Fix: Editing the agent greeting causes the greeting to be continuously added to the message list. #12635 (#12636)

### What problem does this PR solve?

Fix: Editing the agent greeting causes the greeting to be continuously
added to the message list. #12635
### Type of change

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

web/src/components/svg-icon.tsx

@@ -65,6 +65,27 @@ const SvgIcon = memo(
   },
 );
 
+SvgIcon.displayName = 'SvgIcon';
+
+const themeIcons = [
+  LLMFactory.FishAudio,
+  LLMFactory.TogetherAI,
+  LLMFactory.Meituan,
+  LLMFactory.Longcat,
+  LLMFactory.MinerU,
+];
+
+const svgIcons = [
+  LLMFactory.LocalAI,
+  // LLMFactory.VolcEngine,
+  // LLMFactory.MiniMax,
+  LLMFactory.Gemini,
+  LLMFactory.StepFun,
+  LLMFactory.MinerU,
+  LLMFactory.PaddleOCR,
+  // LLMFactory.DeerAPI,
+];
+
 export const LlmIcon = ({
   name,
   height = 48,
@@ -79,14 +100,7 @@ export const LlmIcon = ({
   imgClass?: string;
 }) => {
   const isDark = useIsDarkTheme();
-  const themeIcons = [
-    LLMFactory.FishAudio,
-    LLMFactory.TogetherAI,
-    LLMFactory.Meituan,
-    LLMFactory.Longcat,
-    LLMFactory.MinerU,
-  ];
-  let icon = useMemo(() => {
+  const icon = useMemo(() => {
     const icontemp = IconMap[name as keyof typeof IconMap];
     if (themeIcons.includes(name as LLMFactory)) {
       if (isDark) {
@@ -98,16 +112,6 @@ export const LlmIcon = ({
     return icontemp;
   }, [name, isDark]);
 
-  const svgIcons = [
-    LLMFactory.LocalAI,
-    // LLMFactory.VolcEngine,
-    // LLMFactory.MiniMax,
-    LLMFactory.Gemini,
-    LLMFactory.StepFun,
-    LLMFactory.MinerU,
-    LLMFactory.PaddleOCR,
-    // LLMFactory.DeerAPI,
-  ];
   if (svgIcons.includes(name as LLMFactory)) {
     return (
       <SvgIcon

web/src/hooks/logic-hooks.ts

@@ -536,6 +536,30 @@ export const useSelectDerivedMessages = () => {
     });
   }, []);
 
+  const addPrologue = useCallback((prologue: string) => {
+    setDerivedMessages((pre) => {
+      if (pre.length > 0) {
+        return [
+          {
+            ...pre[0],
+            content: prologue,
+          },
+          ...pre.slice(1),
+        ];
+      }
+
+      return [
+        {
+          role: MessageType.Assistant,
+          content: prologue,
+          id: buildMessageUuid({
+            role: MessageType.Assistant,
+          }),
+        },
+      ];
+    });
+  }, []);
+
   const removeLatestMessage = useCallback(() => {
     setDerivedMessages((pre) => {
       const nextMessages = pre?.slice(0, -2) ?? [];
@@ -607,6 +631,7 @@ export const useSelectDerivedMessages = () => {
     removeAllMessages,
     scrollToBottom,
     removeAllMessagesExceptFirst,
+    addPrologue,
   };
 };
 

web/src/pages/agent/chat/use-send-agent-message.ts

@@ -243,6 +243,7 @@ export const useSendAgentMessage = ({
     removeAllMessages,
     removeAllMessagesExceptFirst,
     scrollToBottom,
+    addPrologue,
   } = useSelectDerivedMessages();
   const { addEventList: addEventListFun } = useContext(AgentChatLogContext);
   const {
@@ -417,12 +418,11 @@ export const useSendAgentMessage = ({
       return;
     }
     if (prologue) {
-      addNewestOneAnswer({
-        answer: prologue,
-      });
+      addPrologue(prologue);
     }
   }, [
     addNewestOneAnswer,
+    addPrologue,
     agentId,
     isTaskMode,
     prologue,