Improve "generate new access token" form (#33730)

Fix: https://github.com/go-gitea/gitea/issues/33519

As discussed in [PR
#33614](https://github.com/go-gitea/gitea/pull/33614), the
ScopedAccessTokenSelector Vue component is not particularly useful.

This PR removes the component and reverts to using HTML templates. It
also introduces some (hopefully) useful refactoring.

The Vue component was causing the UX bug reported in the linked issue.
Required form fields are now properly working, as expected (see
screenshot).

![Screenshot from 2025-02-25
22-00-28](https://github.com/user-attachments/assets/41167854-0718-48b0-a3ee-75ca3a7b8b20)

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

services/forms/user_form.go

@@ -7,9 +7,7 @@ package forms
 import (
 	"mime/multipart"
 	"net/http"
-	"strings"
 
-	auth_model "code.gitea.io/gitea/models/auth"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/modules/web/middleware"
@@ -347,8 +345,7 @@ func (f *EditVariableForm) Validate(req *http.Request, errs binding.Errors) bind
 
 // NewAccessTokenForm form for creating access token
 type NewAccessTokenForm struct {
-	Name  string `binding:"Required;MaxSize(255)" locale:"settings.token_name"`
-	Scope []string
+	Name string `binding:"Required;MaxSize(255)" locale:"settings.token_name"`
 }
 
 // Validate validates the fields
@@ -357,12 +354,6 @@ func (f *NewAccessTokenForm) Validate(req *http.Request, errs binding.Errors) bi
 	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
 }
 
-func (f *NewAccessTokenForm) GetScope() (auth_model.AccessTokenScope, error) {
-	scope := strings.Join(f.Scope, ",")
-	s, err := auth_model.AccessTokenScope(scope).Normalize()
-	return s, err
-}
-
 // EditOAuth2ApplicationForm form for editing oauth2 applications
 type EditOAuth2ApplicationForm struct {
 	Name                       string `binding:"Required;MaxSize(255)" form:"application_name"`