Refactor user blocking to prioritize standard NIP-51 Mute Lists

- Updates `js/userBlocks.js` to write block entries to a standard Kind 10000 Mute List event.
- Implements a hybrid storage model: unencrypted public mutes are stored in `p` tags, while private blocks are stored in the encrypted event content.
- Maintains read compatibility with legacy `d=user-blocks` lists (both Kind 10000 and Kind 30002) by merging and prioritizing the newest event timestamp.
- Updates local caching to persist both public mutes and private blocks, preventing data loss or "zombie" entries on reload.
- Updates `js/subscriptions.js` to correctly detect NIP-44 capabilities on `Nip07Adapter` signers, fixing a regression where NIP-04 fallback was skipped.
- Updates `js/nostrEventSchemas.js` to mark `USER_BLOCK_LIST` as legacy and define `MUTE_LIST`.
- Updates unit tests to verify the new multi-kind fetching and merged publishing logic.

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

js/subscriptions.js

@@ -887,8 +887,13 @@ class SubscriptionsManager {
       signer = await nostrClient.ensureActiveSignerForPubkey(userPubkey);
     }
 
-    const signerHasNip04 = typeof signer?.nip04Decrypt === "function";
-    const signerHasNip44 = typeof signer?.nip44Decrypt === "function";
+    const signerCapabilities = signer?.capabilities;
+    const signerHasNip04 =
+      typeof signer?.nip04Decrypt === "function" &&
+      (!signerCapabilities || signerCapabilities.nip04 !== false);
+    const signerHasNip44 =
+      typeof signer?.nip44Decrypt === "function" &&
+      (!signerCapabilities || signerCapabilities.nip44 !== false);
 
     const nostrApi = allowPermissionPrompt
       ? typeof window !== "undefined"