feat: draggable progress bar (seek) and settings sliders

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

@@ -212,6 +212,8 @@ function renderMediaCard(info) {
   // Cover tap opens the media app's playback UI
   const coverEl = el.querySelector('.cover');
   if (coverEl) coverEl.onclick = () => bridge.call('openMediaApp', currentMediaIndex);
+  // 进度条拖动 seek
+  setupMediaSeek(el);
   // 进度状态 + 全局 ticker
   updateMediaProgressState(info);
   startMediaTicker();
@@ -268,6 +270,43 @@ function fmtDuration(ms) {
   return m + ':' + String(s % 60).padStart(2, '0');
 }
 
+// 进度条拖动 seek：拖动预览进度，松手后 seek 到目标位置
+// Progress-bar drag seek: preview while dragging, seek on release
+function setupMediaSeek(el) {
+  const prog = el.querySelector('.prog');
+  if (!prog) return;
+  let dragging = false;
+  const ratioAt = (clientX) => {
+    const rect = prog.getBoundingClientRect();
+    return Math.min(1, Math.max(0, (clientX - rect.left) / rect.width));
+  };
+  const preview = (clientX) => {
+    const bar = el.querySelector('.bar');
+    if (bar) bar.style.width = (ratioAt(clientX) * 100) + '%';
+  };
+  prog.addEventListener('touchstart', (e) => {
+    dragging = true;
+    preview(e.touches[0].clientX);
+  }, { passive: true });
+  prog.addEventListener('touchmove', (e) => {
+    if (dragging) preview(e.touches[0].clientX);
+  }, { passive: true });
+  prog.addEventListener('touchend', (e) => {
+    if (!dragging) return;
+    dragging = false;
+    const ratio = ratioAt(e.changedTouches[0].clientX);
+    const duration = mediaProgressState ? mediaProgressState.duration : 0;
+    if (duration > 0) {
+      const pos = Math.floor(ratio * duration);
+      bridge.call('mediaSeekTo', currentMediaIndex, pos);
+      if (mediaProgressState) {
+        mediaProgressState.position = pos;
+        mediaProgressState.updatedAt = Date.now();
+      }
+    }
+  }, { passive: true });
+}
+
 // 布局方向：默认上下（封面在上、信息在下），横条（宽>高）时左右
 // Layout direction: vertical (cover on top, info below) by default; horizontal
 // (cover left, info right) when the card is wider than tall

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

@@ -116,12 +116,10 @@ function setupMask(page) {
     window.mask.setEnabled(!window.mask.enabled());
     refresh();
   };
-  slider.onclick = (e) => {
-    const rect = slider.getBoundingClientRect();
-    const a = Math.min(1, Math.max(0, (e.clientX - rect.left) / rect.width));
+  makeSliderDraggable(slider, (a) => {
     window.mask.setAlpha(Math.round(a * 100) / 100);
     refresh();
-  };
+  });
 }
 
 // 通知使用权授权项：异步查状态，未授权点击跳转系统授权页
@@ -155,12 +153,10 @@ function setupBrightness(page) {
     const pct = value / 255 * 100;
     sliderEl.style.setProperty('--fill', pct + '%');
     sliderEl.querySelector('i').style.left = pct + '%';
-    sliderEl.onclick = (e) => {
-      e.stopPropagation();
-      const rect = sliderEl.getBoundingClientRect();
-      const v = Math.round(Math.min(255, Math.max(0, (e.clientX - rect.left) / rect.width)) * 255);
+    makeSliderDraggable(sliderEl, (ratio) => {
+      const v = Math.round(ratio * 255);
       bridge.call('setSystemBrightness', v).then(() => renderSlider(v)).catch(() => {});
-    };
+    });
     item.appendChild(sliderEl);
   };
 
@@ -237,3 +233,22 @@ function setupCheckUpdate(page) {
     });
   };
 }
+
+// 通用滑块拖动：touch 拖动实时回调（保留 click 兼容桌面调试）
+// Generic draggable slider: touch-drag with live callback (click kept for desktop)
+function makeSliderDraggable(slider, onRatio) {
+  let dragging = false;
+  const ratioAt = (clientX) => {
+    const rect = slider.getBoundingClientRect();
+    return Math.min(1, Math.max(0, (clientX - rect.left) / rect.width));
+  };
+  slider.addEventListener('touchstart', (e) => {
+    dragging = true;
+    onRatio(ratioAt(e.touches[0].clientX));
+  }, { passive: true });
+  slider.addEventListener('touchmove', (e) => {
+    if (dragging) onRatio(ratioAt(e.touches[0].clientX));
+  }, { passive: true });
+  slider.addEventListener('touchend', () => { dragging = false; }, { passive: true });
+  slider.addEventListener('click', (e) => onRatio(ratioAt(e.clientX)));
+}

app/src/main/java/top/yeij/hearth/media/MediaSessionSource.kt

@@ -154,6 +154,13 @@ class MediaSessionSource(context: Context) {
         Log.d(TAG, "playPause: index=$index playing=$playing")
     }
 
+    // 拖动进度条 seek 到指定位置（毫秒）
+    // Seek to the given position (ms) when dragging the progress bar
+    fun seekTo(index: Int, position: Long) {
+        controllers.getOrNull(index)?.transportControls?.seekTo(position)
+        Log.d(TAG, "seekTo: index=$index position=$position")
+    }
+
     // 跳转到指定会话的播放界面：优先 sessionActivity（PendingIntent），
     // 失败则回退到启动该 App
     // Jump to the session's playback UI: prefer sessionActivity (PendingIntent),

app/src/main/java/top/yeij/hearth/webview/JsBridge.kt

@@ -355,6 +355,13 @@ class JsBridge(
         mediaSourceRef?.next(index)
     }
 
+    // 拖动进度条 seek 到指定位置（毫秒）
+    // Seek to the given position (ms) when dragging the progress bar
+    @android.webkit.JavascriptInterface
+    fun mediaSeekTo(index: Int, position: Long) {
+        mediaSourceRef?.seekTo(index, position)
+    }
+
     // 跳转到指定会话的播放界面（封面点击）
     // Jump to the session's playback UI (cover tap)
     @android.webkit.JavascriptInterface