fix(api): allow bots with pending password changes (#39551)

Allow bot accounts to use the API when a legacy password-change flag is
set, since bots cannot complete the interactive password-change flow.
Preserve password-change enforcement for human accounts and restrictions
for inactive or prohibited accounts.

Fixes: https://github.com/go-gitea/gitea/issues/39542
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: silverwind <me@silverwind.io>

services/context/context_template.go

@@ -69,7 +69,7 @@ func (c TemplateContext) CurrentWebTheme() *webtheme.ThemeMetaInfo {
 
 func (c TemplateContext) ImpersonatedUser() *user_model.User {
 	webCtx := GetWebContext(c)
-	if webCtx == nil || webCtx.Doer == nil || !webCtx.DoerIsImpersonated() {
+	if webCtx == nil || webCtx.Doer == nil || !IsDoerSessionImpersonated(webCtx.Session) {
 		return nil
 	}
 	return webCtx.Doer