backport v1.10 - Always show Password field on link account sign in page (#9150)

Author: blueworrybear

routers/user/auth.go

@@ -786,6 +786,7 @@ func LinkAccountPostSignIn(ctx *context.Context, signInForm auth.SignInForm) {
 	u, err := models.UserSignIn(signInForm.UserName, signInForm.Password)
 	if err != nil {
 		if models.IsErrUserNotExist(err) {
+			ctx.Data["user_exists"] = true
 			ctx.RenderWithErr(ctx.Tr("form.username_password_incorrect"), tplLinkAccount, &signInForm)
 		} else {
 			ctx.ServerError("UserLinkAccount", err)

templates/user/auth/signin_inner.tmpl

@@ -15,7 +15,7 @@
 				<label for="user_name">{{.i18n.Tr "home.uname_holder"}}</label>
 				<input id="user_name" name="user_name" value="{{.user_name}}" autofocus required>
 			</div>
-			{{if not .DisablePassword}}
+			{{if or (not .DisablePassword) .LinkAccountMode}}
 			<div class="required inline field {{if and (.Err_Password) (or (not .LinkAccountMode) (and .LinkAccountMode .LinkAccountModeSignIn))}}error{{end}}">
 				<label for="password">{{.i18n.Tr "password"}}</label>
 				<input id="password" name="password" type="password" value="{{.password}}" autocomplete="off" required>