fix: increase NIP-07 extension timeout to 5000ms

Increases the default wait time for NIP-07 extension injection from 1.5s to 5s.
This resolves timeout errors for users on slower connections or devices where
the extension takes longer to inject `window.nostr`.

Verified with a reproduction script that simulates delayed injection.

js/nostr/nip07Permissions.js

@@ -311,7 +311,7 @@ export const __testExports = {
   normalizePermissionMethod,
 };
 
-export function waitForNip07Extension(timeoutMs = 1500) {
+export function waitForNip07Extension(timeoutMs = 5000) {
   return new Promise((resolve, reject) => {
     if (typeof window !== "undefined" && window.nostr) {
       resolve(window.nostr);