Added a MediaUploadService option to the configuration loader and documented it in the README so operators can pick the attachment backend (defaulting to Litterbox) straight from .env.

Refactored the Discord bridge to build a media service during initialization, route attachment uploads through it, and dynamically label the status embeds and error diagnostics based on the selected provider while preserving the existing progress messaging flow.

Introduced a new media package that defines the uploader interface and ships a Litterbox implementation responsible for fetching Discord attachments and posting them to Catbox while reporting HTTP status codes back to the bridge.

config/config.go

@@ -10,16 +10,17 @@ import (
 )
 
 type Config struct {
-	DiscordBotToken   string
-	DiscordChannelID  string
-	DiscordGuildID    string
-	DiscordWebhookURL string
-	SneedchatRoomID   int
-	BridgeUsername    string
-	BridgePassword    string
-	BridgeUserID      int
-	DiscordPingUserID string
-	Debug             bool
+	DiscordBotToken    string
+	DiscordChannelID   string
+	DiscordGuildID     string
+	DiscordWebhookURL  string
+	SneedchatRoomID    int
+	MediaUploadService string
+	BridgeUsername     string
+	BridgePassword     string
+	BridgeUserID       int
+	DiscordPingUserID  string
+	Debug              bool
 }
 
 func Load(envFile string) (*Config, error) {
@@ -27,13 +28,17 @@ func Load(envFile string) (*Config, error) {
 		log.Printf("Warning: error loading %s: %v", envFile, err)
 	}
 	cfg := &Config{
-		DiscordBotToken:   os.Getenv("DISCORD_BOT_TOKEN"),
-		DiscordChannelID:  os.Getenv("DISCORD_CHANNEL_ID"),
-		DiscordGuildID:    os.Getenv("DISCORD_GUILD_ID"),
-		DiscordWebhookURL: os.Getenv("DISCORD_WEBHOOK_URL"),
-		BridgeUsername:    os.Getenv("BRIDGE_USERNAME"),
-		BridgePassword:    os.Getenv("BRIDGE_PASSWORD"),
-		DiscordPingUserID: os.Getenv("DISCORD_PING_USER_ID"),
+		DiscordBotToken:    os.Getenv("DISCORD_BOT_TOKEN"),
+		DiscordChannelID:   os.Getenv("DISCORD_CHANNEL_ID"),
+		DiscordGuildID:     os.Getenv("DISCORD_GUILD_ID"),
+		DiscordWebhookURL:  os.Getenv("DISCORD_WEBHOOK_URL"),
+		MediaUploadService: os.Getenv("MEDIA_UPLOAD_SERVICE"),
+		BridgeUsername:     os.Getenv("BRIDGE_USERNAME"),
+		BridgePassword:     os.Getenv("BRIDGE_PASSWORD"),
+		DiscordPingUserID:  os.Getenv("DISCORD_PING_USER_ID"),
+	}
+	if cfg.MediaUploadService == "" {
+		cfg.MediaUploadService = "litterbox"
 	}
 	roomID, err := strconv.Atoi(os.Getenv("SNEEDCHAT_ROOM_ID"))
 	if err != nil {