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/handler/router_test.go

@@ -3,8 +3,7 @@ package handler
 import (
 	"context"
 	"errors"
-	"io"
-	"log/slog"
+	"go.uber.org/zap"
 	"net/http"
 	"net/http/httptest"
 	"strings"
@@ -16,7 +15,7 @@ import (
 func TestLivenessAndReadinessAreIndependent(t *testing.T) {
 	secretError := "password=secret-internal-detail"
 	health := service.NewHealthService(nil, func(context.Context) error { return errors.New(secretError) })
-	router := NewRouter(health, slog.New(slog.NewTextHandler(io.Discard, nil)), IdentityOptions{})
+	router := NewRouter(health, zap.NewNop(), IdentityOptions{})
 	for _, tc := range []struct {
 		path   string
 		status int
@@ -37,7 +36,7 @@ func TestLivenessAndReadinessAreIndependent(t *testing.T) {
 
 func TestReadyWhenBothDependenciesRespond(t *testing.T) {
 	probe := func(context.Context) error { return nil }
-	router := NewRouter(service.NewHealthService(probe, probe), slog.New(slog.NewTextHandler(io.Discard, nil)), IdentityOptions{})
+	router := NewRouter(service.NewHealthService(probe, probe), zap.NewNop(), IdentityOptions{})
 	rec := httptest.NewRecorder()
 	router.ServeHTTP(rec, httptest.NewRequest(http.MethodGet, "/readyz", nil))
 	if rec.Code != http.StatusOK {
@@ -47,7 +46,7 @@ func TestReadyWhenBothDependenciesRespond(t *testing.T) {
 
 func TestEmbeddedConsoleAndAPIBoundary(t *testing.T) {
 	probe := func(context.Context) error { return nil }
-	router := NewRouter(service.NewHealthService(probe, probe), slog.New(slog.NewTextHandler(io.Discard, nil)), IdentityOptions{})
+	router := NewRouter(service.NewHealthService(probe, probe), zap.NewNop(), IdentityOptions{})
 	for _, path := range []string{"/", "/research/candidates"} {
 		rec := httptest.NewRecorder()
 		router.ServeHTTP(rec, httptest.NewRequest(http.MethodGet, path, nil))