Add fullscreen player sheet and surah ayah TOC.

Tap the dock to expand; open فهرست for the current surah list with ±15s skips and remaining time, without interrupting the single audio session.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/TafsirQuran.UI/wwwroot/js/app.js

@@ -59,5 +59,24 @@ window.tqAudio = {
   seek: (audio, value) => {
     if (!audio) return;
     audio.currentTime = Number(value) || 0;
+  },
+
+  seekBy: (audio, deltaSeconds) => {
+    if (!audio) return 0;
+    const dur = Number.isFinite(audio.duration) ? audio.duration : 0;
+    let next = (audio.currentTime || 0) + (Number(deltaSeconds) || 0);
+    if (next < 0) next = 0;
+    if (dur > 0 && next > dur) next = dur;
+    audio.currentTime = next;
+    return next;
+  },
+
+  getState: (audio) => {
+    if (!audio) return { time: 0, duration: 0, playing: false };
+    return {
+      time: audio.currentTime || 0,
+      duration: audio.duration || 0,
+      playing: !audio.paused
+    };
   }
 };