Add standalone desktop workflow

internal/api/handlers_system.go

@@ -0,0 +1,16 @@
+package api
+
+import (
+	"net/http"
+
+	"jukebox_maker/internal/dialog"
+)
+
+func (s *Server) handlePickFolder(w http.ResponseWriter, r *http.Request) {
+	path, err := dialog.PickFolder()
+	if err != nil {
+		jsonErr(w, http.StatusUnprocessableEntity, err.Error())
+		return
+	}
+	jsonOK(w, map[string]string{"path": path})
+}