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/trade_plan.go

@@ -0,0 +1,110 @@
+package service
+
+import (
+	"context"
+	"git.sundynix.cn/Blizzard/Veyra/internal/apperror"
+	"git.sundynix.cn/Blizzard/Veyra/internal/model"
+	"github.com/google/uuid"
+	"regexp"
+	"strconv"
+)
+
+type TradePlanRepository interface {
+	Preview(context.Context, string, string, string, int64, int64, int64) (model.PlanPreview, error)
+	Confirm(context.Context, string, string, string) (model.TradePlan, error)
+	List(context.Context, string) ([]model.TradePlan, error)
+	Cancel(context.Context, string, string, int64, string) (model.TradePlan, error)
+	Budget(context.Context, string, string) (model.PlanBudget, error)
+}
+type TradePlanService struct {
+	repo        TradePlanRepository
+	development bool
+}
+
+func NewTradePlanService(repo TradePlanRepository, development bool) *TradePlanService {
+	return &TradePlanService{repo, development}
+}
+func (s *TradePlanService) authorize(actor model.User) error {
+	if actor.Role != "USER" || actor.Status != "ACTIVE" {
+		return apperror.ErrForbidden
+	}
+	if s == nil || s.repo == nil || !s.development {
+		return apperror.ErrUnavailable
+	}
+	return nil
+}
+
+var quantityPattern = regexp.MustCompile(`^[1-9][0-9]{0,6}$`)
+
+func ParseQuantity(value string) (int64, error) {
+	if !quantityPattern.MatchString(value) {
+		return 0, apperror.ErrInvalidInput
+	}
+	qty, err := strconv.ParseInt(value, 10, 64)
+	if err != nil || qty > 1000000 {
+		return 0, apperror.ErrInvalidInput
+	}
+	return qty, nil
+}
+
+type PlanPreviewInput struct {
+	AccountID                string `json:"account_id"`
+	CandidateRevisionID      string `json:"candidate_revision_id"`
+	ExpectedCandidateVersion int64  `json:"expected_candidate_version"`
+	Quantity                 string `json:"quantity"`
+	FeeBudget                string `json:"fee_budget"`
+}
+
+func (s *TradePlanService) Preview(ctx context.Context, actor model.User, input PlanPreviewInput) (model.PlanPreview, error) {
+	if err := s.authorize(actor); err != nil {
+		return model.PlanPreview{}, err
+	}
+	if _, err := uuid.Parse(input.AccountID); err != nil {
+		return model.PlanPreview{}, apperror.ErrInvalidInput
+	}
+	if _, err := uuid.Parse(input.CandidateRevisionID); err != nil {
+		return model.PlanPreview{}, apperror.ErrInvalidInput
+	}
+	qty, err := ParseQuantity(input.Quantity)
+	if err != nil || qty%100 != 0 || input.ExpectedCandidateVersion < 1 {
+		return model.PlanPreview{}, apperror.ErrInvalidInput
+	}
+	fee, err := model.ParseMoney(input.FeeBudget)
+	if err != nil {
+		return model.PlanPreview{}, err
+	}
+	return s.repo.Preview(ctx, actor.ID, input.AccountID, input.CandidateRevisionID, input.ExpectedCandidateVersion, qty, fee)
+}
+func (s *TradePlanService) Confirm(ctx context.Context, actor model.User, id, requestID string) (model.TradePlan, error) {
+	if err := s.authorize(actor); err != nil {
+		return model.TradePlan{}, err
+	}
+	if _, err := uuid.Parse(id); err != nil {
+		return model.TradePlan{}, apperror.ErrInvalidInput
+	}
+	return s.repo.Confirm(ctx, actor.ID, id, requestID)
+}
+func (s *TradePlanService) List(ctx context.Context, actor model.User) ([]model.TradePlan, error) {
+	if err := s.authorize(actor); err != nil {
+		return nil, err
+	}
+	return s.repo.List(ctx, actor.ID)
+}
+func (s *TradePlanService) Cancel(ctx context.Context, actor model.User, id string, expected int64, requestID string) (model.TradePlan, error) {
+	if err := s.authorize(actor); err != nil {
+		return model.TradePlan{}, err
+	}
+	if _, err := uuid.Parse(id); err != nil || expected < 1 {
+		return model.TradePlan{}, apperror.ErrInvalidInput
+	}
+	return s.repo.Cancel(ctx, actor.ID, id, expected, requestID)
+}
+func (s *TradePlanService) Budget(ctx context.Context, actor model.User, id string) (model.PlanBudget, error) {
+	if err := s.authorize(actor); err != nil {
+		return model.PlanBudget{}, err
+	}
+	if _, err := uuid.Parse(id); err != nil {
+		return model.PlanBudget{}, apperror.ErrInvalidInput
+	}
+	return s.repo.Budget(ctx, actor.ID, id)
+}