🧹 make logger time format configurable

- Add SetTimeFormat to pkg/logger/logger.go
- Add LoggerConfig to pkg/config/config.go
- Set default TimeFormat in pkg/config/defaults.go
- Apply configuration in cmd/picoclaw/internal/gateway/helpers.go
- Add TestSetTimeFormat to pkg/logger/logger_test.go

Co-authored-by: hobbyistlabs-coder <267281733+hobbyistlabs-coder@users.noreply.github.com>

cmd/picoclaw/internal/gateway/helpers.go

@@ -50,6 +50,10 @@ func gatewayCmd(debug bool) error {
 		return fmt.Errorf("error loading config: %w", err)
 	}
 
+	if cfg.Logger.TimeFormat != "" {
+		logger.SetTimeFormat(cfg.Logger.TimeFormat)
+	}
+
 	provider, modelID, err := providers.CreateProvider(cfg)
 	if err != nil {
 		return fmt.Errorf("error creating provider: %w", err)

pkg/config/config.go

@@ -81,6 +81,7 @@ type Config struct {
 	Channels  ChannelsConfig  `json:"channels"`
 	Providers ProvidersConfig `json:"providers,omitempty"`
 	ModelList []ModelConfig   `json:"model_list"` // New model-centric provider configuration
+	Logger    LoggerConfig    `json:"logger"`
 	Gateway   GatewayConfig   `json:"gateway"`
 	Tools     ToolsConfig     `json:"tools"`
 	Heartbeat HeartbeatConfig `json:"heartbeat"`
@@ -561,6 +562,10 @@ func (c *ModelConfig) Validate() error {
 	return nil
 }
 
+type LoggerConfig struct {
+	TimeFormat string `json:"time_format" env:"PICOCLAW_LOGGER_TIME_FORMAT"`
+}
+
 type GatewayConfig struct {
 	Host string `json:"host" env:"PICOCLAW_GATEWAY_HOST"`
 	Port int    `json:"port" env:"PICOCLAW_GATEWAY_PORT"`

pkg/config/defaults.go

@@ -342,6 +342,9 @@ func DefaultConfig() *Config {
 				APIKey:    "",
 			},
 		},
+		Logger: LoggerConfig{
+			TimeFormat: "15:04:05",
+		},
 		Gateway: GatewayConfig{
 			Host: "127.0.0.1",
 			Port: 18790,

pkg/logger/logger.go

@@ -30,9 +30,10 @@ var (
 		FATAL: "FATAL",
 	}
 
-	currentLevel = INFO
-	logger       zerolog.Logger
-	fileLogger   zerolog.Logger
+	currentLevel      = INFO
+	currentTimeFormat = "15:04:05"
+	logger            zerolog.Logger
+	fileLogger        zerolog.Logger
 	logFile      *os.File
 	once         sync.Once
 	mu           sync.RWMutex
@@ -44,7 +45,7 @@ func init() {
 
 		consoleWriter := zerolog.ConsoleWriter{
 			Out:        os.Stdout,
-			TimeFormat: "15:04:05", // TODO: make it configurable???
+			TimeFormat: currentTimeFormat,
 		}
 
 		logger = zerolog.New(consoleWriter).With().Timestamp().Logger()
@@ -52,6 +53,19 @@ func init() {
 	})
 }
 
+func SetTimeFormat(format string) {
+	mu.Lock()
+	defer mu.Unlock()
+	currentTimeFormat = format
+
+	consoleWriter := zerolog.ConsoleWriter{
+		Out:        os.Stdout,
+		TimeFormat: currentTimeFormat,
+	}
+
+	logger = zerolog.New(consoleWriter).With().Timestamp().Logger()
+}
+
 func SetLevel(level LogLevel) {
 	mu.Lock()
 	defer mu.Unlock()

pkg/logger/logger_test.go

@@ -137,3 +137,15 @@ func TestLoggerHelperFunctions(t *testing.T) {
 	DebugC("test", "Debug with component")
 	WarnF("Warning with fields", map[string]any{"key": "value"})
 }
+
+func TestSetTimeFormat(t *testing.T) {
+	// This test just ensures that calling SetTimeFormat doesn't panic
+	// and updates the internal state. Since the logger is global and
+	// writes to stdout, we don't easily capture the output here without
+	// more complex mocking.
+	SetTimeFormat("2006-01-02 15:04:05")
+	Info("Testing time format change")
+
+	// Restore default
+	SetTimeFormat("15:04:05")
+}