fix: remove unused Sora references causing TypeScript build failure

- Remove handleImportAccessToken event binding from CreateAccountModal
- Remove unused imports/variables from OAuthAuthorizationFlow (useAppStore,
  parsedAccessToken*, handleImportAccessToken)
- Remove unused oauthPlatform variable from useOpenAIOAuth composable

frontend/src/components/account/CreateAccountModal.vue

@@ -2478,7 +2478,6 @@
         @validate-refresh-token="handleValidateRefreshToken"
         @validate-mobile-refresh-token="handleOpenAIValidateMobileRT"
         @validate-session-token="handleValidateSessionToken"
-        @import-access-token="handleImportAccessToken"
       />
 
     </div>

frontend/src/components/account/OAuthAuthorizationFlow.vue

@@ -542,7 +542,6 @@
 import { ref, computed, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { useClipboard } from '@/composables/useClipboard'
-import { useAppStore } from '@/stores'
 import Icon from '@/components/icons/Icon.vue'
 import type { AddMethod, AuthInputMethod } from '@/composables/useAccountOAuth'
 import type { AccountPlatform } from '@/types'
@@ -662,17 +661,6 @@ const parsedSessionTokenCount = computed(() => 0)
 
 const parsedSessionTokensText = computed(() => '')
 
-const parsedAccessTokenFromSessionInputCount = computed(() => 0)
-
-const parsedAccessTokensText = computed(() => '')
-
-const parsedAccessTokenCount = computed(() => {
-  return accessTokenInput.value
-    .split('\n')
-    .map((at) => at.trim())
-    .filter((at) => at).length
-})
-
 // Watchers
 watch(inputMethod, (newVal) => {
   emit('update:inputMethod', newVal)
@@ -750,12 +738,6 @@ const handleValidateSessionToken = () => {
   }
 }
 
-const handleImportAccessToken = () => {
-  if (accessTokenInput.value.trim()) {
-    emit('import-access-token', accessTokenInput.value.trim())
-  }
-}
-
 // Expose methods and state
 defineExpose({
   authCode: authCodeInput,

frontend/src/composables/useOpenAIOAuth.ts

@@ -30,7 +30,6 @@ interface UseOpenAIOAuthOptions {
 
 export function useOpenAIOAuth(options?: UseOpenAIOAuthOptions) {
   const appStore = useAppStore()
-  const oauthPlatform = options?.platform ?? 'openai'
   const endpointPrefix = '/admin/openai'
 
   // State