fix: guard transcript sandbox subscription

src/components/SandboxViolationExpandedView.tsx

@@ -32,7 +32,13 @@ export function SandboxViolationExpandedView() {
   let t2;
   if ($[1] === Symbol.for("react.memo_cache_sentinel")) {
     t1 = () => {
+      if (!SandboxManager.isSandboxingEnabled() || getPlatform() === "linux") {
+        return;
+      }
       const store = SandboxManager.getSandboxViolationStore();
+      if (!store || typeof store.subscribe !== "function") {
+        return;
+      }
       const unsubscribe = store.subscribe(allViolations => {
         setViolations(allViolations.slice(-10));
         setTotalCount(store.getTotalCount());