add another nip-07 recommendation

src/views/login/nsec.tsx

@@ -90,6 +90,10 @@ export default function LoginNsecView() {
             <Link isExternal href="https://getalby.com/" target="_blank">
               Alby
             </Link>
+            {", "}
+            <Link isExternal href="https://github.com/susumuota/nostr-keyx" target="_blank">
+              nostr-keyx
+            </Link>
             {" or "}
             <Link
               isExternal

src/views/login/start.tsx

@@ -46,9 +46,11 @@ export default function LoginStartView() {
           <AlertDescription>There are bugs and things will break.</AlertDescription>
         </Box>
       </Alert>
+      {window.nostr && (
         <Button onClick={loginWithExtension} colorScheme="brand">
-        Use browser extension
+          Use browser extension (NIP-07)
         </Button>
+      )}
       <Button onClick={() => navigate("./nip05")}>Login with Nip-05 Id</Button>
       <Button onClick={() => navigate("./npub")}>Login with pubkey key (npub)</Button>
       <Button onClick={() => navigate("./nsec")}>Login with secret key (nsec)</Button>