Set the language in the title url

- Do not force the language in the url when sign out to use the cookie or Accept-Language settings

backend/src/services/user.rs

@@ -368,8 +368,7 @@ pub async fn sign_in_post(
             Ok((
                 jar.add(cookie),
                 Redirect::to(&format!(
-                    "/{}/?{}={}&{}={}",
-                    context.tr.current_lang_code(),
+                    "/?{}={}&{}={}",
                     common::consts::GET_PARAMETER_USER_MESSAGE,
                     Sentence::SignInSuccess as i64,
                     common::consts::GET_PARAMETER_USER_MESSAGE_LEVEL,
@@ -395,10 +394,7 @@ pub async fn sign_out(
         jar = jar.remove(consts::COOKIE_AUTH_TOKEN_NAME);
         connection.sign_out(&token).await?;
     }
-    Ok((
-        jar,
-        Redirect::to(&format!("/{}/", context.tr.current_lang_code())),
-    ))
+    Ok((jar, Redirect::to("/")))
 }
 
 /// RESET PASSWORD ///

backend/tests/http.rs

@@ -219,8 +219,7 @@ async fn sign_in() -> Result<(), Box<dyn Error>> {
     response.assert_status_see_other(); // Redirection after successful sign in.
     response.assert_text("");
     // English is the default language.
-    response.assert_header("location", "/en/?user_message=16&user_message_icon=0");
-    dbg!(&response);
+    response.assert_header("location", "/?user_message=16&user_message_icon=0");
 
     Ok(())
 }