feat(server): intent input channel — StartSession.input seeds decision journal

core/journal/src/main/kotlin/com/correx/core/journal/DefaultDecisionJournalReducer.kt

@@ -2,6 +2,7 @@ package com.correx.core.journal
 
 import com.correx.core.events.events.ApprovalDecisionResolvedEvent
 import com.correx.core.events.events.ArtifactValidatedEvent
+import com.correx.core.events.events.InitialIntentEvent
 import com.correx.core.events.events.RetryAttemptedEvent
 import com.correx.core.events.events.StageFailedEvent
 import com.correx.core.events.events.SteeringNoteAddedEvent
@@ -14,6 +15,11 @@ import com.correx.core.journal.model.DecisionRecord
 class DefaultDecisionJournalReducer : DecisionJournalReducer {
     override fun reduce(state: DecisionJournalState, event: StoredEvent): DecisionJournalState {
         val record = when (val p = event.payload) {
+            is InitialIntentEvent -> DecisionRecord(
+                sequence = event.sessionSequence,
+                kind = DecisionKind.INTENT,
+                summary = "Goal: ${p.intent}",
+            )
             is SteeringNoteAddedEvent -> DecisionRecord(
                 sequence = event.sessionSequence,
                 kind = DecisionKind.STEERING,

core/journal/src/main/kotlin/com/correx/core/journal/model/DecisionRecord.kt

@@ -2,7 +2,7 @@ package com.correx.core.journal.model
 
 import kotlinx.serialization.Serializable
 
-enum class DecisionKind { STEERING, APPROVAL, TRANSITION, RETRY, FAILURE, ARTIFACT }
+enum class DecisionKind { INTENT, STEERING, APPROVAL, TRANSITION, RETRY, FAILURE, ARTIFACT }
 
 /**
  * One distilled decision. [sequence] is the source event's sessionSequence, used for