refactor: 前后端目录结构模块化 + v2 优化移植与缺陷修复

前端:
- src/srv/api → src/api，按域分文件夹(auth/cluster/host/storage/deployment/collector)
- 新增 http.ts 引擎(http.get/post/put/delete)，域模块改用语义化调用
- index.html 增加 favicon(匹配应用 logo 的 emerald + Activity 脉冲)

后端分层增强(保留包名):
- 新增 repository/：从 models 拆出 JsonDB 持久化层(InitDB/GetDB/Shutdown/RequestSave)
- 新增 dto/：从 controllers 抽出各域请求契约(带 binding 校验)
- 新增 pkg/crypto、pkg/jwt：从 utils 拆出安全原语(外部 jwt 别名 jwtv5 避免冲突)
- models 只留领域实体 + sanitizer；utils 只留 gin/应用相关(response/errors)

v2 优化移植与缺陷修复:
- 移植密钥分离/SSH TOFU/并发写安全/Loki 生产级配置/Docker 加固
- 修复 deployment.go 并发丢更新、Helm values 重复键、EncryptField 哨兵、loki-gateway 端点等审计缺陷
- 实现真正的优雅关停(main.go http.Server + signal + repository.Shutdown)
- 修复登录契约:后端返回 accessToken，前端 auth.ts/Login.tsx 对齐
- 补 crypto/jwt/repository 单元测试(含并发写回归)

验证: go build/vet/test 全绿；npm run build 通过；登录→鉴权→优雅关停冒烟通过

Co-Authored-By: Claude <noreply@anthropic.com>

backend/services/storage.go

@@ -1,9 +1,12 @@
 package services
 
 import (
+	"fmt"
 	"time"
 
 	"lokideploy/models"
+	"lokideploy/pkg/crypto"
+	"lokideploy/repository"
 	"lokideploy/utils"
 )
 
@@ -14,18 +17,24 @@ func NewStorageService() *StorageService {
 }
 
 func (s *StorageService) Create(name, storageType, endpoint, bucket, region, accessKey, secretKey, pathPrefix string, insecure, isDefault bool) (*models.StorageConfig, error) {
-	encAccessKey, _ := utils.Encrypt(accessKey)
-	encSecretKey, _ := utils.Encrypt(secretKey)
+	encAccessKey, err := crypto.EncryptField(accessKey)
+	if err != nil {
+		return nil, fmt.Errorf("AccessKey 加密失败: %w", err)
+	}
+	encSecretKey, err := crypto.EncryptField(secretKey)
+	if err != nil {
+		return nil, fmt.Errorf("SecretKey 加密失败: %w", err)
+	}
 
 	storage := models.StorageConfig{
-		ID:          models.GetDB().NextID("storages"),
+		ID:          repository.GetDB().NextID("storages"),
 		Name:        name,
 		StorageType: storageType,
 		Endpoint:    endpoint,
 		Bucket:      bucket,
 		Region:      region,
-		AccessKey:   "ENC:" + encAccessKey,
-		SecretKey:   "ENC:" + encSecretKey,
+		AccessKey:   encAccessKey,
+		SecretKey:   encSecretKey,
 		PathPrefix:  pathPrefix,
 		Insecure:    insecure,
 		IsDefault:   isDefault,
@@ -33,7 +42,7 @@ func (s *StorageService) Create(name, storageType, endpoint, bucket, region, acc
 		UpdatedAt:   time.Now(),
 	}
 
-	db := models.GetDB()
+	db := repository.GetDB()
 	if isDefault {
 		db.Lock()
 		for i := range db.Storages {
@@ -44,13 +53,13 @@ func (s *StorageService) Create(name, storageType, endpoint, bucket, region, acc
 	db.Lock()
 	db.Storages = append(db.Storages, storage)
 	db.Unlock()
-	go db.Save()
+	db.RequestSave()
 
 	return &storage, nil
 }
 
 func (s *StorageService) Get(id uint) (*models.StorageConfig, error) {
-	db := models.GetDB()
+	db := repository.GetDB()
 	db.RLock()
 	defer db.RUnlock()
 	for i := range db.Storages {
@@ -63,7 +72,7 @@ func (s *StorageService) Get(id uint) (*models.StorageConfig, error) {
 }
 
 func (s *StorageService) List(page, pageSize int) ([]models.StorageConfig, int64, error) {
-	db := models.GetDB()
+	db := repository.GetDB()
 	db.RLock()
 	defer db.RUnlock()
 
@@ -82,7 +91,7 @@ func (s *StorageService) List(page, pageSize int) ([]models.StorageConfig, int64
 }
 
 func (s *StorageService) Update(id uint, updates map[string]interface{}) error {
-	db := models.GetDB()
+	db := repository.GetDB()
 	db.Lock()
 	defer db.Unlock()
 	for i := range db.Storages {
@@ -108,7 +117,7 @@ func (s *StorageService) Update(id uint, updates map[string]interface{}) error {
 				db.Storages[i].IsDefault = v
 			}
 			db.Storages[i].UpdatedAt = time.Now()
-			go db.Save()
+			db.RequestSave()
 			return nil
 		}
 	}
@@ -116,13 +125,13 @@ func (s *StorageService) Update(id uint, updates map[string]interface{}) error {
 }
 
 func (s *StorageService) Delete(id uint) error {
-	db := models.GetDB()
+	db := repository.GetDB()
 	db.Lock()
 	defer db.Unlock()
 	for i, st := range db.Storages {
 		if st.ID == id {
 			db.Storages = append(db.Storages[:i], db.Storages[i+1:]...)
-			go db.Save()
+			db.RequestSave()
 			return nil
 		}
 	}
@@ -130,7 +139,7 @@ func (s *StorageService) Delete(id uint) error {
 }
 
 func (s *StorageService) GetDefault() (*models.StorageConfig, error) {
-	db := models.GetDB()
+	db := repository.GetDB()
 	db.RLock()
 	defer db.RUnlock()
 	for i := range db.Storages {