feat: 脚本创作+发布+市场体系

- 数据模型新增: title(必填), description(可选), status(draft/published)
- 新增 API: POST /scripts/:id/publish, GET /api/market (搜索+分页+runtime过滤)
- 前端首页重构: 选语言 → CodeMirror 编辑器(8种语言语法高亮) → 标题/描述 → 草稿/发布
- 新增 /market 页面: 浏览已发布脚本, 搜索+过滤+分页
- 详情页新增: 发布按钮(草稿→市场), title/description 展示
- Shell 类运行时显示 source 命令(继承环境变量)
- backend GetSourceCommand 支持 bash/zsh/sh/fish 四种 shell 格式

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backend/internal/service/script.go

@@ -14,6 +14,7 @@ import (
 var (
 	ErrInvalidRuntime = errors.New("invalid runtime")
 	ErrNotFound       = errors.New("script not found or expired")
+	ErrAlreadyPublished = errors.New("script already published")
 )
 
 type ScriptService struct {
@@ -25,15 +26,19 @@ func NewScriptService(db *gorm.DB) *ScriptService {
 }
 
 type CreateInput struct {
-	Content   string
-	Runtime   string
-	ExpiresIn string
+	Title       string
+	Description string
+	Content     string
+	Runtime     string
+	ExpiresIn   string
+	Publish     bool
 }
 
 type CreateResult struct {
 	Script     model.Script
 	AdminToken string
 	Command    string
+	SourceCmd  string
 	RawURL     string
 }
 
@@ -66,13 +71,25 @@ func (s *ScriptService) Create(input CreateInput, scheme, host string) (*CreateR
 		return nil, err
 	}
 
+	status := "draft"
+	var publishedAt *time.Time
+	if input.Publish {
+		status = "published"
+		now := time.Now()
+		publishedAt = &now
+	}
+
 	script := model.Script{
-		ID:         id,
-		Content:    input.Content,
-		Runtime:    input.Runtime,
-		AdminToken: adminToken,
-		ExpiresAt:  time.Now().Add(d),
-		CreatedAt:  time.Now(),
+		ID:          id,
+		Title:       input.Title,
+		Description: input.Description,
+		Content:     input.Content,
+		Runtime:     input.Runtime,
+		AdminToken:  adminToken,
+		Status:      status,
+		ExpiresAt:   time.Now().Add(d),
+		CreatedAt:   time.Now(),
+		PublishedAt: publishedAt,
 	}
 
 	if err := s.db.Create(&script).Error; err != nil {
@@ -81,11 +98,13 @@ func (s *ScriptService) Create(input CreateInput, scheme, host string) (*CreateR
 
 	rawURL := scheme + "://" + host + "/raw/" + id
 	command := "curl " + rawURL + " | " + input.Runtime
+	sourceCmd := config.GetSourceCommand(rawURL, input.Runtime)
 
 	return &CreateResult{
 		Script:     script,
 		AdminToken: adminToken,
 		Command:    command,
+		SourceCmd:  sourceCmd,
 		RawURL:     rawURL,
 	}, nil
 }
@@ -99,6 +118,79 @@ func (s *ScriptService) GetByID(id string) (*model.Script, error) {
 	return &script, err
 }
 
+func (s *ScriptService) Publish(id, token string) (*model.Script, error) {
+	var script model.Script
+	err := s.db.Where("id = ? AND admin_token = ? AND expires_at > ?", id, token, time.Now()).First(&script).Error
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		return nil, ErrNotFound
+	}
+	if err != nil {
+		return nil, err
+	}
+	if script.Status == "published" {
+		return nil, ErrAlreadyPublished
+	}
+
+	now := time.Now()
+	script.Status = "published"
+	script.PublishedAt = &now
+
+	if err := s.db.Save(&script).Error; err != nil {
+		return nil, err
+	}
+	return &script, nil
+}
+
+type MarketQuery struct {
+	Page    int
+	PerPage int
+	Runtime string
+	Search  string
+}
+
+type MarketResult struct {
+	Items []model.Script
+	Total int64
+	Page  int
+	PerPage int
+}
+
+func (s *ScriptService) ListMarket(q MarketQuery) (*MarketResult, error) {
+	if q.Page < 1 {
+		q.Page = 1
+	}
+	if q.PerPage < 1 || q.PerPage > 50 {
+		q.PerPage = 20
+	}
+
+	query := s.db.Model(&model.Script{}).
+		Where("status = ? AND expires_at > ?", "published", time.Now())
+
+	if q.Runtime != "" && config.IsValidRuntime(q.Runtime) {
+		query = query.Where("runtime = ?", q.Runtime)
+	}
+	if q.Search != "" {
+		search := "%" + q.Search + "%"
+		query = query.Where("title LIKE ? OR description LIKE ?", search, search)
+	}
+
+	var total int64
+	query.Count(&total)
+
+	var scripts []model.Script
+	err := query.Order("published_at DESC").
+		Offset((q.Page - 1) * q.PerPage).
+		Limit(q.PerPage).
+		Find(&scripts).Error
+
+	return &MarketResult{
+		Items:   scripts,
+		Total:   total,
+		Page:    q.Page,
+		PerPage: q.PerPage,
+	}, err
+}
+
 func (s *ScriptService) Delete(id, token string) error {
 	result := s.db.Where("id = ? AND admin_token = ?", id, token).Delete(&model.Script{})
 	if result.RowsAffected == 0 {
@@ -110,4 +202,4 @@ func (s *ScriptService) Delete(id, token string) error {
 func (s *ScriptService) CleanupExpired() (int64, error) {
 	result := s.db.Where("expires_at <= ?", time.Now()).Delete(&model.Script{})
 	return result.RowsAffected, result.Error
-}
+}