refactor(structure): group platform, infra, and shared packages

Move process wiring, technical adapters, and cross-cutting contracts out of flat internal/ packages so new code has a clear home without changing business layout.

internal/platform/bootstrap/bootstrap_test.go

@@ -0,0 +1,52 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package bootstrap
+
+import (
+	"context"
+	"testing"
+
+	admin_push "github.com/Rain-kl/Wavelet/internal/apps/admin/push"
+	"github.com/Rain-kl/Wavelet/internal/model"
+	"github.com/Rain-kl/Wavelet/internal/testhelper"
+)
+
+func TestInitSyncsPushEventsOnce(t *testing.T) {
+	ResetInitRuntimeOnceForTest()
+	t.Cleanup(ResetInitRuntimeOnceForTest)
+
+	dbConn, _, cleanup := testhelper.SetupTestEnvironment(t)
+	defer cleanup()
+
+	if err := dbConn.AutoMigrate(&model.PushEvent{}); err != nil {
+		t.Fatalf("auto migrate push events failed: %v", err)
+	}
+
+	RegisterPushDomainEvents()
+
+	wantCount := len(admin_push.BuiltInEvents)
+	if wantCount < 1 {
+		t.Fatalf("built-in push events = %d, want at least 1", wantCount)
+	}
+
+	ctx := context.Background()
+	Init(ctx, Options{API: true})
+	Init(ctx, Options{}) // second Init must not duplicate events (initRuntimeOnce)
+
+	var count int64
+	if err := dbConn.Model(&model.PushEvent{}).Count(&count).Error; err != nil {
+		t.Fatalf("count push events failed: %v", err)
+	}
+	if count != int64(wantCount) {
+		t.Fatalf("push event count = %d, want %d", count, wantCount)
+	}
+
+	var adminLogin model.PushEvent
+	if err := dbConn.Where("event_key = ?", "admin_login").First(&adminLogin).Error; err != nil {
+		t.Fatalf("admin_login event not found after Init: %v", err)
+	}
+	if adminLogin.Name != "管理员登录" {
+		t.Fatalf("admin_login name = %q, want %q", adminLogin.Name, "管理员登录")
+	}
+}