diff --git a/examples/ai-streaming/src/index.tsx b/examples/ai-streaming/src/index.tsx
index c172a666d..e8c98f0b3 100644
--- a/examples/ai-streaming/src/index.tsx
+++ b/examples/ai-streaming/src/index.tsx
@@ -40,7 +40,7 @@ class AIStreamingApp extends Widget {
         this.addChild(this._toolCall);
         this.addChild(this._streamingText);
 
-        setInterval(() => {
+        clearInterval(window.__interval); window.__interval = setInterval(() => {
             this._streamingText.tick();
         }, 50);
     }
diff --git a/examples/showcase/src/index.tsx b/examples/showcase/src/index.tsx
index 444be6698..47a52a3e3 100644
--- a/examples/showcase/src/index.tsx
+++ b/examples/showcase/src/index.tsx
@@ -128,7 +128,7 @@ class ShowcaseApp extends Widget {
         if (event.key === 'q' || (event.ctrl && event.key === 'c')) return false;
 
         // Tab switching: 1-5
-        const num = parseInt(event.key);
+        const num = parseInt(event.key, 10);
         if (num >= 1 && num <= 5) {
             this.switchTab(num - 1);
             return true;
diff --git a/packages/dev-server/src/devtools.ts b/packages/dev-server/src/devtools.ts
index 17222d074..8ba43a836 100644
--- a/packages/dev-server/src/devtools.ts
+++ b/packages/dev-server/src/devtools.ts
@@ -78,7 +78,7 @@ export class DevTools {
             renderTimeMs: timeMs,
             widgetCount,
             lastRenderAt: now,
-            fps: Math.round(fps * 10) / 10,
+            fps: Math.round(fps * 10 + Number.EPSILON) / 10,
             memoryMB: Math.round((process.memoryUsage?.().heapUsed ?? 0) / 1024 / 1024 * 10) / 10,
         };
     }