feat: add route constant

app/upload/page.tsx

@@ -18,6 +18,7 @@ import {
     saveVideoData,
     clearSession
 } from "@/lib/api"
+import { ROUTES } from "@/utils/routes"
 import { storeVideoFile } from "@/lib/video-storage"
 
 const API_URL = process.env.NEXT_PUBLIC_API_URL
@@ -63,7 +64,7 @@ export default function UploadPage() {
     useEffect(() => {
         const storedSession = loadSession()
         if (!isSessionValid(storedSession)) {
-            router.replace("/new-analysis")
+            router.replace(ROUTES.NEW_ANALYSIS)
             return
         }
         setSession(storedSession)
@@ -136,7 +137,7 @@ export default function UploadPage() {
 
     const handleBackToSelection = () => {
         clearSession()
-        router.push("/new-analysis")
+        router.push(ROUTES.NEW_ANALYSIS)
     }
 
     const getTitle = () => {