chore: update live chat and work server changes

src/app/main/chatV2/hooks/useConversationComposerController.ts

@@ -2,6 +2,19 @@ import { useCallback } from 'react';
 import { chatGateway } from '../data/chatGateway';
 import type { ChatComposerAttachment, ChatConversationRequest, ChatMessage } from '../../mainChatPanel/types';
 
+export type ComposerFilePickResult = {
+  items: {
+    key: string;
+    fileName: string;
+    status: 'uploaded' | 'failed';
+    reason?: string;
+  }[];
+};
+
+function buildComposerFilePickKey(file: File) {
+  return `${file.name}:${file.size}:${file.type}:${file.lastModified}`;
+}
+
 type PendingChatRequest = {
   sessionId: string;
   requestId: string;
@@ -107,9 +120,9 @@ export function useConversationComposerController({
   scrollViewportToBottom,
 }: UseConversationComposerControllerOptions) {
   const handleComposerFilesPicked = useCallback(
-    async (files: File[]) => {
+    async (files: File[]): Promise<ComposerFilePickResult> => {
       if (files.length === 0 || isComposerAttachmentUploading) {
-        return;
+        return { items: [] };
       }
 
       setIsComposerAttachmentUploading(true);
@@ -117,7 +130,7 @@ export function useConversationComposerController({
         files.map((file) => chatGateway.uploadComposerFile(activeSessionId, file)),
       );
       const uploadedItems: ChatComposerAttachment[] = [];
-      const failedFileNames: string[] = [];
+      const failedItems: Array<{ fileName: string; reason: string }> = [];
 
       uploadResults.forEach((result, index) => {
         if (result.status === 'fulfilled') {
@@ -125,7 +138,12 @@ export function useConversationComposerController({
           return;
         }
 
-        failedFileNames.push(files[index]?.name || `파일 ${index + 1}`);
+        const fileName = files[index]?.name || `파일 ${index + 1}`;
+        const reason =
+          result.reason instanceof Error && result.reason.message.trim()
+            ? result.reason.message.trim()
+            : '업로드 실패';
+        failedItems.push({ fileName, reason });
       });
 
       if (uploadedItems.length > 0) {
@@ -134,14 +152,29 @@ export function useConversationComposerController({
         setShowScrollToBottom(false);
       }
 
-      if (failedFileNames.length > 0) {
+      if (failedItems.length > 0) {
         setMessages((previous) => [
           ...previous.slice(-39),
-          createLocalMessage(`파일 업로드에 실패했습니다: ${failedFileNames.join(', ')}`),
+          createLocalMessage(
+            ['파일 업로드에 실패했습니다:', ...failedItems.map((item) => `- ${item.fileName}: ${item.reason}`)].join('\n'),
+          ),
         ]);
       }
 
       setIsComposerAttachmentUploading(false);
+      return {
+        items: uploadResults.map((result, index) => ({
+          key: buildComposerFilePickKey(files[index] as File),
+          fileName: files[index]?.name || `파일 ${index + 1}`,
+          status: result.status === 'fulfilled' ? 'uploaded' : 'failed',
+          reason:
+            result.status === 'fulfilled'
+              ? undefined
+              : result.reason instanceof Error && result.reason.message.trim()
+                ? result.reason.message.trim()
+                : '업로드 실패',
+        })),
+      };
     },
     [
       activeSessionId,