Beta server and role come from the dashboard

The owner sets them on the admin page; the bot polls the shared beta_settings
row (30s) and moves the beta commands if the server changes. BETA_* env vars
are gone.

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>

internal/config/config.go

@@ -7,16 +7,10 @@ import (
 	"github.com/joho/godotenv"
 )
 
-// DefaultBetaGuildID is the server that beta features are tried in, unless
-// BETA_GUILD_ID says otherwise.
-const DefaultBetaGuildID = "1170934850157547600"
-
 type Config struct {
 	BotToken       string
 	AppID          string
 	GuildID        string
-	BetaGuildID    string // BETA_GUILD_ID: where beta features exist
-	BetaRoleID     string // BETA_ROLE_ID: the Beta Tester role; empty keeps beta features locked for everyone
 	DBHost         string
 	LavalinkHost   string
 	LavalinkPass   string
@@ -39,12 +33,6 @@ func LoadConfig() (*Config, error) {
 
 	guildID := os.Getenv("GUILD_ID")
 
-	betaGuildID := os.Getenv("BETA_GUILD_ID")
-	if betaGuildID == "" {
-		betaGuildID = DefaultBetaGuildID
-	}
-	betaRoleID := os.Getenv("BETA_ROLE_ID")
-
 	dbHost := os.Getenv("DB_HOST")
 	if dbHost == "" {
 		return nil, fmt.Errorf("DB_HOST is not set")
@@ -62,8 +50,6 @@ func LoadConfig() (*Config, error) {
 		BotToken:       token,
 		AppID:          appID,
 		GuildID:        guildID,
-		BetaGuildID:    betaGuildID,
-		BetaRoleID:     betaRoleID,
 		DBHost:         dbHost,
 		LavalinkHost:   lavalinkHost,
 		LavalinkPass:   lavalinkPass,