feat: funciones Wails — scaffold, CRUD bindings, build, eventos y streaming

Funciones Go para crear apps Wails: scaffold estructura, bind CRUD genérico,
build multiplataforma, emit eventos y stream de datos al frontend.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

functions/infra/wails_emit_event.go

@@ -0,0 +1,40 @@
+//go:build ignore
+// NOTE: requires wails dependency in target project — use this file by copying into a Wails project
+
+package infra
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"time"
+
+	"github.com/wailsapp/wails/v2/pkg/runtime"
+)
+
+// WailsEventPayload es un envelope para eventos tipados.
+type WailsEventPayload struct {
+	Type      string      `json:"type"`
+	Data      interface{} `json:"data"`
+	Timestamp time.Time   `json:"timestamp"`
+}
+
+// WailsEmitEvent emite un evento tipado al frontend.
+func WailsEmitEvent(ctx context.Context, eventName string, data interface{}) {
+	payload := WailsEventPayload{
+		Type:      eventName,
+		Data:      data,
+		Timestamp: time.Now(),
+	}
+	runtime.EventsEmit(ctx, eventName, payload)
+}
+
+// WailsEmitJSON emite datos como JSON string al frontend.
+func WailsEmitJSON(ctx context.Context, eventName string, data interface{}) error {
+	b, err := json.Marshal(data)
+	if err != nil {
+		return fmt.Errorf("marshaling event data: %w", err)
+	}
+	runtime.EventsEmit(ctx, eventName, string(b))
+	return nil
+}