fix: opening link to sign a file while not logged in is not redirecting correctly

src/App.tsx

@@ -33,6 +33,12 @@ const App = () => {
     }
   }
 
+  const handleRootRedirect = () => {
+    if (authState.loggedIn) return appPrivateRoutes.homePage
+    const callbackPathEncoded = btoa(window.location.href.split(`${window.location.origin}/#`)[1])
+    return `${appPublicRoutes.login}?callbackPath=${callbackPathEncoded}`
+  }
+
   return (
     <Routes>
       <Route element={<MainLayout />}>
@@ -70,11 +76,7 @@ const App = () => {
           path="*"
           element={
             <Navigate
-              to={
-                authState.loggedIn
-                  ? appPrivateRoutes.homePage
-                  : appPublicRoutes.login
-              }
+              to={handleRootRedirect()}
             />
           }
         />

src/pages/login/index.tsx

@@ -2,7 +2,7 @@ import { Box, Button, TextField, Typography } from '@mui/material'
 import { getPublicKey, nip19 } from 'nostr-tools'
 import { useEffect, useState } from 'react'
 import { useDispatch } from 'react-redux'
-import { useNavigate } from 'react-router-dom'
+import { useNavigate, useSearchParams } from 'react-router-dom'
 import { toast } from 'react-toastify'
 import { LoadingSpinner } from '../../components/LoadingSpinner'
 import {
@@ -22,6 +22,8 @@ import { npubToHex, queryNip05 } from '../../utils'
 import styles from './style.module.scss'
 
 export const Login = () => {
+  const [searchParams] = useSearchParams()
+
   const dispatch: Dispatch = useDispatch()
   const navigate = useNavigate()
 
@@ -53,6 +55,19 @@ export const Login = () => {
     }
   }
 
+  const navigateAfterLogin = (path: string) => {
+    const callbackPath = searchParams.get('callbackPath')
+    
+    if (callbackPath) {
+      // base64 decoded path
+      const path = atob(callbackPath)
+      navigate(path)
+      return
+    }
+
+    navigate(path)
+  }
+
   const loginWithExtension = async () => {
     setIsLoading(true)
     setLoadingSpinnerDesc('Capturing pubkey from nostr extension')
@@ -66,7 +81,7 @@ export const Login = () => {
         const redirectPath =
           await authController.authenticateAndFindMetadata(pubkey)
 
-        navigate(redirectPath)
+        navigateAfterLogin(redirectPath)
       })
       .catch((err) => {
         toast.error('Error capturing public key from nostr extension: ' + err)
@@ -109,7 +124,7 @@ export const Login = () => {
         return null
       })
 
-    if (redirectPath) navigate(redirectPath)
+    if (redirectPath) navigateAfterLogin(redirectPath)
 
     setIsLoading(false)
     setLoadingSpinnerDesc('')
@@ -204,7 +219,7 @@ export const Login = () => {
             return null
           })
 
-        if (redirectPath) navigate(redirectPath)
+        if (redirectPath) navigateAfterLogin(redirectPath)
       })
       .catch((err) => {
         toast.error(
@@ -264,7 +279,7 @@ export const Login = () => {
             return null
           })
 
-        if (redirectPath) navigate(redirectPath)
+        if (redirectPath) navigateAfterLogin(redirectPath)
       })
       .catch((err) => {
         toast.error(