fix: update EdgeProvider to correctly set back button visibility based on pathname

src/providers/EdgeProvider.tsx

@@ -55,6 +55,8 @@ export default function EdgeProvider({ children }: React.PropsWithChildren) {
   useEffect(() => {
     if (pathname === '/') {
       setBackBtn(false)
+    } else {
+      setBackBtn(true)
     }
     //사이드바 초기화
     reset()