feat: in offline mode navigate creator to sign screen after creation when creator is first signer

src/pages/create/index.tsx

@@ -389,12 +389,21 @@ export const CreatePage = () => {
           fileUrl
         )}&key=${encodeURIComponent(encryptionKey)}`
       )
+    } else {
+      if (signers[0] && signers[0].pubkey === usersPubkey) {
+        // Create a File object with the Blob data
+        const file = new File([blob], `compressed.sigit`, {
+          type: 'application/sigit'
+        })
+
+        navigate(appPrivateRoutes.sign, { state: { file, encryptionKey } })
       } else {
         saveAs(blob, 'request.sigit')
         setTextToCopy(encryptionKey)
         setOpenCopyModel(true)
       }
     }
+  }
 
   if (authUrl) {
     return (

src/pages/sign/index.tsx

@@ -23,7 +23,7 @@ import { MuiFileInput } from 'mui-file-input'
 import { Event, kinds, verifyEvent } from 'nostr-tools'
 import { useEffect, useState } from 'react'
 import { useSelector } from 'react-redux'
-import { useNavigate, useSearchParams } from 'react-router-dom'
+import { useNavigate, useSearchParams, useLocation } from 'react-router-dom'
 import { toast } from 'react-toastify'
 import { LoadingSpinner } from '../../components/LoadingSpinner'
 import { UserComponent } from '../../components/username'
@@ -69,6 +69,9 @@ enum SignedStatus {
 
 export const SignPage = () => {
   const navigate = useNavigate()
+  const location = useLocation()
+  const { file, encryptionKey: encKey } = location.state || {}
+
   const [searchParams, setSearchParams] = useSearchParams()
 
   const [displayInput, setDisplayInput] = useState(false)
@@ -217,11 +220,23 @@ export const SignPage = () => {
         .finally(() => {
           setIsLoading(false)
         })
+    } else if (file && encKey) {
+      decrypt(file, decodeURIComponent(encKey))
+        .then((arrayBuffer) => {
+          if (arrayBuffer) handleDecryptedArrayBuffer(arrayBuffer)
+        })
+        .catch((err) => {
+          console.error(`error occurred in decryption`, err)
+          toast.error(err.message || `error occurred in decryption`)
+        })
+        .finally(() => {
+          setIsLoading(false)
+        })
     } else {
       setIsLoading(false)
       setDisplayInput(true)
     }
-  }, [searchParams])
+  }, [searchParams, file, encKey])
 
   const decrypt = async (file: File, key: string) => {
     setLoadingSpinnerDesc('Decrypting file')