Fix various bugs (#35684) (#35696)

Backport #35684 by wxiaoguang

services/secrets/validation_test.go

@@ -0,0 +1,29 @@
+// Copyright 2025 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package secrets
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestValidateName(t *testing.T) {
+	cases := []struct {
+		name  string
+		valid bool
+	}{
+		{"FOO", true},
+		{"FOO1_BAR2", true},
+		{"_FOO", true}, // really? why support this
+		{"1FOO", false},
+		{"giteA_xx", false},
+		{"githuB_xx", false},
+		{"cI", false},
+	}
+	for _, c := range cases {
+		err := ValidateName(c.name)
+		assert.Equal(t, c.valid, err == nil, "ValidateName(%q)", c.name)
+	}
+}