fix(chat-ui): fix MCPEvent import path and rename truncateFromMessage

- responses_api.tsx now imports MCPEvent directly from chat/types (not via MCPEventsDisplay re-export)
- Remove the now-unnecessary MCPEvent re-export from MCPEventsDisplay.tsx
- Rename truncateAfterMessage → truncateFromMessage: the function removes the target message and all subsequent ones (not just what comes after), so the new name accurately describes the behavior

ui/litellm-dashboard/src/components/chat/ChatPage.tsx

@@ -165,7 +165,7 @@ const ChatPage: React.FC<ChatPageProps> = ({ accessToken, userRole, userId, user
     createConversation,
     appendMessage,
     updateLastAssistantMessage,
-    truncateAfterMessage,
+    truncateFromMessage,
     deleteConversation,
     renameConversation,
   } = useChatHistory(activeConversationId);
@@ -397,10 +397,10 @@ const ChatPage: React.FC<ChatPageProps> = ({ accessToken, userRole, userId, user
       const priorMessages = (idx === -1 ? msgs : msgs.slice(0, idx))
         .filter((m) => m.role === "user" || m.role === "assistant")
         .map((m) => ({ role: m.role as "user" | "assistant", content: m.content }));
-      truncateAfterMessage(activeConversationId, messageId);
+      truncateFromMessage(activeConversationId, messageId);
       handleSend(newContent, priorMessages);
     },
-    [activeConversationId, isStreaming, activeConversation, truncateAfterMessage, handleSend],
+    [activeConversationId, isStreaming, activeConversation, truncateFromMessage, handleSend],
   );
 
   const handleSubmit = useCallback(

ui/litellm-dashboard/src/components/chat/useChatHistory.ts

@@ -52,7 +52,8 @@ export function useChatHistory(activeConversationId: string | null): {
   createConversation: (model: string) => string;
   appendMessage: (conversationId: string, message: Omit<ChatMessage, "id" | "timestamp">) => void;
   updateLastAssistantMessage: (conversationId: string, updates: Partial<Pick<ChatMessage, "content" | "reasoningContent" | "mcpEvents">>) => void;
-  truncateAfterMessage: (conversationId: string, messageId: string) => void;
+  /** Remove the message with `messageId` and all subsequent messages from the conversation. */
+  truncateFromMessage: (conversationId: string, messageId: string) => void;
   deleteConversation: (id: string) => void;
   renameConversation: (id: string, newTitle: string) => void;
   setActiveConversationId: (id: string | null) => void;
@@ -168,7 +169,7 @@ export function useChatHistory(activeConversationId: string | null): {
     [],
   );
 
-  const truncateAfterMessage = useCallback(
+  const truncateFromMessage = useCallback(
     (conversationId: string, messageId: string) => {
       setConversations((prev) => {
         const updated = prev.map((conv) => {
@@ -222,7 +223,7 @@ export function useChatHistory(activeConversationId: string | null): {
     createConversation,
     appendMessage,
     updateLastAssistantMessage,
-    truncateAfterMessage,
+    truncateFromMessage,
     deleteConversation,
     renameConversation,
     setActiveConversationId,

ui/litellm-dashboard/src/components/playground/chat_ui/MCPEventsDisplay.tsx

@@ -2,8 +2,6 @@ import React from "react";
 import { Typography, Collapse } from "antd";
 import type { MCPEvent } from "../../chat/types";
 
-export type { MCPEvent };
-
 const { Text } = Typography;
 const { Panel } = Collapse;
 

ui/litellm-dashboard/src/components/playground/llm_calls/responses_api.tsx

@@ -3,7 +3,7 @@ import { MessageType } from "../chat_ui/types";
 import { TokenUsage } from "../chat_ui/ResponseMetrics";
 import { getProxyBaseUrl } from "@/components/networking";
 import NotificationManager from "@/components/molecules/notifications_manager";
-import { MCPEvent } from "../chat_ui/MCPEventsDisplay";
+import type { MCPEvent } from "../../chat/types";
 import { MCPServer } from "../../mcp_tools/types";
 import {
   CodeInterpreterResult,