feat(tts): integrate autonomous Piper neural TTS with zero-latency pre-warming for words and context

app/static/js/modules/dictionary.js

@@ -3,7 +3,7 @@
 // =======================================================================
 
 import { api } from './api.js';
-import { escapeHtml, showToast, openModal, closeModal } from './ui.js';
+import { escapeHtml, showToast, openModal, closeModal, playAudio } from './ui.js';
 
 export let allCards = [];
 export let collectionsList = ['General', 'Разговорный', 'Работа & IT', 'Книги & Сериалы', 'Идиомы'];
@@ -163,6 +163,14 @@ export function initDictionary() {
         }
     });
 
+    if (audioPlayBtn) {
+        audioPlayBtn.addEventListener('click', () => {
+            if (!currentLookupData || !currentLookupData.term) return;
+            const url = currentLookupData.audio_url || `/api/tts?text=${encodeURIComponent(currentLookupData.term)}&lang=en`;
+            playAudio(url);
+        });
+    }
+
     async function performLookup() {
         const term = termInput.value.trim();
         if (!term) return;
@@ -188,7 +196,7 @@ export function initDictionary() {
         resPhonetic.textContent = data.phonetic || '';
         resPhonetic.style.display = data.phonetic ? 'inline-block' : 'none';
         resPos.textContent = data.part_of_speech || 'Phrase';
-        audioPlayBtn.classList.add('hidden');
+        if (audioPlayBtn) audioPlayBtn.classList.remove('hidden');
 
         if (data.definition_en) {
             resDefinition.textContent = data.definition_en;