feat: add logging for voice list retrieval from cache and fix loading option text

internal/tts/microsoft/client.go

@@ -117,6 +117,8 @@ func (c *Client) ListVoices(ctx context.Context, locale string) ([]models.Voice,
 	// 检查缓存是否有效
 	c.voicesCacheMu.RLock()
 	if !c.voicesCacheExpiry.IsZero() && time.Now().Before(c.voicesCacheExpiry) && len(c.voicesCache) > 0 {
+		// 从缓存中获取
+		log.Println("ListVoices 从缓存中获取语音列表: ", len(c.voicesCache), "个", "剩余时间:", c.voicesCacheExpiry.Sub(time.Now()))
 		voices := c.voicesCache
 		c.voicesCacheMu.RUnlock()
 
@@ -135,6 +137,7 @@ func (c *Client) ListVoices(ctx context.Context, locale string) ([]models.Voice,
 	c.voicesCacheMu.RUnlock()
 
 	// 缓存无效，需要从API获取
+	log.Println("ListVoices, 缓存未命中，从API获取语音列表")
 	endpoint, err := c.getEndpoint(ctx)
 	if err != nil {
 		return nil, err

web/templates/index.html

@@ -947,7 +947,7 @@
                         <label for="style" class="mb-1 font-semibold text-slate-700">风格:</label>
                         <select id="style"
                                 class="p-2 border border-slate-300 rounded-md bg-white/90 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500 transition">
-                            <option value="loading">加载<EFBFBD><EFBFBD><EFBFBD>...</option>
+                            <option value="loading">加载中...</option>
                         </select>
                     </div>
                 </div>