style: use += operator for string concatenation (gocritic)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Crash--

model/vfs/vfss3/fsck.go

@@ -14,7 +14,6 @@ import (
 	"github.com/minio/minio-go/v7"
 )
 
-
 func (sfs *s3VFS) Fsck(accumulate func(log *vfs.FsckLog), failFast bool) error {
 	entries := make(map[string]*vfs.TreeFile, 1024)
 	tree, err := sfs.BuildTree(func(f *vfs.TreeFile) {

model/vfs/vfss3/impl.go

@@ -75,7 +75,7 @@ func BucketName(orgID, bucketPrefix string) string {
 	}
 	name = strings.TrimRight(name, "-")
 	if len(name) < 3 {
-		name = name + strings.Repeat("0", 3-len(name))
+		name += strings.Repeat("0", 3-len(name))
 	}
 	return name
 }

model/vfs/vfss3/thumbs.go

@@ -37,12 +37,12 @@ type thumbsS3 struct {
 }
 
 type s3Thumb struct {
-	pw      *io.PipeWriter
-	errCh   chan error
-	client  *minio.Client
-	bucket  string
-	name    string
-	ctx     context.Context
+	pw     *io.PipeWriter
+	errCh  chan error
+	client *minio.Client
+	bucket string
+	name   string
+	ctx    context.Context
 }
 
 func (t *s3Thumb) Write(p []byte) (int, error) {

pkg/appfs/s3.go

@@ -101,7 +101,7 @@ func (f *s3Copier) Copy(stat os.FileInfo, src io.Reader) error {
 	}
 
 	meta := map[string]string{
-		"X-Content-Encoding":     "br",
+		"X-Content-Encoding":      "br",
 		"Original-Content-Length": strconv.FormatInt(stat.Size(), 10),
 	}