diff --git a/backend/controllers/cluster.go b/backend/controllers/cluster.go
index 7291fbe..dfa7cce 100644
--- a/backend/controllers/cluster.go
+++ b/backend/controllers/cluster.go
@@ -148,7 +148,7 @@ func (ctrl *ClusterController) Validate(c *gin.Context) {
 		utils.BadRequest(c, "ID 无效")
 		return
 	}
-	go ctrl.service.Validate(uint(id))
+	go ctrl.service.Validate(context.Background(), uint(id))
 	utils.Success(c, gin.H{"message": "已开始验证连接"})
 }
 
diff --git a/backend/controllers/deployment.go b/backend/controllers/deployment.go
index 84aa7b0..a2a3dcb 100644
--- a/backend/controllers/deployment.go
+++ b/backend/controllers/deployment.go
@@ -217,7 +217,7 @@ func (ctrl *DeploymentController) GetUsage(c *gin.Context) {
 		utils.BadRequest(c, "ID 无效")
 		return
 	}
-	usage, err := ctrl.service.GetUsage(uint(id))
+	usage, err := ctrl.service.GetUsage(c.Request.Context(), uint(id))
 	if err != nil {
 		utils.Error(c, 400, err.Error())
 		return
diff --git a/backend/controllers/host.go b/backend/controllers/host.go
index 4bb614f..7739d33 100644
--- a/backend/controllers/host.go
+++ b/backend/controllers/host.go
@@ -1,6 +1,7 @@
 package controllers
 
 import (
+	"context"
 	"lokistack/dto"
 	"lokistack/models"
 	"lokistack/services"
@@ -94,7 +95,7 @@ func (ctrl *HostController) Validate(c *gin.Context) {
 		utils.BadRequest(c, "ID 无效")
 		return
 	}
-	go ctrl.service.Validate(uint(id))
+	go ctrl.service.Validate(context.Background(), uint(id))
 	utils.Success(c, gin.H{"message": "validation started"})
 }
 
diff --git a/backend/repository/db.go b/backend/repository/db.go
index 0ef44b7..4d61b55 100644
--- a/backend/repository/db.go
+++ b/backend/repository/db.go
@@ -264,11 +264,6 @@ func (d *JsonDB) fixUnreachableLogSourceURLs() {
 //	LogSource   : 查询页数据源下拉选不动（两个 option 同 value）
 //	AlertRule   : 规则列表出现两条同 id，编辑/删除操作命中错的那条
 //	NotifyChannel: 通知渠道覆盖错对象
-func (d *JsonDB) dedupeCollectionIDs() {
-	d.dedupeLogSourceIDs()
-	d.dedupeAlertRuleIDs()
-	d.dedupeNotifyChannelIDs()
-}
 
 // dedupeAlertRuleIDs 重新编号重复的告警规则 ID。
 // 同名规则（seed 重复执行导致）只保留第一条，其余删除。
@@ -539,6 +534,108 @@ func (d *JsonDB) migrateSchema() bool {
 	return true
 }
 
