fix flag logic

wasm-demo.js

@@ -399,7 +399,7 @@ $('btnDecrypt').onclick = () => {
         console.log(`[Main] Result - flag: ${flag}, score: ${score}, total_g: ${total_g}`);
         
         // Create elegant result display
-        const isWatermarked = flag === 1;
+        const isWatermarked = Number(flag) === 1;
         const flagText = isWatermarked ? '✅ Watermarked' : '❌ Not Watermarked';
         const scoreText = `Confidence Score: ${score}`;