fix(idgen): retry snowflake generation and error on negative ID

NextUint64ID now retries up to 3 times when Int64() is negative, then
returns an error instead of 0 or Fatalf. All call sites propagate the
error to avoid GORM omitting zero-value primary keys.

internal/model/errs.go

@@ -5,6 +5,7 @@ package model
 
 const (
 	errRegistrationDisabled                 = "注册已关闭"
+	errInvalidUserID                        = "用户 ID 生成失败"
 	errDatabaseNotInitialized               = "database not initialized"
 	errUsernameExists                       = "用户名已存在"
 	errEmailAlreadyBound                    = "该邮箱已被其他账号绑定"

internal/model/task_execution.go

@@ -60,7 +60,11 @@ func (TaskExecution) TableName() string {
 
 // CreateTaskExecution 创建任务执行记录
 func CreateTaskExecution(ctx context.Context, execution *TaskExecution) error {
-	execution.ID = idgen.NextUint64ID()
+	id, err := idgen.NextUint64ID()
+	if err != nil {
+		return err
+	}
+	execution.ID = id
 	return db.DB(ctx).Create(execution).Error
 }
 

internal/model/users.go

@@ -12,6 +12,7 @@ import (
 	"time"
 
 	"github.com/Rain-kl/Wavelet/internal/common"
+	"github.com/Rain-kl/Wavelet/internal/db/idgen"
 	"github.com/Rain-kl/Wavelet/pkg/util"
 	"gorm.io/gorm"
 )
@@ -44,7 +45,7 @@ func (u *OAuthUserInfo) GetID() uint64 {
 
 // User 用户表实体
 type User struct {
-	ID          uint64    `json:"id" gorm:"primaryKey"`
+	ID          uint64    `json:"id,string" gorm:"primaryKey;not null"`
 	Username    string    `json:"username" gorm:"size:64;uniqueIndex"`
 	Password    string    `json:"password,omitempty" gorm:"size:255"`
 	Nickname    string    `json:"nickname" gorm:"size:255"`
@@ -129,6 +130,18 @@ func (u *User) CheckActive() error {
 	return nil
 }
 
+func (u *User) assignIDIfMissing() error {
+	if u.ID != 0 {
+		return nil
+	}
+	id, err := idgen.NextUint64ID()
+	if err != nil {
+		return errors.New(errInvalidUserID)
+	}
+	u.ID = id
+	return nil
+}
+
 // CreateUser 创建新用户（用于 OAuth/OIDC 自动注册，含底层权限校验）
 func (u *User) CreateUser(ctx context.Context, tx *gorm.DB, oauthInfo *OAuthUserInfo) error {
 	enabled, err := GetBoolByKey(ctx, ConfigKeyRegistrationEnabled)
@@ -137,8 +150,9 @@ func (u *User) CreateUser(ctx context.Context, tx *gorm.DB, oauthInfo *OAuthUser
 	}
 
 	now := time.Now()
+	userID := oauthInfo.GetID()
 	newUser := User{
-		ID:          oauthInfo.GetID(),
+		ID:          userID,
 		Username:    oauthInfo.Username,
 		Nickname:    oauthInfo.Name,
 		Email:       oauthInfo.Email,
@@ -147,6 +161,9 @@ func (u *User) CreateUser(ctx context.Context, tx *gorm.DB, oauthInfo *OAuthUser
 		LastLoginAt: now,
 		IsAdmin:     false,
 	}
+	if err := newUser.assignIDIfMissing(); err != nil {
+		return err
+	}
 	if err := tx.Create(&newUser).Error; err != nil {
 		return err
 	}
@@ -182,6 +199,9 @@ func (u *User) RegisterUser(ctx context.Context, tx *gorm.DB) error {
 		}
 	}
 
+	if err := u.assignIDIfMissing(); err != nil {
+		return err
+	}
 	if err := tx.Create(u).Error; err != nil {
 		return err
 	}