fix(build): resolve three failing tests across integration and tui modules

SessionOrchestratorIntegrationTest: wire approvalRepository into
OrchestratorRepositories constructor which gained the field in the kernel
refactor. TambouiKeyMapperTest: correct ctrl-h to alt-h — the mapper has
always placed ToggleApprovalOverlay under the Alt branch, not Ctrl.
SessionOrchestrator.emit: replace substring(0,7) with take(7) to avoid
StringIndexOutOfBoundsException when session IDs are shorter than 7 chars.

core/kernel/src/main/kotlin/com/correx/core/kernel/orchestration/SessionOrchestrator.kt

@@ -646,7 +646,7 @@ abstract class SessionOrchestrator(
     // --- event emission ---
 
     internal suspend fun emit(sessionId: SessionId, payload: EventPayload) {
-        log.debug("[session {}] emitting event, payload: {}", sessionId.value.substring(0, 7), payload)
+        log.debug("[session {}] emitting event, payload: {}", sessionId.value.take(7), payload)
         eventStore.append(
             NewEvent(
                 metadata = EventMetadata(