fix: media progress bar initial width and duration labels

app/src/main/assets/h5/css/app.css

@@ -301,6 +301,16 @@ body {
   transition: width .3s linear;
 }
 
+/* 时长文字：当前时长 / 总时长 */
+/* Time labels: current / total duration */
+.media-card .time-row {
+  display: flex;
+  justify-content: space-between;
+  font-size: 11px;
+  color: var(--text-dim);
+  margin-top: 4px;
+}
+
 /* 无时长信息时的活动脉冲进度条 */
 /* Indeterminate pulse when no duration is available */
 .media-card .bar.indeterminate {

app/src/main/assets/h5/js/pages/home.js

@@ -161,6 +161,7 @@ function renderMediaCard(info) {
   const playIcon = info.playing ? ICON_PAUSE : ICON_PLAY;
   // title/artist 来自任意应用元数据，转义后插入，防 XSS
   // title/artist come from arbitrary app metadata; escape before insert (XSS)
+  const pct = info.duration ? Math.min(100, (info.position / info.duration) * 100) : 0;
   el.innerHTML = `
     <div class="media-layout">
       ${coverHtml}
@@ -169,7 +170,11 @@ function renderMediaCard(info) {
         <div class="ar">${escapeHtml(info.artist)}</div>
       </div>
     </div>
-    <div class="prog"><div class="bar"></div></div>
+    <div class="prog"><div class="bar" style="width:${pct}%"></div></div>
+    <div class="time-row">
+      <span class="t-cur">${fmtDuration(info.position)}</span>
+      <span class="t-total">${fmtDuration(info.duration)}</span>
+    </div>
     <div class="controls">
       <button class="ctl" data-act="prev" title="上一首">${ICON_PREV}</button>
       <button class="ctl play" data-act="play" title="播放/暂停">${playIcon}</button>
@@ -209,20 +214,35 @@ function updateMediaProgressState(info) {
 let mediaTicker = null;
 function startMediaTicker() {
   if (mediaTicker) return;
-  mediaTicker = setInterval(() => {
+  const tick = () => {
+    if (!mediaProgressState) return;
     const bar = document.querySelector('.media-card .bar');
-    if (!bar || !mediaProgressState) return;
+    const cur = document.querySelector('.media-card .t-cur');
     const { position, duration, playing, updatedAt } = mediaProgressState;
     if (!duration) {
       // 无时长信息（部分 App 不提供 duration）：显示活动脉冲而非空白
       // No duration (some apps omit it): show an indeterminate pulse instead of blank
-      bar.classList.add('indeterminate');
+      if (bar) bar.classList.add('indeterminate');
       return;
     }
-    bar.classList.remove('indeterminate');
     const pos = playing ? position + (Date.now() - updatedAt) : position;
+    if (bar) {
+      bar.classList.remove('indeterminate');
       bar.style.width = Math.min(100, (pos / duration) * 100) + '%';
-  }, 1000);
+    }
+    if (cur) cur.textContent = fmtDuration(pos);
+  };
+  tick(); // 立即执行一次，避免初始 1 秒内进度条空白
+  mediaTicker = setInterval(tick, 1000);
+}
+
+// 时长格式化：毫秒 -> m:ss（未知返回 --:--）
+// Duration format: ms -> m:ss (--:-- when unknown)
+function fmtDuration(ms) {
+  if (!ms || ms <= 0) return '--:--';
+  const s = Math.floor(ms / 1000);
+  const m = Math.floor(s / 60);
+  return m + ':' + String(s % 60).padStart(2, '0');
 }
 
 // 布局方向：默认上下（封面在上、信息在下），横条（宽>高）时左右