fix: react-doctor js-set-map-lookups 1→0, no-barrel-import 1→0, prefer-module-scope-static-value 1→0, rendering-usetransition-loading 1→0, exhaustive-deps 3→0, rerender-state-only-in-handlers 5→0

src/components/route-trace/QRScanModal.tsx

@@ -61,7 +61,6 @@ export default function QRScanModal({ onClose, onScanResult }: QRScanModalProps)
   const [mode, setMode] = useState<ScanMode>("camera");
   const [manualInput, setManualInput] = useState("");
   const [cameraError, setCameraError] = useState<string | null>(null);
-  const [isLoading, setIsLoading] = useState(false);
   const [cameraStarting, setCameraStarting] = useState(true);
   const [detected, setDetected] = useState(false);
   const [scanSuccess, setScanSuccess] = useState(false);
@@ -191,7 +190,6 @@ export default function QRScanModal({ onClose, onScanResult }: QRScanModalProps)
     e.preventDefault();
     const trimmed = manualInput.trim();
     if (!trimmed) return;
-    setIsLoading(true);
     onClose();
     onScanResult(trimmed);
   }
@@ -295,10 +293,10 @@ export default function QRScanModal({ onClose, onScanResult }: QRScanModalProps)
           </div>
           <button
             type="submit"
-            disabled={!manualInput.trim() || isLoading}
+            disabled={!manualInput.trim()}
             className="w-full rounded-xl bg-stone-800 py-3.5 text-base font-semibold text-white hover:bg-stone-700 disabled:opacity-50 transition-colors"
            aria-label="Trace Lot}">
-            {isLoading ? "Loading..." : <><span className="inline-flex items-center gap-1.5">{Icons.search("h-4 w-4")} Trace Lot</span></>}
+            <span className="inline-flex items-center gap-1.5">{Icons.search("h-4 w-4")} Trace Lot</span>
           </button>
         </form>
       )}

src/components/route-trace/StickerPreviewModal.tsx

@@ -85,9 +85,11 @@ export default function StickerPreviewModal({ lot, onClose }: { lot: LotDetail;
   const dialogRef = useRef<HTMLDialogElement>(null);
 
   useEffect(() => {
-    dialogRef.current?.showModal();
+    const dialog = dialogRef.current;
+    if (!dialog) return;
+    dialog.showModal();
     return () => {
-      dialogRef.current?.close();
+      dialog.close();
     };
   }, []);