Refactor login page (#31530)

As requested in
https://github.com/go-gitea/gitea/pull/31504#issuecomment-2196196646.
This PR refactor the login page:

![Screenshot from 2024-07-04
19-23-10](https://github.com/go-gitea/gitea/assets/6918444/c45700f4-6747-473c-bdee-2156718a7953)

![Screenshot from 2024-07-04
19-23-21](https://github.com/go-gitea/gitea/assets/6918444/b1bf71cf-85f9-4517-a409-cc6d72e6af8f)

![Screenshot from 2024-06-30
09-35-20](https://github.com/go-gitea/gitea/assets/6918444/728cc37e-0cca-4883-afec-a43663d2c666)


# Changes
- [x] use separate box for passkey login and go to registration
- [x] move forgot passoword next to password label
- [x] fix password required label `*` and padding 
- [x] remove tabs from login page

---------

Co-authored-by: silverwind <me@silverwind.io>

templates/user/auth/signup_inner.tmpl

@@ -1,4 +1,4 @@
-<div class="ui container column fluid{{if .LinkAccountMode}} icon{{end}}">
+<div class="ui container fluid{{if .LinkAccountMode}} icon{{end}}">
 	<h4 class="ui top attached header center">
 		{{if .LinkAccountMode}}
 			{{ctx.Locale.Tr "auth.oauth_signup_title"}}
@@ -7,7 +7,7 @@
 		{{end}}
 	</h4>
 	<div class="ui attached segment">
-		<form class="ui form tw-max-w-2xl tw-m-auto" action="{{.SignUpLink}}" method="post">
+		<form class="ui form" action="{{.SignUpLink}}" method="post">
 			{{.CsrfTokenHtml}}
 			{{if or (not .LinkAccountMode) (and .LinkAccountMode .LinkAccountModeRegister)}}
 			{{template "base/alert" .}}
@@ -38,7 +38,7 @@
 				{{template "user/auth/captcha" .}}
 
 				<div class="inline field">
-					<button class="ui primary button">
+					<button class="ui primary button tw-w-full">
 						{{if .LinkAccountMode}}
 							{{ctx.Locale.Tr "auth.oauth_signup_submit"}}
 						{{else}}
@@ -46,31 +46,20 @@
 						{{end}}
 					</button>
 				</div>
-
-				{{if not .LinkAccountMode}}
-				<div class="inline field">
-					<a href="{{AppSubUrl}}/user/login">{{ctx.Locale.Tr "auth.register_helper_msg"}}</a>
-				</div>
-				{{end}}
 			{{end}}
 
-			{{if .OAuth2Providers}}
-			<div class="divider divider-text">
-				{{ctx.Locale.Tr "sign_in_or"}}
-			</div>
-			<div id="oauth2-login-navigator" class="tw-py-1">
-				<div class="tw-flex tw-flex-col tw-justify-center">
-					<div id="oauth2-login-navigator-inner" class="tw-flex tw-flex-col tw-flex-wrap tw-items-center tw-gap-2">
-						{{range $provider := .OAuth2Providers}}
-							<a class="{{$provider.Name}} ui button tw-flex tw-items-center tw-justify-center tw-py-2 tw-w-full oauth-login-link" href="{{AppSubUrl}}/user/oauth2/{{$provider.DisplayName}}">
-								{{$provider.IconHTML 28}}
-								{{ctx.Locale.Tr "sign_in_with_provider" $provider.DisplayName}}
-							</a>
-						{{end}}
-					</div>
-				</div>
-			</div>
-			{{end}}
+			{{template "user/auth/oauth_container" .}}
 		</form>
 	</div>
 </div>
+
+<div class="ui container fluid">
+	<div class="ui attached segment header top tw-flex tw-flex-col tw-items-center">
+		{{if not .LinkAccountMode}}
+		<div class="field">
+			<span>{{ctx.Locale.Tr "auth.already_have_account"}}</span>
+			<a href="{{AppSubUrl}}/user/login">{{ctx.Locale.Tr "auth.sign_in_now"}}</a>
+		</div>
+		{{end}}
+	</div>
+</div>