Fix: Excel upload logic, field mapping for servers, and date format synchronization

src/core/schema.ts

@@ -22,6 +22,7 @@ export const ASSET_SCHEMA = {
   VENDOR:         { key: '납품업체',      db: 'vendor',          ui: '납품업체' },
   DOC_NAME:       { key: '품의서명',      db: 'doc_name',        ui: '품의서' },
   REMARKS:        { key: '비고',         db: 'remarks',         ui: '비고' },
+  DETAIL_PURPOSE: { key: '상세용도',      db: 'detail_purpose',  ui: '용도' },
 
   // ─── 하드웨어 상세 (Hardware) ───
   USER:           { key: '사용자',       db: 'purpose',         ui: '사용자' },
@@ -35,6 +36,8 @@ export const ASSET_SCHEMA = {
   IP_ADDR:        { key: 'IP주소',       db: 'ip_address',      ui: 'IP 주소 1' },
   IP_ADDR2:       { key: 'IP2',          db: 'ip2',             ui: 'IP 주소 2' },
   MAC_ADDR:       { key: 'MACaddress',   db: 'mac_address',     ui: 'MAC 주소' },
+  GPU:            { key: 'GPU',          db: 'gpu',             ui: 'GPU' },
+  STORAGE3:       { key: 'SSD3',         db: 'storage3',        ui: 'Storage 3' },
   STATUS:         { key: '현재상태',      db: 'status',          ui: '현재상태' },
   STORE_LOC:      { key: '보관위치',      db: 'storage_location',ui: '보관위치' },