chore: hide "or" when password auth disabled (#4699)

This makes the UI cleaner, instead only showing the "Sign in with ..." buttons.

web/src/pages/SignIn.tsx

@@ -65,9 +65,9 @@ const SignIn = () => {
         </div>
         {!workspaceGeneralSetting.disallowPasswordAuth ? (
           <PasswordSignInForm />
-        ) : (
+        ) : (identityProviderList.length == 0 && (
           <p className="w-full text-2xl mt-2 dark:text-gray-500">Password auth is not allowed.</p>
-        )}
+        ))}
         {!workspaceGeneralSetting.disallowUserRegistration && !workspaceGeneralSetting.disallowPasswordAuth && (
           <p className="w-full mt-4 text-sm">
             <span className="dark:text-gray-500">{t("auth.sign-up-tip")}</span>
@@ -78,7 +78,7 @@ const SignIn = () => {
         )}
         {identityProviderList.length > 0 && (
           <>
-            <Divider className="!my-4">{t("common.or")}</Divider>
+            {!workspaceGeneralSetting.disallowPasswordAuth && <Divider className="!my-4">{t("common.or")}</Divider>}
             <div className="w-full flex flex-col space-y-2">
               {identityProviderList.map((identityProvider) => (
                 <Button