Fix slow loading and NIP-07 decryption issues

- Reduced `fetchListIncrementally` timeout to 4000ms to fail faster on bad relays.
- Added 15s timeout to decryption calls in `HashtagPreferencesService`, `UserBlockListManager`, and `SubscriptionsManager` to prevent infinite hangs.
- Added handling for "message channel closed" error in `nip07Adapter` with a backoff delay to allow extension recovery.
- Prioritized preserving cached data on decryption failure instead of resetting to empty state.

Co-authored-by: PR0M3TH3AN <[email protected]>

js/userBlocks.js

@@ -1011,10 +1011,21 @@ class UserBlockListManager {
         let decryptionError = null;
 
         try {
-          const [muteList, blockList] = await Promise.all([
+          const decryptPromise = Promise.all([
             decryptEvent(newestMute),
             decryptEvent(newestBlock),
           ]);
+          const timeoutPromise = new Promise((_, reject) =>
+            setTimeout(
+              () => reject(new Error("Decryption timed out after 15s")),
+              15000,
+            ),
+          );
+
+          const [muteList, blockList] = await Promise.race([
+            decryptPromise,
+            timeoutPromise,
+          ]);
 
           muteList.forEach((pk) => mergedPubkeys.add(pk));
           blockList.forEach((pk) => mergedPubkeys.add(pk));