Fix push time bug (#36693)

When display or search branch's pushed time, we should use
`updated_unix` rather than `commit_time`.

Fix #36633

---------

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

models/git/branch_test.go

@@ -6,14 +6,17 @@ package git_test
 import (
 	"context"
 	"testing"
+	"time"
 
 	"code.gitea.io/gitea/models/db"
 	git_model "code.gitea.io/gitea/models/git"
 	issues_model "code.gitea.io/gitea/models/issues"
 	repo_model "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/models/unittest"
+	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/optional"
+	"code.gitea.io/gitea/modules/timeutil"
 
 	"github.com/stretchr/testify/assert"
 )
@@ -63,6 +66,36 @@ func TestGetDeletedBranch(t *testing.T) {
 	assert.NotNil(t, getDeletedBranch(t, firstBranch))
 }
 
+func TestFindRecentlyPushedNewBranchesUsesPushTime(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+
+	repo := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{ID: 10})
+	doer := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 12})
+	branch := unittest.AssertExistsAndLoadBean(t, &git_model.Branch{RepoID: repo.ID, Name: "outdated-new-branch"})
+
+	commitUnix := time.Now().Add(-3 * time.Hour).Unix()
+	pushUnix := time.Now().Add(-30 * time.Minute).Unix()
+	_, err := db.GetEngine(t.Context()).Exec(
+		"UPDATE branch SET commit_time = ?, updated_unix = ? WHERE id = ?",
+		commitUnix,
+		pushUnix,
+		branch.ID,
+	)
+	assert.NoError(t, err)
+
+	branches, err := git_model.FindRecentlyPushedNewBranches(t.Context(), doer, git_model.FindRecentlyPushedNewBranchesOptions{
+		Repo:            repo,
+		BaseRepo:        repo,
+		PushedAfterUnix: time.Now().Add(-time.Hour).Unix(),
+		MaxCount:        1,
+	})
+	assert.NoError(t, err)
+	if assert.Len(t, branches, 1) {
+		assert.Equal(t, branch.Name, branches[0].BranchName)
+		assert.Equal(t, timeutil.TimeStamp(pushUnix), branches[0].PushedTime)
+	}
+}
+
 func TestDeletedBranchLoadUser(t *testing.T) {
 	assert.NoError(t, unittest.PrepareTestDatabase())