1. fix two_factor and redirect scratch page cannot back to the passcode page(has no back button)

2. fix scratch logged in , redirect to the 404 page

options/locale/locale_de-DE.ini

@@ -30,6 +30,7 @@ captcha=CAPTCHA
 twofa=Zwei-Faktor-Authentifizierung
 twofa_scratch=Zwei-Faktor-Einmalpasswort
 passcode=PIN
+use_passcode=PIN verwenden
 
 u2f_insert_key=Hardware-Sicherheitsschlüssel einstecken
 u2f_sign_in=Drücke den Knopf auf deinem Sicherheitsschlüssel. Wenn deiner keinen Knopf hat, stecke ihn erneut ein.

options/locale/locale_en-US.ini

@@ -30,6 +30,7 @@ captcha = CAPTCHA
 twofa = Two-Factor Authentication
 twofa_scratch = Two-Factor Scratch Code
 passcode = Passcode
+use_passcode = Use Passcode
 
 u2f_insert_key = Insert your security key
 u2f_sign_in = Press the button on your security key. If you can't find a button, re-insert it.

options/locale/locale_zh-CN.ini

@@ -30,6 +30,7 @@ captcha=验证码
 twofa=两步验证
 twofa_scratch=两步验证口令
 passcode=验证码
+use_passcode=使用验证码
 
 u2f_insert_key=插入安全密钥
 u2f_sign_in=按下安全密钥上的按钮。如果找不到按钮, 请重新插入。

options/locale/locale_zh-HK.ini

@@ -16,6 +16,7 @@ notifications=訊息
 
 password=密碼
 passcode=驗證碼
+use_passcode=使用驗證碼
 
 
 repository=儲存庫

options/locale/locale_zh-TW.ini

@@ -18,6 +18,7 @@ signed_in_as=已登入用戶
 username=用戶名稱
 password=密碼
 passcode=驗證碼
+use_passcode=使用驗證碼
 
 
 repository=儲存庫

templates/user/auth/twofa_scratch.tmpl

@@ -17,6 +17,7 @@
 					<div class="inline field">
 						<label></label>
 						<button class="ui green button">{{.i18n.Tr "auth.verify"}}</button>
+						 <a href="{{AppSubUrl}}/user/two_factor">{{.i18n.Tr "use_passcode" | Str2html}}</a>
 					</div>
 				</div>
 			</form>