fix: localize English UI strings

frontend/src/views/auth/DingTalkCallbackView.vue

@@ -295,7 +295,7 @@ const totpTempToken = ref('')
 const totpCode = ref('')
 const totpError = ref('')
 const totpUserEmailMasked = ref('')
-const providerName = '钉钉'
+const providerName = t('auth.dingtalkProviderName')
 
 const needsCreateAccount = computed(() => pendingAccountAction.value === 'create_account')
 const needsChooser = computed(() => pendingAccountAction.value === 'choose_account_action')

frontend/src/views/auth/LoginView.vue

@@ -397,7 +397,7 @@ function rejectLoginAgreement(): void {
   localStorage.removeItem(LOGIN_AGREEMENT_STORAGE_KEY)
   agreementAccepted.value = false
   showAgreementModal.value = false
-  appStore.showWarning('未同意最新条款前，无法输入账号密码或使用快捷登录。')
+  appStore.showWarning(t('legal.loginAgreementPrompt.loginRejectedWarning'))
 }
 
 // ==================== Turnstile Handlers ====================
@@ -428,7 +428,7 @@ function validateForm(): boolean {
   let isValid = true
 
   if (agreementGateActive.value) {
-    appStore.showWarning('请先阅读并同意最新条款后再登录。')
+    appStore.showWarning(t('legal.loginAgreementPrompt.loginRequiredWarning'))
     if (loginAgreementMode.value !== 'checkbox') {
       showAgreementModal.value = true
     }

frontend/src/views/auth/RegisterView.vue

@@ -567,7 +567,7 @@ function rejectLoginAgreement(): void {
   localStorage.removeItem(LOGIN_AGREEMENT_STORAGE_KEY)
   agreementAccepted.value = false
   showAgreementModal.value = false
-  appStore.showWarning('未同意最新条款前，无法注册或使用快捷登录。')
+  appStore.showWarning(t('legal.loginAgreementPrompt.registerRejectedWarning'))
 }
 
 // ==================== Promo Code Validation ====================
@@ -757,7 +757,7 @@ function validateForm(): boolean {
   let isValid = true
 
   if (agreementGateActive.value) {
-    appStore.showWarning('请先阅读并同意最新条款后再注册。')
+    appStore.showWarning(t('legal.loginAgreementPrompt.registerRequiredWarning'))
     if (loginAgreementMode.value !== 'checkbox') {
       showAgreementModal.value = true
     }