Fix/branding broken (#20375)

Co-authored-by: zxhlyh <jasonapring2015@outlook.com>

web/app/components/base/chat/chat-with-history/sidebar/index.tsx

@@ -148,10 +148,12 @@ const Sidebar = ({ isPanel }: Props) => {
               'flex shrink-0 items-center gap-1.5 px-1',
             )}>
               <div className='system-2xs-medium-uppercase text-text-tertiary'>{t('share.chat.poweredBy')}</div>
-              {systemFeatures.branding.enabled ? (
-                <img src={systemFeatures.branding.login_page_logo} alt='logo' className='block h-5 w-auto' />
-              ) : (
-                <DifyLogo size='small' />)
+              {
+                systemFeatures.branding.enabled && systemFeatures.branding.workspace_logo
+                  ? <img src={systemFeatures.branding.workspace_logo} alt='logo' className='block h-5 w-auto' />
+                  : appData?.custom_config?.replace_webapp_logo
+                    ? <img src={`${appData?.custom_config?.replace_webapp_logo}`} alt='logo' className='block h-5 w-auto' />
+                    : <DifyLogo size='small' />
               }
             </div>
           )}