refactor: deduplicate HEX64_REGEX to js/utils/hex.js

Moves the repeatedly defined HEX64_REGEX constant to a shared utility
module to improve maintainability and consistency. Updates all consumers
to import from the new location.

Signed-off-by: Jules <[email protected]>

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

js/services/authService.js

@@ -27,6 +27,7 @@ import getDefaultAuthProvider, {
   providers as defaultAuthProviders,
 } from "./authProviders/index.js";
 import { fetchProfileMetadata } from "./profileMetadataService.js";
+import { HEX64_REGEX } from "../utils/hex.js";
 
 class SimpleEventEmitter {
   constructor(logger = null) {
@@ -69,7 +70,7 @@ class SimpleEventEmitter {
   }
 }
 
-const HEX64_REGEX = /^[0-9a-f]{64}$/i;
+
 const FALLBACK_PROFILE = {
   name: "Unknown",
   picture: "assets/svg/default-profile.svg",

js/services/hashtagPreferencesService.js

@@ -30,10 +30,11 @@ import {
   getLastSuccessfulScheme,
   setLastSuccessfulScheme,
 } from "../nostr/decryptionSchemeCache.js";
+import { HEX64_REGEX } from "../utils/hex.js";
 
 const LOG_PREFIX = "[HashtagPreferences]";
 const HASHTAG_IDENTIFIER = "bitvid:tag-preferences";
-const HEX64_REGEX = /^[0-9a-f]{64}$/i;
+
 const DEFAULT_VERSION = 1;
 const DECRYPT_TIMEOUT_MS = 20000;
 // PERF: Reduced from 10s to 3s for faster recovery during login.

js/services/profileMetadataService.js

@@ -1,9 +1,10 @@
 import { nostrClient } from "../nostrClientFacade.js";
 import { devLogger } from "../utils/logger.js";
 import { relaySubscriptionService } from "./relaySubscriptionService.js";
+import { HEX64_REGEX } from "../utils/hex.js";
 
 const DEFAULT_PROFILE_IMAGE = "assets/svg/default-profile.svg";
-const HEX64_REGEX = /^[0-9a-f]{64}$/i;
+
 const inFlight = new Map();
 
 function normalizePubkey(pubkey) {