feat: 更新SproutGate前后端代码

sproutgate-backend/internal/storage/pending.go

@@ -1,55 +1,34 @@
 package storage
 
 import (
-	"encoding/base64"
 	"errors"
-	"os"
-	"path/filepath"
-	"strings"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
 
 	"sproutgate-backend/internal/models"
 )
 
 func (s *Store) SavePending(record models.PendingUser) error {
-	s.mu.Lock()
-	defer s.mu.Unlock()
-	path := s.pendingFilePath(record.Account)
-	return writeJSONFile(path, record)
+	row := dbPendingFromModel(record)
+	return s.db.Clauses(clause.OnConflict{UpdateAll: true}).Create(&row).Error
 }
 
 func (s *Store) GetPending(account string) (models.PendingUser, bool, error) {
-	s.mu.Lock()
-	defer s.mu.Unlock()
-	path := s.pendingFilePath(account)
-	if _, err := os.Stat(path); errors.Is(err, os.ErrNotExist) {
+	var row DBPendingUser
+	result := s.db.First(&row, "account = ?", account)
+	if errors.Is(result.Error, gorm.ErrRecordNotFound) {
 		return models.PendingUser{}, false, nil
 	}
-	var record models.PendingUser
-	if err := readJSONFile(path, &record); err != nil {
-		return models.PendingUser{}, false, err
+	if result.Error != nil {
+		return models.PendingUser{}, false, result.Error
 	}
-	return record, true, nil
+	return row.toModel(), true, nil
 }
 
 func (s *Store) DeletePending(account string) error {
-	s.mu.Lock()
-	defer s.mu.Unlock()
-	path := s.pendingFilePath(account)
-	if _, err := os.Stat(path); errors.Is(err, os.ErrNotExist) {
-		return nil
-	}
-	return os.Remove(path)
+	return s.db.Delete(&DBPendingUser{}, "account = ?", account).Error
 }
 
-func (s *Store) pendingFilePath(account string) string {
-	return filepath.Join(s.pendingDir, pendingFileName(account))
-}
-
-func pendingFileName(account string) string {
-	safe := strings.TrimSpace(account)
-	if safe == "" {
-		safe = "unknown"
-	}
-	encoded := base64.RawURLEncoding.EncodeToString([]byte(safe))
-	return encoded + ".json"
-}
+// DataDir 返回空字符串（MySQL 模式下无本地数据目录）。
+func (s *Store) DataDir() string { return "" }