Speed up Nostr login and fix list sync, signer persistence, and feed registration

The NIP-07 login flow was extremely slow because list decryption (blocks,
subscriptions, hashtag preferences) started before the signer was ready.
On page refresh, all three services failed with "permission-required" and
scheduled 3-second retry delays, adding 6-10 seconds to every login.

Key fixes:
- List loading now waits for the permission pre-grant to complete before
  attempting decryption, ensuring the signer is available on first try
- Extension wait timeout increased from 3s to 5s for slower extensions
- Decrypt timeouts reduced from 20s to 10s (signer is guaranteed ready)
- Auto-login now forwards authType/providerId from saved profiles
- Storage tab unlock falls back to ensureActiveSignerForPubkey when the
  global signer is not yet registered
- Watch history feed registration adds defensive re-registration and
  try/catch fallback to prevent "Feed not registered" errors
- Decryption scheme cache TTL extended from 10 minutes to 2 hours
- ensureExtensionPermissions waits for extension injection when there
  are outstanding permissions to request (was returning immediately)

https://claude.ai/code/session_01T4wwPu7m5qp1Nxx3H2v57j

js/subscriptions.js

@@ -44,7 +44,11 @@ import {
 
 const SUBSCRIPTION_SET_KIND =
   getNostrEventSchema(NOTE_TYPES.SUBSCRIPTION_LIST)?.kind ?? 30000;
-const DECRYPT_TIMEOUT_MS = 20000;
+// PERF: Reduced from 20s to 10s — the signer is now guaranteed to be ready
+// before list loading starts (authSessionCoordinator waits for the permission
+// pre-grant), so decryption should succeed quickly. 10s is a generous fallback
+// for slow relay responses while still failing fast enough to retry promptly.
+const DECRYPT_TIMEOUT_MS = 10000;
 // PERF: Reduced from 10s to 3s — extensions that already granted permission
 // should recover quickly. The longer delay was causing unnecessary wait time
 // during the critical login path when the first decrypt attempt fails due to