Update app.py

app.py

@@ -174,7 +174,7 @@ async def _startup():
 
 @app.get("/health")
 async def health():
-    return {"status": "healthy", "timestamp": datetime.utcnow().isoformat()}
+    return {"status": "healthy", "timestamp": dt.utcnow().isoformat()}
 
 @app.post("/api/browser/launch")
 async def launch(request: BrowserLaunchRequest):
@@ -239,7 +239,7 @@ async def screenshot(req: ScreenshotRequest):
             png = await sess["playwright_page"].screenshot(full_page=req.full_page)
         # Convert to base64
         b64 = base64.b64encode(png).decode()
-        return {"screenshot": b64, "format": "png", "timestamp": datetime.utcnow().isoformat()}
+        return {"screenshot": b64, "format": "png", "timestamp": dt.utcnow().isoformat()}
     except Exception as e:
         logger.error(f"Error taking screenshot: {e}")
         raise HTTPException(status_code=500, detail=str(e))
@@ -342,7 +342,7 @@ async def scrape_content(request: ScrapeRequest):
                 elements = soup.select(selector)
                 scraped_data[selector] = [elem.get_text(strip=True) for elem in elements]
         
-        return {"data": scraped_data, "timestamp": datetime.now().isoformat()}
+        return {"data": scraped_data, "timestamp": dt.now().isoformat()}
         
     except Exception as e:
         logger.error(f"Error scraping content: {e}")
@@ -355,7 +355,7 @@ async def list_sessions():
     for session_id, session_data in browser_instances.items():
         sessions.append({
             'session_id': session_id,
-            'created_at': datetime.fromtimestamp(session_data['created_at']).isoformat(),
+            'created_at': dt.fromtimestamp(session_data['created_at']).isoformat(),
             'config': session_data['config']
         })