index.tsx`**: Only enable
`useFetchFlowSSE` when `from === SharedFrom.Agent`. For Chat shares, the
hook is disabled, avoiding the unnecessary canvas API call entirely.

## Related Issue

Closes #14115

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

---------

Signed-off-by: noob <yixiao121314@outlook.com>

web/src/hooks/use-agent-request.ts

@@ -794,7 +794,7 @@ export function useCancelConversation() {
   return { data, loading, cancelConversation: mutateAsync };
 }
 
-export const useFetchSharedAgent = (): {
+export const useFetchFlowSSE = (): {
   data: IFlow;
   loading: boolean;
   refetch: () => void;
@@ -808,6 +808,7 @@ export const useFetchSharedAgent = (): {
   } = useQuery({
     queryKey: [AgentApiAction.FetchSharedAgent, sharedId],
     initialData: {} as IFlow,
+    enabled: !!sharedId,
     refetchOnReconnect: false,
     refetchOnMount: false,
     refetchOnWindowFocus: false,

web/src/locales/zh.ts

@@ -1265,7 +1265,8 @@ General：实体和关系提取提示来自 GitHub - microsoft/graphrag：基于
       includeHeadingContentTip:
         '启用后，标题下的直接内容将作为一个独立的块保留。子块仅保留标题路径。',
       rootAsHeading: '将首个切片设为 H0 标题',
-      rootAsHeadingTip: '将首个切片设为全局标题，以确保整个文档层级结构中拥有一致的上下文信息。该功能尤其适用于首段包含关键信息的简历。',
+      rootAsHeadingTip:
+        '将首个切片设为全局标题，以确保整个文档层级结构中拥有一致的上下文信息。该功能尤其适用于首段包含关键信息的简历。',
       hierarchyTip: `构建标题树并生成独立的块，每个块携带其完整的祖先标题路径（例如 第1部分 › 第3章 › 第2节 + 正文）。\n
 适用场景：具有独立的、结构性重要章节的文档——如法律条款、法规、合同和技术规范——其中每个块即使没有上下文也能通过其结构位置来识别。`,
       groupTip: `在选定的标题级别将文档扁平分割，并自动合并相邻的小节以保持内容连续性。不注入父标题路径。\n

web/src/pages/next-chats/share/index.tsx

@@ -4,8 +4,7 @@ import MessageItem from '@/components/message-item';
 import PdfSheet from '@/components/pdf-drawer';
 import { useClickDrawer } from '@/components/pdf-drawer/hooks';
 import { useSyncThemeFromParams } from '@/components/theme-provider';
-import { MessageType, SharedFrom } from '@/constants/chat';
-import { useFetchSharedAgent } from '@/hooks/use-agent-request';
+import { MessageType } from '@/constants/chat';
 import { useFetchExternalChatInfo } from '@/hooks/use-chat-request';
 import i18n, { changeLanguageAsync } from '@/locales/config';
 import { buildMessageUuidWithRole } from '@/utils/chat';
@@ -20,7 +19,6 @@ import { buildMessageItemReference } from '../utils';
 const ChatContainer = () => {
   const {
     sharedId: conversationId,
-    from,
     locale,
     theme,
     visibleAvatar,
@@ -44,15 +42,13 @@ const ChatContainer = () => {
   const sendDisabled = useSendButtonDisabled(value);
   const { data: chatInfo } = useFetchExternalChatInfo();
 
-  const { data: flowData } = useFetchSharedAgent();
   React.useEffect(() => {
     if (locale && i18n.language !== locale) {
       changeLanguageAsync(locale);
     }
   }, [locale, visibleAvatar]);
 
-  const avatarDialogSrc =
-    from === SharedFrom.Agent ? flowData?.avatar : chatInfo.avatar;
+  const avatarDialogSrc = chatInfo.avatar;
 
   if (!conversationId) {
     return <div>empty</div>;

web/src/pages/user-setting/data-source/data-source-detail-page/index.tsx

@@ -144,7 +144,7 @@ const SourceDetailPage = () => {
     ];
   }, [detail, runSchedule]);
 
-  const { addLoading, handleAddOk } = useAddDataSource({isEdit:true});
+  const { addLoading, handleAddOk } = useAddDataSource({ isEdit: true });
 
   const onSubmit = useCallback(() => {
     formRef?.current?.submit();

web/src/pages/user-setting/data-source/hooks.ts

@@ -3,7 +3,8 @@ import { useSetModalState } from '@/hooks/common-hooks';
 import { useGetPaginationWithRouter } from '@/hooks/logic-hooks';
 import dataSourceService, {
   dataSourceRebuild,
-  dataSourceResume, dataSourceUpdate,
+  dataSourceResume,
+  dataSourceUpdate,
   deleteDataSource,
   featchDataSourceDetail,
   getDataSourceLogs,
@@ -68,7 +69,7 @@ export const useListDataSource = () => {
   return { list, categorizedList: updatedDataSourceTemplates, isFetching };
 };
 
-export const useAddDataSource = ({isEdit=false}:{isEdit?:boolean} ) => {
+export const useAddDataSource = ({ isEdit = false }: { isEdit?: boolean }) => {
   const [addSource, setAddSource] = useState<IDataSorceInfo | undefined>(
     undefined,
   );