Add "Incorrect username or password" message

public/css/login.css

@@ -233,6 +233,11 @@ iframe {
   overflow: hidden;
 }
 
+#login-fail {
+  color: red;
+  display: none;
+}
+
 #bottom-text {
   text-align: left;
   margin: 5px 14px;

public/js/home.js

@@ -789,7 +789,7 @@ function responseCallback(response, includedTerms) {
         return;
     }
     if (response.recent.login_fail) {
-        location.href = '/logout';
+        location.href = "/logout?fail=1";
     }
 
     if (response.classes.length === 0) {

public/js/login.js

@@ -1,3 +1,8 @@
+// Show "incorrect username or password" on failed login
+if ((new URLSearchParams(window.location.search)).get("fail") === "1") {
+  document.querySelector("#login-fail").style.setProperty("display", "unset");
+}
+
 // Remember me - load username from localStorage
 window.addEventListener("load", () => {
   localStorage.removeItem("password");

public/login.html

@@ -57,6 +57,9 @@
                 <span class="txt1" style="color:#595959">
                   Aspen credentials or leave blank to import data
                 </span>
+                <span id="login-fail" class="txt3">
+                  Incorrect username or password.
+                </span>
               </div>
               <!-- Username Input -->
               <div class="wrap-input100">

serve.js

@@ -280,7 +280,10 @@ app.post('/login', async (req, res) => {
 
 app.get('/logout', async (req, res) => {
     req.session.destroy();
-    res.redirect('/login');
+    if (req.query.fail === '1')
+        res.redirect('/login?fail=1');
+    else
+        res.redirect('/login');
 });