feat(time-tracking): let clients subscribe to timer events

pkg/websocket/connection.go

@@ -264,6 +264,9 @@ func (c *Connection) WriteLoop(ctx context.Context, cancel context.CancelFunc) {
 // validEvents is the set of event names clients are allowed to subscribe to.
 var validEvents = map[string]bool{
 	"notification.created": true,
+	"timer.created":        true,
+	"timer.updated":        true,
+	"timer.deleted":        true,
 }
 
 func isValidEvent(event string) bool {

pkg/websocket/connection_test.go

@@ -80,6 +80,20 @@ func TestConnectionRejectsInvalidEvent(t *testing.T) {
 	assert.False(t, conn.IsSubscribed("notifications"))
 }
 
+func TestConnectionAllowsTimerEvents(t *testing.T) {
+	conn := &Connection{
+		userID:        1,
+		authenticated: true,
+		subscriptions: make(map[string]bool),
+		send:          make(chan OutgoingMessage, 16),
+	}
+
+	for _, event := range []string{"timer.created", "timer.updated"} {
+		conn.handleMessage(context.Background(), IncomingMessage{Action: ActionSubscribe, Event: event})
+		assert.True(t, conn.IsSubscribed(event), "client must be able to subscribe to %s", event)
+	}
+}
+
 func TestConnectionRejectsActionsBeforeAuth(t *testing.T) {
 	conn := &Connection{
 		userID:        0, // not authenticated