diff --git a/.claude/scheduled_tasks.lock b/.claude/scheduled_tasks.lock
new file mode 100644
index 0000000..e3c4778
--- /dev/null
+++ b/.claude/scheduled_tasks.lock
@@ -0,0 +1 @@
+{"sessionId":"7dcf4561-975e-4864-a297-1814a6ac9aea","pid":12187,"acquiredAt":1776060371368}
\ No newline at end of file
diff --git a/src/features/scan/ScanPage.tsx b/src/features/scan/ScanPage.tsx
index 27e79a4..7d132ef 100644
--- a/src/features/scan/ScanPage.tsx
+++ b/src/features/scan/ScanPage.tsx
@@ -49,6 +49,16 @@ export function ScanPage() {
 	const bufRef = useRef<SseBuf>(freshBuf());
 	const timerRef = useRef<ReturnType<typeof setInterval> | null>(null);
 
+	// Stop the periodic flush interval. Inlined into flush() to avoid a
+	// circular useCallback dep (flush → stopFlushing → flush) that tripped
+	// TDZ in prod builds: "can't access lexical declaration 'o' before initialization".
+	const clearFlushTimer = () => {
+		if (timerRef.current) {
+			clearInterval(timerRef.current);
+			timerRef.current = null;
+		}
+	};
+
 	// Flush buffered SSE data to React state
 	const flush = useCallback(() => {
 		const b = bufRef.current;
@@ -72,16 +82,16 @@ export function ScanPage() {
 			setStatusLabel(`Scan complete — ${d.scanned ?? "?"} items, ${d.errors ?? 0} errors`);
 			setScanComplete(true);
 			setStatus((prev) => (prev ? { ...prev, running: false } : prev));
-			stopFlushing();
+			clearFlushTimer();
 		}
 
 		if (b.lost) {
 			b.lost = false;
 			setStatusLabel("Scan connection lost — refresh to see current status");
 			setStatus((prev) => (prev ? { ...prev, running: false } : prev));
-			stopFlushing();
+			clearFlushTimer();
 		}
-	}, [stopFlushing]);
+	}, []);
 
 	const startFlushing = useCallback(() => {
 		if (timerRef.current) return;
@@ -90,8 +100,7 @@ export function ScanPage() {
 
 	const stopFlushing = useCallback(() => {
 		if (!timerRef.current) return;
-		clearInterval(timerRef.current);
-		timerRef.current = null;
+		clearFlushTimer();
 		flush(); // final flush
 	}, [flush]);