Make terminal log stream live-only by default

platform/api/log_events_handlers.go

@@ -15,13 +15,14 @@ import (
 )
 
 const (
-	defaultLogEventHistoryLimit = 100
+	defaultLogEventHistoryLimit = 0
 	maxLogEventHistoryLimit     = 10000
 	logEventHeartbeatInterval   = 15 * time.Second
 	managedLogSessionIDPrefix   = "log-session:"
 )
 
-// serverLogEvents streams platform-accepted server log history and live append events for the terminal drawer.
+// serverLogEvents streams platform-accepted live append events for the terminal drawer.
+// Callers can opt into a bounded current-session replay with historyLimit.
 func (h *coreHandlers) serverLogEvents(w http.ResponseWriter, r *http.Request) {
 	if r.Method != http.MethodGet {
 		writeMethodNotAllowed(w, http.MethodGet)
@@ -221,6 +222,9 @@ func (h *coreHandlers) writeCurrentLogSession(w http.ResponseWriter, serverInsta
 		return nil, err
 	}
 	for _, stream := range active.streams {
+		if historyLimit == 0 {
+			emittedThrough[stream.ID] = stream.LatestSeq
+		}
 		if err := writeSSEJSON(w, "stream", "", dto.LogStreamFromDomain(stream)); err != nil {
 			return nil, err
 		}