diff --git a/backend/internal/app/app_test.go b/backend/internal/app/app_test.go
index faa4d82..09780eb 100644
--- a/backend/internal/app/app_test.go
+++ b/backend/internal/app/app_test.go
@@ -4,8 +4,11 @@ import (
 	"context"
 	"path/filepath"
 	"testing"
+	"time"
 
 	"git.pcux.cn/xuans/Scert/backend/internal/config"
+	"git.pcux.cn/xuans/Scert/backend/internal/domain"
+	"git.pcux.cn/xuans/Scert/backend/internal/repository"
 )
 
 func TestNewWiresApplicationServices(t *testing.T) {
@@ -27,3 +30,81 @@ func TestNewWiresApplicationServices(t *testing.T) {
 		t.Fatal("敏感信息、SSH、DNS 或 HTTP 服务未完整注入应用实例")
 	}
 }
+func TestNewWithConfigPathRecoversInterruptedTasks(t *testing.T) {
+	baseDir := t.TempDir()
+	cfg := config.Default(baseDir)
+	configPath := filepath.Join(cfg.Paths.Config, "scert.json")
+
+	first, err := NewWithConfigPath(context.Background(), cfg, configPath)
+	if err != nil {
+		t.Fatalf("首次初始化应用失败：%v", err)
+	}
+
+	item, err := domain.NewDomain("restart.example.com", domain.CertificateSingle, nil)
+	if err != nil {
+		_ = first.Close()
+		t.Fatalf("创建测试域名失败：%v", err)
+	}
+	if err := first.Repository.Create(context.Background(), item); err != nil {
+		_ = first.Close()
+		t.Fatalf("保存测试域名失败：%v", err)
+	}
+
+	now := time.Date(2026, 8, 30, 12, 0, 0, 0, time.UTC)
+	tasks := []repository.Task{
+		{ID: "restart-queued", DomainID: item.ID, TaskType: "certificate_issue", Status: "queued", Stage: "queued", Message: "等待执行", CreatedAt: now, UpdatedAt: now},
+		{ID: "restart-running", DomainID: item.ID, TaskType: "certificate_deploy", Status: "running", Stage: "deploy", Message: "正在部署", StartedAt: &now, CreatedAt: now, UpdatedAt: now},
+		{ID: "restart-success", DomainID: item.ID, TaskType: "certificate_validate", Status: "success", Stage: "validate", Message: "已完成", FinishedAt: &now, CreatedAt: now, UpdatedAt: now},
+	}
+	for _, task := range tasks {
+		if err := first.Tasks.CreateTask(context.Background(), task); err != nil {
+			_ = first.Close()
+			t.Fatalf("保存测试任务 %s 失败：%v", task.ID, err)
+		}
+	}
+	attempt := repository.TaskAttempt{
+		ID: "restart-attempt", TaskID: "restart-running", AttemptNumber: 1, Stage: "deploy", Status: "running", Message: "正在部署", StartedAt: &now, CreatedAt: now,
+	}
+	if err := first.Tasks.CreateAttempt(context.Background(), attempt); err != nil {
+		_ = first.Close()
+		t.Fatalf("保存测试任务尝试失败：%v", err)
+	}
+	if err := first.Close(); err != nil {
+		t.Fatalf("关闭首次应用失败：%v", err)
+	}
+
+	second, err := NewWithConfigPath(context.Background(), cfg, configPath)
+	if err != nil {
+		t.Fatalf("重启后初始化应用失败：%v", err)
+	}
+	defer second.Close()
+
+	for _, expectedID := range []string{"restart-queued", "restart-running"} {
+		task, getErr := second.Tasks.GetTask(context.Background(), expectedID)
+		if getErr != nil {
+			t.Fatalf("读取恢复任务 %s 失败：%v", expectedID, getErr)
+		}
+		if task.Status != "failed" || task.Stage != "service_restart" || task.FinishedAt == nil {
+			t.Fatalf("任务 %s 未按服务重启恢复：%+v", expectedID, task)
+		}
+		if task.Message != "服务重启导致任务中断，请重新执行" {
+			t.Fatalf("任务 %s 中断说明不正确：%s", expectedID, task.Message)
+		}
+	}
+
+	recoveredAttempt, err := second.Tasks.ListAttempts(context.Background(), "restart-running")
+	if err != nil {
+		t.Fatalf("读取恢复任务尝试失败：%v", err)
+	}
+	if len(recoveredAttempt) != 1 || recoveredAttempt[0].Status != "failed" || recoveredAttempt[0].FinishedAt == nil {
+		t.Fatalf("任务尝试未按服务重启恢复：%+v", recoveredAttempt)
+	}
+
+	completed, err := second.Tasks.GetTask(context.Background(), "restart-success")
+	if err != nil {
+		t.Fatalf("读取已完成任务失败：%v", err)
+	}
+	if completed.Status != "success" || completed.Stage != "validate" || completed.Message != "已完成" {
+		t.Fatalf("已完成任务不应被重启恢复逻辑修改：%+v", completed)
+	}
+}