Fix N+1 API calls in member listing commands

Replace per-member GetUser calls with a single batch GetUsersByIds call
in team members, channel members, and user list commands. This reduces
HTTP requests from O(members) to O(1).

Also remove "similar to gh/glab" references from CLI description and
README.

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

Author: ziyan

README.md

@@ -1,6 +1,6 @@
 # mm
 
-A full-featured command-line client for [Mattermost](https://mattermost.com), similar to [`gh`](https://github.com/cli/cli) for GitHub or [`glab`](https://gitlab.com/gitlab-org/cli) for GitLab.
+A full-featured command-line client for [Mattermost](https://mattermost.com).
 
 `mm` lets you interact with your Mattermost server entirely from the terminal: send messages, manage channels, stream real-time notifications, upload files, schedule posts, and much more.
 

internal/commands/channel.go

@@ -299,10 +299,23 @@ func channelMembersRun(command *cobra.Command, args []string) error {
 		return nil
 	}
 
+	userIds := make([]string, len(members))
+	for index := range members {
+		userIds[index] = members[index].UserId
+	}
+	users, _, err := apiClient.GetUsersByIds(ctx, userIds)
+	if err != nil {
+		return fmt.Errorf("fetching users: %w", err)
+	}
+	userById := make(map[string]*model.User)
+	for _, user := range users {
+		userById[user.Id] = user
+	}
+
 	var rows [][]string
 	for _, member := range members {
-		user, _, err := apiClient.GetUser(ctx, member.UserId, "")
-		if err != nil {
+		user, ok := userById[member.UserId]
+		if !ok {
 			continue
 		}
 		rows = append(rows, []string{user.Username, user.GetFullName(), member.Roles})

internal/commands/root.go

@@ -12,7 +12,7 @@ import (
 var rootCommand = &cobra.Command{
 	Use:     "mm",
 	Short:   "Mattermost CLI client",
-	Long:    "A command-line client for Mattermost, similar to gh for GitHub.",
+	Long:    "A full-featured command-line client for Mattermost.",
 	Version: version.Version(),
 	PersistentPreRun: func(command *cobra.Command, args []string) {
 		jsonFlag, _ := command.Flags().GetBool("json")

internal/commands/team.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 
+	"github.com/mattermost/mattermost/server/public/model"
 	"github.com/spf13/cobra"
 	"github.com/ziyan/mm/internal/client"
 	"github.com/ziyan/mm/internal/config"
@@ -178,10 +179,23 @@ func teamMembersRun(command *cobra.Command, args []string) error {
 		return nil
 	}
 
+	userIds := make([]string, len(members))
+	for index, member := range members {
+		userIds[index] = member.UserId
+	}
+	users, _, err := apiClient.GetUsersByIds(ctx, userIds)
+	if err != nil {
+		return fmt.Errorf("fetching users: %w", err)
+	}
+	userById := make(map[string]*model.User)
+	for _, user := range users {
+		userById[user.Id] = user
+	}
+
 	var rows [][]string
 	for _, member := range members {
-		user, _, err := apiClient.GetUser(ctx, member.UserId, "")
-		if err != nil {
+		user, ok := userById[member.UserId]
+		if !ok {
 			continue
 		}
 		roles := member.Roles

internal/commands/user.go

@@ -228,11 +228,13 @@ func userListRun(command *cobra.Command, args []string) error {
 		if err != nil {
 			return fmt.Errorf("listing team members: %w", err)
 		}
-		for _, member := range members {
-			user, _, err := apiClient.GetUser(ctx, member.UserId, "")
-			if err == nil {
-				users = append(users, user)
-			}
+		userIds := make([]string, len(members))
+		for index, member := range members {
+			userIds[index] = member.UserId
+		}
+		users, _, err = apiClient.GetUsersByIds(ctx, userIds)
+		if err != nil {
+			return fmt.Errorf("fetching users: %w", err)
 		}
 	} else {
 		var err error