feat: 完成模拟交易闭环、App 与 A 股行情接入

统一单入口 Go 工程与前端依赖目录，增加后台供应商配置、候选审核、计划预算、成交冲正、持仓复盘和站内通知。接入策略版本、Python 回测、可配置 A 股公开行情及 zap 文件轮转日志，补充迁移、契约与验证。

internal/service/strategy.go

@@ -0,0 +1,102 @@
+package service
+
+import (
+	"context"
+	"git.sundynix.cn/Blizzard/Veyra/internal/apperror"
+	"git.sundynix.cn/Blizzard/Veyra/internal/model"
+	"github.com/google/uuid"
+	"regexp"
+	"strings"
+	"unicode/utf8"
+)
+
+type StrategyRepository interface {
+	List(context.Context) ([]model.Strategy, error)
+	Detail(context.Context, string) (model.StrategyDetail, error)
+	Save(context.Context, string, StrategyInput, string, string) (model.StrategyDetail, error)
+	Deploy(context.Context, string, string, string, int64, string, string, string) (model.StrategyDetail, error)
+}
+type StrategyService struct {
+	repo        StrategyRepository
+	development bool
+}
+
+func NewStrategyService(repo StrategyRepository, development bool) *StrategyService {
+	return &StrategyService{repo, development}
+}
+func (s *StrategyService) authorize(actor model.User) error {
+	if actor.Role != "ADMIN" || actor.Status != "ACTIVE" {
+		return apperror.ErrForbidden
+	}
+	if s == nil || s.repo == nil || !s.development {
+		return apperror.ErrUnavailable
+	}
+	return nil
+}
+
+type StrategyInput struct {
+	Code            string                   `json:"code"`
+	Name            string                   `json:"name"`
+	Description     string                   `json:"description"`
+	Parameters      model.StrategyParameters `json:"parameters"`
+	ExpectedVersion int64                    `json:"expected_version"`
+}
+
+var strategyCodePattern = regexp.MustCompile(`^[a-z][a-z0-9_]{2,63}$`)
+
+func (s *StrategyService) List(ctx context.Context, actor model.User) ([]model.Strategy, error) {
+	if err := s.authorize(actor); err != nil {
+		return nil, err
+	}
+	return s.repo.List(ctx)
+}
+func (s *StrategyService) Detail(ctx context.Context, actor model.User, id string) (model.StrategyDetail, error) {
+	if err := s.authorize(actor); err != nil {
+		return model.StrategyDetail{}, err
+	}
+	if _, err := uuid.Parse(id); err != nil {
+		return model.StrategyDetail{}, apperror.ErrInvalidInput
+	}
+	return s.repo.Detail(ctx, id)
+}
+func (s *StrategyService) Save(ctx context.Context, actor model.User, id string, input StrategyInput, requestID string) (model.StrategyDetail, error) {
+	if err := s.authorize(actor); err != nil {
+		return model.StrategyDetail{}, err
+	}
+	if id != "" {
+		if _, err := uuid.Parse(id); err != nil {
+			return model.StrategyDetail{}, apperror.ErrInvalidInput
+		}
+		if input.ExpectedVersion < 1 {
+			return model.StrategyDetail{}, apperror.ErrInvalidInput
+		}
+	}
+	p := input.Parameters
+	input.Code = strings.TrimSpace(input.Code)
+	input.Name = strings.TrimSpace(input.Name)
+	input.Description = strings.TrimSpace(input.Description)
+	if !strategyCodePattern.MatchString(input.Code) || input.Name == "" || utf8.RuneCountInString(input.Name) > 80 || input.Description == "" || utf8.RuneCountInString(input.Description) > 2000 || p.ShortWindow < 2 || p.LongWindow <= p.ShortWindow || p.LongWindow > 200 || p.FeeBPS < 0 || p.FeeBPS > 1000 || p.SlippageBPS < 0 || p.SlippageBPS > 1000 || p.LotSize < 1 || p.LotSize > 10000 {
+		return model.StrategyDetail{}, apperror.ErrInvalidInput
+	}
+	return s.repo.Save(ctx, id, input, actor.ID, requestID)
+}
+func (s *StrategyService) Deploy(ctx context.Context, actor model.User, id, versionID, status string, expected int64, reason, requestID string) (model.StrategyDetail, error) {
+	if err := s.authorize(actor); err != nil {
+		return model.StrategyDetail{}, err
+	}
+	if _, err := uuid.Parse(id); err != nil || expected < 1 {
+		return model.StrategyDetail{}, apperror.ErrInvalidInput
+	}
+	if status != "ACTIVE" && status != "PAUSED" {
+		return model.StrategyDetail{}, apperror.ErrInvalidInput
+	}
+	if status == "ACTIVE" {
+		if _, err := uuid.Parse(versionID); err != nil {
+			return model.StrategyDetail{}, apperror.ErrInvalidInput
+		}
+	}
+	if err := model.ValidateReason(reason); err != nil {
+		return model.StrategyDetail{}, err
+	}
+	return s.repo.Deploy(ctx, id, versionID, status, expected, reason, actor.ID, requestID)
+}