+// Reload 从磁盘重新加载内存态(备份恢复后调用):
+// 成功解析才整体替换集合并重建 ID 序列;失败时保持原内存态并返回错误。
+// 必须在持有写锁的情况下调用。
+func (d *JsonDB) Reload() error {
+	data, err := os.ReadFile(d.dataFile)
+	if err != nil {
+		return err
+	}
+	var fresh JsonDB
+	if err := json.Unmarshal(data, &fresh); err != nil {
+		return err
+	}
+	d.Users = fresh.Users
+	d.Clusters = fresh.Clusters
+	d.Hosts = fresh.Hosts
+	d.Storages = fresh.Storages
+	d.Deployments = fresh.Deployments
+	d.Collectors = fresh.Collectors
+	d.Logs = fresh.Logs
+	d.Settings = fresh.Settings
+	d.LogSources = fresh.LogSources
+	d.AlertRules = fresh.AlertRules
+	d.AlertDeliveries = fresh.AlertDeliveries
+	d.NotifyChannels = fresh.NotifyChannels
+	d.LogPolicyGroups = fresh.LogPolicyGroups
+	d.AuditLogs = fresh.AuditLogs
+	d.DailyVolumeSnapshots = fresh.DailyVolumeSnapshots
+	d.SchemaVersion = fresh.SchemaVersion
+	d.sequences = map[string]uint{}
+	for _, u := range d.Users {
+		if u.ID > d.sequences["users"] {
+			d.sequences["users"] = u.ID
+		}
+	}
+	for _, cl := range d.Clusters {
+		if cl.ID > d.sequences["clusters"] {
+			d.sequences["clusters"] = cl.ID
+		}
+	}
+	for _, h := range d.Hosts {
+		if h.ID > d.sequences["hosts"] {
+			d.sequences["hosts"] = h.ID
+		}
+	}
+	for _, s := range d.Storages {
+		if s.ID > d.sequences["storages"] {
+			d.sequences["storages"] = s.ID
+		}
+	}
+	for _, de := range d.Deployments {
+		if de.ID > d.sequences["deployments"] {
+			d.sequences["deployments"] = de.ID
+		}
+	}
+	for _, col := range d.Collectors {
+		if col.ID > d.sequences["collectors"] {
+			d.sequences["collectors"] = col.ID
+		}
+	}
+	for _, l := range d.Logs {
+		if l.ID > d.sequences["logs"] {
+			d.sequences["logs"] = l.ID
+		}
+	}
+	for _, g := range d.LogPolicyGroups {
+		if g.ID > d.sequences["logPolicyGroups"] {
+			d.sequences["logPolicyGroups"] = g.ID
+		}
+	}
+	for _, s := range d.LogSources {
+		if s.ID > d.sequences["logSources"] {
+			d.sequences["logSources"] = s.ID
+		}
+	}
+	for _, ch := range d.NotifyChannels {
+		if ch.ID > d.sequences["notifyChannels"] {
+			d.sequences["notifyChannels"] = ch.ID
+		}
+	}
+	for _, r := range d.AlertRules {
+		if r.ID > d.sequences["alertRules"] {
+			d.sequences["alertRules"] = r.ID
+		}
+	}
+	for _, de := range d.AlertDeliveries {
+		if de.ID > d.sequences["alertDeliveries"] {
+			d.sequences["alertDeliveries"] = de.ID
+		}
+	}
+	for _, a := range d.AuditLogs {
+		if a.ID > d.sequences["auditLogs"] {
+			d.sequences["auditLogs"] = a.ID
+		}
+	}
+	for _, v := range d.DailyVolumeSnapshots {
+		if v.ID > d.sequences["dailyVolumeSnapshots"] {
+			d.sequences["dailyVolumeSnapshots"] = v.ID
+		}
+	}
+	return nil
+}
+
 // migrateLegacyDataFile 首次从历史命名(opsxloki.json / lokideploy.json)加载后,
 // 立即升级到 lokistack.json:数据原子写入新文件后删除旧文件。
 // 不迁移的话回退链会让旧文件名(旧品牌残留)一直被沿用下去。
diff --git a/backend/services/backup.go b/backend/services/backup.go
index f429e2b..06d5192 100644
--- a/backend/services/backup.go
+++ b/backend/services/backup.go
@@ -281,7 +281,12 @@ func encryptionKeyFingerprint() string {
 
 // ApplyStagedBackup 把暂存文件应用为正式 DB（调用方负责重启进程）。
 func ApplyStagedBackup() (string, error) {
-	staged := filepath.Join(dataDirPath(), ".restore-pending", "opsxloki.json")
+	restoreDir := filepath.Join(dataDirPath(), ".restore-pending")
+	staged := filepath.Join(restoreDir, "lokistack.json")
+	if _, err := os.Stat(staged); err != nil {
+		// 兼容旧版暂存文件名
+		staged = filepath.Join(restoreDir, "opsxloki.json")
+	}
 	b, err := os.ReadFile(staged)
 	if err != nil {
 		return "", fmt.Errorf("没有待应用的恢复文件: %w", err)
@@ -305,6 +310,16 @@ func ApplyStagedBackup() (string, error) {
 		return "", err
 	}
 	_ = os.Remove(staged)
+	// 关键:立即把内存态切换为恢复后的数据。否则「替换文件 → 重启」之间,
+	// 任何一次防抖落盘都会用旧内存态把恢复文件覆盖回去,恢复静默失效。
+	if db := repository.GetDB(); db != nil {
+		db.Lock()
+		if err := db.Reload(); err != nil {
+			db.Unlock()
+			return dbPath, fmt.Errorf("恢复文件已生效但内存重载失败(%v),请立即重启进程", err)
+		}
+		db.Unlock()
+	}
 	return dbPath, nil
 }
 
diff --git a/backend/services/cluster.go b/backend/services/cluster.go
index 555a67c..e6b9009 100644
--- a/backend/services/cluster.go
+++ b/backend/services/cluster.go
@@ -107,7 +107,7 @@ func (s *ClusterService) Create(name, description, configType, apiServer, kubeco
 	db.Unlock()
 	db.RequestSave()
 
