modernize 37→5（-32）：interface{}→any、内置 max/min、slices/maps 辅助、strings.Cut/SplitSeq、strings.Builder（修复 mail.go O(n²) 拼接）。逐 hunk 核对语义等价；omitzero 冲突修复被自动跳过（wire 格式不变）；手动清 4 处遗留 sort import + 2 处 QF1012。

Result: {"status":"keep","total_issues":74,"golint_canonicalheader":8,"golint_errname":1,"golint_errorlint":12,"golint_forcetypeassert":3,"golint_gosec":0,"golint_intrange":3,"golint_modernize":5,"golint_nilnil":3,"golint_perfsprint":18,"golint_prealloc":3,"golint_recvcheck":7,"golint_usestdlibvars":3,"golint_wastedassign":7,"golint_total":73,"eslint_problems":1,"eslint_errors":0,"eslint_warnings":1,"tsc_errors":0,"measure_s":38}

internal/apps/upload/ingest/helpers.go

@@ -59,8 +59,8 @@ func validateAllowedExtension(ctx context.Context, ext string) error {
 		return nil
 	}
 
-	allowedExts := strings.Split(strings.ToLower(sc.Value), ",")
-	for _, allowedExt := range allowedExts {
+	allowedExts := strings.SplitSeq(strings.ToLower(sc.Value), ",")
+	for allowedExt := range allowedExts {
 		if strings.TrimSpace(allowedExt) == ext {
 			return nil
 		}

internal/apps/upload/task/storage_migration.go

@@ -193,18 +193,18 @@ func migrateObjects(
 	const batchSize = 50
 	const migrationConcurrency = 10
 	const sha256HexLength = 64
-	var migrated int64
+	var migrated atomic.Int64
 	var lastFilePath string
 	for {
 		if err := ctx.Err(); err != nil {
-			return atomic.LoadInt64(&migrated), fmt.Errorf("storage migration canceled: %w", err)
+			return migrated.Load(), fmt.Errorf("storage migration canceled: %w", err)
 		}
 
-		task.AppendLog(ctx, "正在查询待迁移对象批次，当前已完成迁移: %d/%d", atomic.LoadInt64(&migrated), total)
+		task.AppendLog(ctx, "正在查询待迁移对象批次，当前已完成迁移: %d/%d", migrated.Load(), total)
 
 		objects, err := repository.ListDistinctActiveStorageObjects(ctx, lastFilePath, batchSize)
 		if err != nil {
-			return atomic.LoadInt64(&migrated), fmt.Errorf("query source objects: %w", err)
+			return migrated.Load(), fmt.Errorf("query source objects: %w", err)
 		}
 		if len(objects) == 0 {
 			task.AppendLog(ctx, "所有对象迁移完毕")
@@ -223,18 +223,18 @@ func migrateObjects(
 				if err := migrateSingleObject(ctx, sourceBackend, targetBackend, obj, sha256HexLength); err != nil {
 					return err
 				}
-				atomic.AddInt64(&migrated, 1)
+				migrated.Add(1)
 				return nil
 			})
 		}
 
 		if err := g.Wait(); err != nil {
-			return atomic.LoadInt64(&migrated), err
+			return migrated.Load(), err
 		}
 
-		task.AppendLog(ctx, "当前批次迁移完成。迁移进度: %d/%d", atomic.LoadInt64(&migrated), total)
+		task.AppendLog(ctx, "当前批次迁移完成。迁移进度: %d/%d", migrated.Load(), total)
 	}
-	return atomic.LoadInt64(&migrated), nil
+	return migrated.Load(), nil
 }
 
 func migrateSingleObject(

internal/apps/upload/util/media.go

@@ -4,6 +4,7 @@
 package util
 
 import (
+	"slices"
 	"strings"
 
 	"github.com/Rain-kl/Wavelet/internal/apps/upload/shared"
@@ -11,32 +12,17 @@ import (
 
 // IsImageExtension reports whether ext is a common image format.
 func IsImageExtension(ext string) bool {
-	for _, imgExt := range []string{"jpg", "jpeg", "png", "webp", "gif"} {
-		if ext == imgExt {
-			return true
-		}
-	}
-	return false
+	return slices.Contains([]string{"jpg", "jpeg", "png", "webp", "gif"}, ext)
 }
 
 // IsArchiveExtension reports whether ext is a common archive format.
 func IsArchiveExtension(ext string) bool {
-	for _, e := range []string{"zip", "rar", "7z", "tar", "gz", "tgz", "bz2", "xz"} {
-		if ext == e {
-			return true
-		}
-	}
-	return false
+	return slices.Contains([]string{"zip", "rar", "7z", "tar", "gz", "tgz", "bz2", "xz"}, ext)
 }
 
 // IsDocumentExtension reports whether ext is a common document format.
 func IsDocumentExtension(ext string) bool {
-	for _, e := range []string{"pdf", "doc", "docx", "xls", "xlsx", "ppt", "pptx", "txt", "md", "csv", "json", "yaml", "yml", "xml"} {
-		if ext == e {
-			return true
-		}
-	}
-	return false
+	return slices.Contains([]string{"pdf", "doc", "docx", "xls", "xlsx", "ppt", "pptx", "txt", "md", "csv", "json", "yaml", "yml", "xml"}, ext)
 }
 
 // NormalizeImageQuality normalizes the requested image quality query parameter.