feat: add SESSION_IDLE_TIMEOUT config

- New env var SESSION_IDLE_TIMEOUT (default 24h)
- Parsed as time.Duration in handlers

internal/config/config.go

@@ -23,21 +23,22 @@ type Params struct {
 
 // Config holds all application configuration values.
 type Config struct {
-	DBURL           string
-	Debug           bool
-	MaintenanceMode bool
-	MetricsPassword string
-	MetricsUsername string
-	Port            int
-	SentryDSN       string
-	MaxHistory      int
-	SessionTimeout  int
-	MaxMessageSize  int
-	MOTD            string
-	ServerName      string
-	FederationKey   string
-	params          *Params
-	log             *slog.Logger
+	DBURL              string
+	Debug              bool
+	MaintenanceMode    bool
+	MetricsPassword    string
+	MetricsUsername    string
+	Port               int
+	SentryDSN          string
+	MaxHistory         int
+	SessionTimeout     int
+	MaxMessageSize     int
+	MOTD               string
+	ServerName         string
+	FederationKey      string
+	SessionIdleTimeout string
+	params             *Params
+	log                *slog.Logger
 }
 
 // New creates a new Config by reading from files and environment variables.
@@ -66,6 +67,7 @@ func New(
 	viper.SetDefault("MOTD", "")
 	viper.SetDefault("SERVER_NAME", "")
 	viper.SetDefault("FEDERATION_KEY", "")
+	viper.SetDefault("SESSION_IDLE_TIMEOUT", "24h")
 
 	err := viper.ReadInConfig()
 	if err != nil {
@@ -77,21 +79,22 @@ func New(
 	}
 
 	cfg := &Config{
-		DBURL:           viper.GetString("DBURL"),
-		Debug:           viper.GetBool("DEBUG"),
-		Port:            viper.GetInt("PORT"),
-		SentryDSN:       viper.GetString("SENTRY_DSN"),
-		MaintenanceMode: viper.GetBool("MAINTENANCE_MODE"),
-		MetricsUsername: viper.GetString("METRICS_USERNAME"),
-		MetricsPassword: viper.GetString("METRICS_PASSWORD"),
-		MaxHistory:      viper.GetInt("MAX_HISTORY"),
-		SessionTimeout:  viper.GetInt("SESSION_TIMEOUT"),
-		MaxMessageSize:  viper.GetInt("MAX_MESSAGE_SIZE"),
-		MOTD:            viper.GetString("MOTD"),
-		ServerName:      viper.GetString("SERVER_NAME"),
-		FederationKey:   viper.GetString("FEDERATION_KEY"),
-		log:             log,
-		params:          &params,
+		DBURL:              viper.GetString("DBURL"),
+		Debug:              viper.GetBool("DEBUG"),
+		Port:               viper.GetInt("PORT"),
+		SentryDSN:          viper.GetString("SENTRY_DSN"),
+		MaintenanceMode:    viper.GetBool("MAINTENANCE_MODE"),
+		MetricsUsername:    viper.GetString("METRICS_USERNAME"),
+		MetricsPassword:    viper.GetString("METRICS_PASSWORD"),
+		MaxHistory:         viper.GetInt("MAX_HISTORY"),
+		SessionTimeout:     viper.GetInt("SESSION_TIMEOUT"),
+		MaxMessageSize:     viper.GetInt("MAX_MESSAGE_SIZE"),
+		MOTD:               viper.GetString("MOTD"),
+		ServerName:         viper.GetString("SERVER_NAME"),
+		FederationKey:      viper.GetString("FEDERATION_KEY"),
+		SessionIdleTimeout: viper.GetString("SESSION_IDLE_TIMEOUT"),
+		log:                log,
+		params:             &params,
 	}
 
 	if cfg.Debug {