-	go s.Validate(cluster.ID)
+	go s.Validate(context.Background(), cluster.ID)
 	return &cluster, nil
 }
 
@@ -222,12 +222,12 @@ func (s *ClusterService) Delete(id uint) error {
 	return utils.ErrNotFound
 }
 
-func (s *ClusterService) Validate(id uint) {
+func (s *ClusterService) Validate(ctx context.Context, id uint) {
 	cluster, err := s.Get(id)
 	if err != nil {
 		return
 	}
-	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
+	ctx, cancel := context.WithTimeout(ctx, 30*time.Second)
 	defer cancel()
 
 	info, err := GetClusterInfo(ctx, cluster)
diff --git a/backend/services/collector.go b/backend/services/collector.go
index 7caafef..75a043a 100644
--- a/backend/services/collector.go
+++ b/backend/services/collector.go
@@ -4,7 +4,9 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"log"
 	"strings"
+	"sync"
 	"time"
 
 	"lokistack/models"
@@ -12,10 +14,36 @@ import (
 	"lokistack/utils"
 )
 
-type CollectorService struct{}
+type CollectorService struct {
+	// opsMu 保护 opsInflight:同一采集器的安装/卸载互斥去重。
+	// 采集器是 fire-and-forget(接口立即返回),没有去重时连点「部署」
+	// 会对同一主机并发 docker rm -f + docker run,容器名冲突/配置互踩。
+	opsMu       sync.Mutex
+	opsInflight map[uint]bool
+}
 
 func NewCollectorService() *CollectorService {
-	return &CollectorService{}
+	return &CollectorService{opsInflight: map[uint]bool{}}
+}
+
+// beginOp 声明开始一次安装/卸载;已在进行返回 false(直接忽略重复触发)
+func (s *CollectorService) beginOp(id uint) bool {
+	s.opsMu.Lock()
+	defer s.opsMu.Unlock()
+	if s.opsInflight == nil {
+		s.opsInflight = map[uint]bool{}
+	}
+	if s.opsInflight[id] {
+		return false
+	}
+	s.opsInflight[id] = true
+	return true
+}
+
+func (s *CollectorService) endOp(id uint) {
+	s.opsMu.Lock()
+	delete(s.opsInflight, id)
+	s.opsMu.Unlock()
 }
 
 type CreateCollectorRequest struct {
@@ -475,17 +503,23 @@ func (s *CollectorService) Delete(id uint) error {
 	}
 	db.Unlock()
 	db.RequestSave()
-	// 异步卸载（用拷贝的 collector，避免删除后取不到）
+	// 异步卸载（用拷贝的 collector，避免删除后取不到；失败留日志，远端不留孤儿容器也无提示）
 	go func() {
 		ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
 		defer cancel()
-		NewCollectorDeployer(collector, collector.LokiDeployment, nil).Uninstall(ctx)
+		if err := NewCollectorDeployer(collector, collector.LokiDeployment, nil).Uninstall(ctx); err != nil {
+			log.Printf("[collector] 删除后卸载 %q(目标 %s)失败: %v", collector.Name, collector.Name, err)
+		}
 	}()
 	return nil
 }
 
 // Install 异步部署采集器
 func (s *CollectorService) Install(id uint) {
+	if !s.beginOp(id) {
+		return // 同一采集器的安装/卸载正在进行,忽略重复触发
+	}
+	defer s.endOp(id)
 	collector, err := s.Get(id)
 	if err != nil {
 		return
@@ -522,6 +556,10 @@ func (s *CollectorService) Install(id uint) {
 
 // Uninstall 异步卸载采集器
 func (s *CollectorService) Uninstall(id uint) {
+	if !s.beginOp(id) {
+		return
+	}
+	defer s.endOp(id)
 	collector, err := s.Get(id)
 	if err != nil {
 		return
diff --git a/backend/services/deployment_usage.go b/backend/services/deployment_usage.go
index 0b1309b..92ad693 100644
--- a/backend/services/deployment_usage.go
+++ b/backend/services/deployment_usage.go
@@ -69,18 +69,18 @@ type podMetricsResponse struct {
 }
 
