Refactor code for improved readability and consistency

- Updated CSRF middleware to enhance cookie value decoding.
- Reformatted OAuth proxy token store initialization for better clarity.
- Adjusted Challonge proxy router for consistent line breaks and readability.
- Enhanced OAuth router error handling and response formatting.
- Improved session router for better readability and consistency in fetching provider records.
- Refactored OAuth token store to improve key derivation logging.
- Cleaned up cookie options utility for better readability.
- Enhanced Challonge client credentials composable for consistent API calls.
- Streamlined OAuth composable for improved logging.
- Refactored main.js for better readability in session initialization.
- Improved Challonge v2.1 service error handling for better clarity.
- Cleaned up API client utility for improved readability.
- Enhanced ApiKeyManager.vue for better text formatting.
- Refactored ChallongeTest.vue for improved readability in composable usage.

code/websites/pokedex.online/server/services/oauth-token-store.js

@@ -27,7 +27,9 @@ function getEncryptionKey(sessionSecret) {
   }
 
   // Dev fallback: derive from session secret (still better than plaintext)
-  logger.warn('OAUTH_TOKEN_ENC_KEY not set; deriving key from SESSION_SECRET (dev only).');
+  logger.warn(
+    'OAUTH_TOKEN_ENC_KEY not set; deriving key from SESSION_SECRET (dev only).'
+  );
   return crypto.createHash('sha256').update(sessionSecret).digest();
 }
 
@@ -149,7 +151,10 @@ export function createOAuthTokenStore({ sessionSecret }) {
     const ts = now();
     if (existing) {
       existing.lastSeenAt = ts;
-      existing.expiresAt = Math.min(existing.createdAt + SEVEN_DAYS_MS, ts + ONE_DAY_MS);
+      existing.expiresAt = Math.min(
+        existing.createdAt + SEVEN_DAYS_MS,
+        ts + ONE_DAY_MS
+      );
       return existing;
     }