Checkpoint before line-grid scrolling refactor

public/js/tts-factory-module.js

@@ -32,7 +32,7 @@ class TTSFactoryModule extends BaseModule {
         this.db = null; // Will hold the DB connection
         this.dbName = 'ttsAudioCacheDB';
         this.storeName = 'audioCacheStore';
-        this.dbVersion = 2;
+        this.dbVersion = 3;
         this.currentCacheSize = 0; // Track current size in bytes
         this.maxCacheSizeBytes = 100 * 1024 * 1024; // 100 MB by default
         this.cacheInitialized = false;