后端与全仓代码质量清理（golangci 扩展集 · 测试质量 · 并发安全 · 文档同步）

代码质量全量清理，零行为变化：golangci 扩展集 13 类 linter（gosec/modernize/perfsprint/canonicalheader/usestdlibvars/wastedassign/intrange/errorlint/forcetypeassert/recvcheck/exhaustive/unparam）全量修复，测试代码质量（testifylint/thelper/usetesting）25→0，frpc 进程生命周期真 bug（进程组击杀）、全仓 go test -race 6 类数据竞争（含 1 个生产竞争）、SPDX license 头补齐 131 文件、前端测试套件 next-intl 迁移后 44 失败→全绿、过期 swagger 文档重新生成、pnpm-workspace 构建审批。

Experiments: #2-#17, #18, #20, #21, #23
Metric: total_issues 108 → 8 (-92.6%)

internal/apps/openflare/pages/helpers.go

@@ -80,18 +80,11 @@ func resolvePagesLimits(ctx context.Context) pagesLimits {
 
 	historyCount := defaultPagesMaxHistoryCount
 	if value, err := repository.GetIntByKey(ctx, model.ConfigKeyPagesMaxHistoryCount); err == nil {
-		if value < 0 {
-			historyCount = 0
-		} else {
-			historyCount = value
-		}
+		historyCount = max(value, 0)
 	}
 
 	packageBytes := int64(packageMB) * bytesPerMiB
-	extractedBytes := packageBytes * pagesExtractedSizeMultiplier
-	if extractedBytes < pagesMinExtractedSizeBytes {
-		extractedBytes = pagesMinExtractedSizeBytes
-	}
+	extractedBytes := max(packageBytes*pagesExtractedSizeMultiplier, pagesMinExtractedSizeBytes)
 
 	return pagesLimits{
 		PackageBytes:   packageBytes,
@@ -154,7 +147,7 @@ func normalizePagesFallbackPath(raw string) (string, error) {
 			return "", errors.New("spa fallback 回退路径不能包含空白或控制字符")
 		}
 	}
-	for _, segment := range strings.Split(value, "/") {
+	for segment := range strings.SplitSeq(value, "/") {
 		if segment == "." || segment == ".." {
 			return "", errors.New("spa fallback 回退路径不能包含 . 或 .. 路径段")
 		}
@@ -233,6 +226,8 @@ func safeTempSuffix(format pagesarchive.Format) string {
 		return "7z"
 	case pagesarchive.FormatTar:
 		return "tar"
+	case pagesarchive.FormatZip:
+		return "zip"
 	default:
 		return "zip"
 	}