fix(ralph-loop): skip idle continuation during background tasks

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

src/hooks/ralph-loop/ralph-loop-event-handler.ts

@@ -25,7 +25,7 @@ type LoopStateController = {
 	setVerificationSessionID: (sessionID: string, verificationSessionID: string) => RalphLoopState | null
 	restartAfterFailedVerification: (sessionID: string, messageCountAtStart?: number) => RalphLoopState | null
 }
-type RalphLoopEventHandlerOptions = { directory: string; apiTimeoutMs: number; getTranscriptPath: (sessionID: string) => string | undefined; checkSessionExists?: RalphLoopOptions["checkSessionExists"]; sessionRecovery: SessionRecovery; loopState: LoopStateController }
+type RalphLoopEventHandlerOptions = { directory: string; apiTimeoutMs: number; getTranscriptPath: (sessionID: string) => string | undefined; checkSessionExists?: RalphLoopOptions["checkSessionExists"]; backgroundManager?: RalphLoopOptions["backgroundManager"]; sessionRecovery: SessionRecovery; loopState: LoopStateController }
 
 export function createRalphLoopEventHandler(
 	ctx: PluginInput,
@@ -59,6 +59,15 @@ export function createRalphLoopEventHandler(
 					return
 				}
 
+				const hasRunningBackgroundTasks = options.backgroundManager
+					? options.backgroundManager.getTasksByParentSession(sessionID).some((task: { status: string }) => task.status === "running")
+					: false
+
+				if (hasRunningBackgroundTasks) {
+					log(`[${HOOK_NAME}] Skipped: background tasks running`, { sessionID })
+					return
+				}
+
 				const verificationSessionID = state.verification_pending
 					? state.verification_session_id
 					: undefined