fix(tts): purge legacy free voices and align runtime/UI validation

modules/tts/tts-overlay.html

@@ -2168,7 +2168,12 @@ function normalizeMySpeakers(list) {
         value: String(item?.value || '').trim(),
         source: item?.source || getVoiceSource(item?.value || ''),
         resourceId: item?.resourceId || null,
-    })).filter(item => item.value);
+    })).filter(item => {
+        if (!item.value) return false;
+        // Keep UI behavior aligned with runtime: remove unsupported legacy free voices.
+        if (item.source === 'free' && !TRIAL_VOICE_KEYS.has(item.value)) return false;
+        return true;
+    });
 }
 
 function applyCacheStats(stats = {}) {

modules/tts/tts.js

@@ -915,11 +915,26 @@ async function loadConfig() {
     config = await TtsStorage.load();
     config.volc = config.volc || {};
     
+    let legacyPurged = false;
     if (Array.isArray(config.volc.mySpeakers)) {
-        config.volc.mySpeakers = config.volc.mySpeakers.map(s => ({
+        const normalized = config.volc.mySpeakers.map(s => ({
             ...s,
             source: s.source || getVoiceSource(s.value)
         }));
+        const filtered = normalized.filter(s => {
+            // Purge legacy free voices that are no longer supported by the current free voice map.
+            if (s.source === 'free' && !FREE_VOICE_KEYS.has(s.value)) {
+                legacyPurged = true;
+                return false;
+            }
+            return true;
+        });
+        config.volc.mySpeakers = filtered;
+    }
+
+    if (config.volc.defaultSpeaker && getVoiceSource(config.volc.defaultSpeaker) === 'free' && !FREE_VOICE_KEYS.has(config.volc.defaultSpeaker)) {
+        config.volc.defaultSpeaker = FREE_DEFAULT_VOICE;
+        legacyPurged = true;
     }
     
     config.volc.disableMarkdownFilter = config.volc.disableMarkdownFilter !== false;
@@ -945,6 +960,12 @@ async function loadConfig() {
     config.showFloorButton = config.showFloorButton !== false;
     config.showFloatingButton = config.showFloatingButton === true;
 
+    if (legacyPurged) {
+        await TtsStorage.set('volc', config.volc);
+        await TtsStorage.saveNow({ silent: true });
+        console.info('[TTS] Purged legacy free voices from mySpeakers.');
+    }
+
     return config;
 }