fix: address P0-4 chat zombie, P0-5 double SessionStarted, P0-6 steering wrong content

core/router/src/main/kotlin/com/correx/core/router/RouterFacade.kt

@@ -1,10 +1,6 @@
 package com.correx.core.router
 
-import com.correx.core.events.events.EventMetadata
-import com.correx.core.events.events.NewEvent
-import com.correx.core.events.events.SteeringNoteAddedEvent
 import com.correx.core.events.stores.EventStore
-import com.correx.core.events.types.EventId
 import com.correx.core.events.types.InferenceRequestId
 import com.correx.core.events.types.SessionId
 import com.correx.core.events.types.StageId
@@ -71,24 +67,11 @@ class DefaultRouterFacade(
 
         history.add(RouterTurn(role = TurnRole.ROUTER, content = content, timestamp = Clock.System.now()))
 
-        if (mode == ChatMode.STEERING) {
-            val steeringEvent = SteeringNoteAddedEvent(
-                sessionId = sessionId,
-                content = input,
-                stageId = state.currentStageId,
-            )
-            eventStore.append(NewEvent(
-                metadata = EventMetadata(
-                    eventId = EventId(UUID.randomUUID().toString()),
-                    sessionId = sessionId,
-                    timestamp = Clock.System.now(),
-                    schemaVersion = 1,
-                    causationId = null,
-                    correlationId = null,
-                ),
-                payload = steeringEvent,
-            ))
-        }
+        // NOTE: SteeringNoteAddedEvent emission is deferred to P4-1, which will wire
+        // proper validation (via ValidationPipeline) and consumption by the context builder.
+        // The current SteeringNoteAddedEvent had wrong content (user raw input instead of
+        // LLM-processed steering text) and was emitted without validation (P0-6).
+        // The steeringEmitted flag below still informs the TUI that steering mode was used.
 
         return RouterResponse(content = content, steeringEmitted = (mode == ChatMode.STEERING))
     }