 // GetUsage 采集某个 Loki 部署的资源用量（按部署模式分派）。
-func (s *DeploymentService) GetUsage(id uint) (*ResourceUsage, error) {
+func (s *DeploymentService) GetUsage(ctx context.Context, id uint) (*ResourceUsage, error) {
 	d, err := s.Get(id)
 	if err != nil {
 		return nil, err
 	}
 	switch d.Mode {
 	case "k8s-yaml":
-		return s.k8sUsage(d)
+		return s.k8sUsage(ctx, d)
 	case "host-docker":
-		return s.dockerUsage(d)
+		return s.dockerUsage(ctx, d)
 	case "host-binary":
-		return s.processUsage(d)
+		return s.processUsage(ctx, d)
 	default:
 		return nil, fmt.Errorf("不支持的部署模式：%s", d.Mode)
 	}
@@ -88,7 +88,7 @@ func (s *DeploymentService) GetUsage(id uint) (*ResourceUsage, error) {
 
 // ---------- Kubernetes ----------
 
-func (s *DeploymentService) k8sUsage(d *models.LokiDeployment) (*ResourceUsage, error) {
+func (s *DeploymentService) k8sUsage(ctx context.Context, d *models.LokiDeployment) (*ResourceUsage, error) {
 	if d.Cluster == nil {
 		return nil, fmt.Errorf("部署未关联 Kubernetes 集群")
 	}
@@ -96,7 +96,7 @@ func (s *DeploymentService) k8sUsage(d *models.LokiDeployment) (*ResourceUsage,
 	if err != nil {
 		return nil, err
 	}
-	ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
+	ctx, cancel := context.WithTimeout(ctx, 15*time.Second)
 	defer cancel()
 
 	ns := d.Namespace
@@ -192,7 +192,7 @@ func (s *DeploymentService) applyPrometheus(u *ResourceUsage) {
 
 // ---------- host-docker ----------
 
-func (s *DeploymentService) dockerUsage(d *models.LokiDeployment) (*ResourceUsage, error) {
+func (s *DeploymentService) dockerUsage(ctx context.Context, d *models.LokiDeployment) (*ResourceUsage, error) {
 	if d.Host == nil {
 		return nil, fmt.Errorf("部署未关联主机")
 	}
@@ -202,7 +202,7 @@ func (s *DeploymentService) dockerUsage(d *models.LokiDeployment) (*ResourceUsag
 	}
 	defer client.Close()
 
-	ctx, cancel := context.WithTimeout(context.Background(), 20*time.Second)
+	ctx, cancel := context.WithTimeout(ctx, 20*time.Second)
 	defer cancel()
 
 	name := dockerContainerName(d.ID)
@@ -254,7 +254,7 @@ func (s *DeploymentService) dockerUsage(d *models.LokiDeployment) (*ResourceUsag
 
 // ---------- host-binary ----------
 
-func (s *DeploymentService) processUsage(d *models.LokiDeployment) (*ResourceUsage, error) {
+func (s *DeploymentService) processUsage(ctx context.Context, d *models.LokiDeployment) (*ResourceUsage, error) {
 	if d.Host == nil {
 		return nil, fmt.Errorf("部署未关联主机")
 	}
@@ -264,7 +264,7 @@ func (s *DeploymentService) processUsage(d *models.LokiDeployment) (*ResourceUsa
 	}
 	defer client.Close()
 
-	ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
+	ctx, cancel := context.WithTimeout(ctx, 15*time.Second)
 	defer cancel()
 
 	usage := &ResourceUsage{Mode: d.Mode, Source: "binary", Pod: "loki", Node: d.Host.HostIP}
diff --git a/backend/services/host.go b/backend/services/host.go
index 256bc14..d5b74ed 100644
--- a/backend/services/host.go
+++ b/backend/services/host.go
@@ -88,7 +88,7 @@ func (s *HostService) Create(name, hostIP string, port int, user, authType, pass
 	db.Unlock()
 	db.RequestSave()
 
-	go s.Validate(host.ID)
+	go s.Validate(context.Background(), host.ID)
 	return &host, nil
 }
 
@@ -194,12 +194,12 @@ func (s *HostService) Delete(id uint) error {
 	return utils.ErrNotFound
 }
 
-func (s *HostService) Validate(id uint) {
+func (s *HostService) Validate(ctx context.Context, id uint) {
 	host, err := s.Get(id)
 	if err != nil {
 		return
 	}
-	ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
+	ctx, cancel := context.WithTimeout(ctx, 15*time.Second)
 	defer cancel()
 
 	client, err := NewSSHClientWithAuth(HostSSHAuth(host))