Stabilize playback state and cursor feedback

public/js/tts-factory-module.js

@@ -1224,9 +1224,11 @@ class TTSFactoryModule extends BaseModule {
             return null;
         }
         
+        let hash = null;
+        let generationStarted = false;
         try {
             // Generate a hash for this speech request
-            const hash = await this.generateSpeechHash(text);
+            hash = await this.generateSpeechHash(text);
             
             // Check if we have this audio in cache
             const cachedData = await this.getCachedSpeech(hash);
@@ -1242,6 +1244,7 @@ class TTSFactoryModule extends BaseModule {
             
             // Cache miss - need to generate new speech data
             this.cacheMisses++;
+            generationStarted = true;
             this.emitProcessState('waiting-generating', { reason: 'tts-cache-miss', hash });
             
             // If the handler has a preloadSpeech method, use it
@@ -1253,15 +1256,21 @@ class TTSFactoryModule extends BaseModule {
                     await this.cacheSpeech(hash, preloadData.audioData, preloadData.duration);
                     console.log(`TTS Factory: Added speech to cache for hash ${hash} (size: ${this.currentCacheSize}/${this.maxCacheSizeBytes})`);
                     this.emitProcessState('playing-ready', { reason: 'tts-generated', hash });
+                } else if (generationStarted) {
+                    this.emitProcessState('playing-ready', { reason: 'tts-generation-unavailable', hash });
                 }
 
                 return preloadData;
             } else {
                 console.warn(`TTS Factory: Handler ${this.activeHandler} does not support preloading`);
+                this.emitProcessState('playing-ready', { reason: 'tts-preload-unsupported', hash });
                 return null;
             }
         } catch (error) {
             console.error("TTS Factory: Error preloading speech:", error);
+            if (generationStarted || hash) {
+                this.emitProcessState('playing-ready', { reason: 'tts-generation-error', hash, error });
+            }
             return null;
         }
     }