feat(server): register command menu on startup

cmd/server/command_menu.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"time"
+
+	"github.com/go-telegram/bot"
+	"github.com/go-telegram/bot/models"
+
+	"github.com/tiennm99/miti99bot/internal/modules"
+)
+
+const commandMenuTimeout = 8 * time.Second
+
+// botCommandMenu builds the Telegram command menu from the loaded public
+// commands. It intentionally follows registry module order so MODULES controls
+// both enabled commands and their menu grouping.
+func botCommandMenu(reg *modules.Registry) []models.BotCommand {
+	if reg == nil {
+		return nil
+	}
+	var out []models.BotCommand
+	for _, mod := range reg.Modules {
+		for _, cmd := range mod.Commands {
+			if cmd.Visibility != modules.VisibilityPublic {
+				continue
+			}
+			out = append(out, models.BotCommand{
+				Command:     cmd.Name,
+				Description: cmd.Description,
+			})
+		}
+	}
+	return out
+}
+
+// registerCommandMenu publishes the menu to Telegram. It is best-effort at
+// startup: callers should log failures and keep the bot running.
+func registerCommandMenu(ctx context.Context, b *bot.Bot, reg *modules.Registry) (int, error) {
+	cmds := botCommandMenu(reg)
+	menuCtx, cancel := context.WithTimeout(ctx, commandMenuTimeout)
+	defer cancel()
+
+	ok, err := b.SetMyCommands(menuCtx, &bot.SetMyCommandsParams{Commands: cmds})
+	if err != nil {
+		return len(cmds), err
+	}
+	if !ok {
+		return len(cmds), errors.New("telegram setMyCommands returned false")
+	}
+	return len(cmds), nil
+}