fix: remove tenant dependency from member login

internal/config/config.go

@@ -67,7 +67,6 @@ type AuthConfig struct {
 	APIKeys            []string `json:"api_keys"`
 	SessionKeyPattern  string   `json:"session_key_pattern"`
 	SessionTTLSeconds  int      `json:"session_ttl_seconds"`
-	DefaultTenantID    int64    `json:"default_tenant_id"`
 	DataEncryptionKey  string   `json:"data_encryption_key"`
 	LookupHMACKey      string   `json:"lookup_hmac_key"`
 	FinanceMasterKey   string   `json:"finance_master_key"`
@@ -106,7 +105,6 @@ func defaultConfig() *Config {
 		Auth: AuthConfig{
 			SessionKeyPattern: "olons_server:session:token:%s",
 			SessionTTLSeconds: 14 * 24 * 60 * 60,
-			DefaultTenantID:   0,
 			RequiredAPIKey:    true,
 		},
 		Upload: UploadConfig{Driver: "local", Dir: "storage/uploads", PublicPath: "/uploads", Region: "us-east-1"},
@@ -133,7 +131,6 @@ func applyEnv(cfg *Config) {
 	setInt(&cfg.Redis.DB, "OLONS_SERVER_REDIS_DB")
 	setString(&cfg.Auth.SessionKeyPattern, "OLONS_SERVER_SESSION_KEY_PATTERN")
 	setInt(&cfg.Auth.SessionTTLSeconds, "OLONS_SERVER_SESSION_TTL_SECONDS")
-	setInt64(&cfg.Auth.DefaultTenantID, "OLONS_SERVER_DEFAULT_TENANT_ID")
 	setString(&cfg.Auth.DataEncryptionKey, "OLONS_SERVER_DATA_ENCRYPTION_KEY")
 	setString(&cfg.Auth.LookupHMACKey, "OLONS_SERVER_LOOKUP_HMAC_KEY")
 	setString(&cfg.Auth.FinanceMasterKey, "OLONS_SERVER_FINANCE_MASTER_KEY")
@@ -177,9 +174,6 @@ func (c *Config) validate() error {
 	if c.Auth.SessionTTLSeconds <= 0 {
 		c.Auth.SessionTTLSeconds = 14 * 24 * 60 * 60
 	}
-	if c.Auth.DefaultTenantID < 0 {
-		return errors.New("default tenant id must not be negative")
-	}
 	if err := ValidateUpload(c.Upload); err != nil {
 		return err
 	}
@@ -261,14 +255,6 @@ func setInt(target *int, key string) {
 	}
 }
 
-func setInt64(target *int64, key string) {
-	if value := strings.TrimSpace(os.Getenv(key)); value != "" {
-		if parsed, err := strconv.ParseInt(value, 10, 64); err == nil {
-			*target = parsed
-		}
-	}
-}
-
 func setBool(target *bool, key string) {
 	switch strings.ToLower(strings.TrimSpace(os.Getenv(key))) {
 	case "1", "true", "yes", "on":

internal/config/config_test.go

@@ -7,9 +7,6 @@ func TestDefaultConfigUsesOlonsAdmin(t *testing.T) {
 	if err := cfg.validate(); err != nil {
 		t.Fatal(err)
 	}
-	if cfg.Auth.DefaultTenantID != 0 {
-		t.Fatalf("DefaultTenantID = %d", cfg.Auth.DefaultTenantID)
-	}
 }
 
 func TestConfigRejectsOtherDatabase(t *testing.T) {