chore: sqlite 默认数据库文件调整为 db/openteam.db，运行时自动创建目录

backend/internal/store/db.go

@@ -3,6 +3,8 @@ package store
 import (
 	"fmt"
 	"log"
+	"os"
+	"path/filepath"
 	"opencatd-open/pkg/config"
 
 	_ "github.com/lib/pq"
@@ -15,11 +17,17 @@ import (
 var DB *gorm.DB
 
 func InitDB(cfg *config.Config) (*gorm.DB, error) {
-	var dialector gorm.Dialector
+	var (
+		dialector gorm.Dialector
+		err       error
+	)
 
 	switch cfg.DB_Type {
 	case "sqlite":
-		dialector = sqliteDialector(cfg.DSN)
+		dialector, err = sqliteDialector(cfg.DSN)
+		if err != nil {
+			return nil, err
+		}
 	case "postgres":
 		dialector = postgresDialector(cfg.DSN)
 	case "mysql":
@@ -48,11 +56,17 @@ func InitDB(cfg *config.Config) (*gorm.DB, error) {
 	return db, nil
 }
 
-func sqliteDialector(dsn string) gorm.Dialector {
+func sqliteDialector(dsn string) (gorm.Dialector, error) {
 	if dsn == "" {
-		dsn = "opencatd.db"
+		dsn = "db/openteam.db"
 	}
-	return gormlite.Open(dsn)
+	// sqlite 不会自动创建上级目录，先确保它存在（与 docker-compose 挂载的 /app/db 对应）
+	if dir := filepath.Dir(dsn); dir != "." && dir != string(filepath.Separator) {
+		if err := os.MkdirAll(dir, 0o755); err != nil {
+			return nil, fmt.Errorf("failed to create database directory %s: %w", dir, err)
+		}
+	}
+	return gormlite.Open(dsn), nil
 }
 
 func postgresDialector(dsn string) gorm.Dialector {