feat: Implement Phase 5 optimization and best practices

src/lib/moderation/constants.ts

@@ -0,0 +1,33 @@
+/**
+ * Moderation Queue Constants
+ * 
+ * Centralized configuration values for the moderation system.
+ */
+
+export const MODERATION_CONSTANTS = {
+  // TanStack Query configuration
+  QUERY_STALE_TIME: 30000,                    // 30 seconds
+  QUERY_GC_TIME: 5 * 60 * 1000,              // 5 minutes
+  QUERY_RETRY_COUNT: 2,
+  
+  // Realtime configuration
+  REALTIME_DEBOUNCE_MS: 500,                  // 500ms
+  REALTIME_OPTIMISTIC_REMOVAL_TIMEOUT: 5000,  // 5 seconds
+  
+  // Lock configuration
+  LOCK_DURATION_MS: 15 * 60 * 1000,          // 15 minutes
+  LOCK_EXTENSION_MS: 10 * 60 * 1000,         // 10 minutes
+  
+  // Cache configuration
+  MAX_ENTITY_CACHE_SIZE: 500,
+  MAX_PROFILE_CACHE_SIZE: 500,
+  
+  // Pagination
+  DEFAULT_PAGE_SIZE: 25,
+  MAX_PAGE_SIZE: 100,
+  
+  // Filter debounce
+  FILTER_DEBOUNCE_MS: 300,
+} as const;
+
+export type ModerationConstants = typeof MODERATION_CONSTANTS;

src/lib/moderation/index.ts

@@ -64,3 +64,7 @@ export {
 } from './lockHelpers';
 
 export type { LockStatus, LockUrgency } from './lockHelpers';
+
+// Constants
+export { MODERATION_CONSTANTS } from './constants';
+export type { ModerationConstants } from './constants';