audio player respects group context

app/(app)/(reader)/transcriptions/[slug]/page.tsx

@@ -180,6 +180,7 @@ export default async function TranscriptionPage({
                 subtitle={[t.date, t.place].filter(Boolean).join(" · ")}
                 sourceUrl={`/transcriptions/${t.slug}`}
                 type={t.type}
+                fallbackYear={t.year}
               />
             </div>
           )}

app/(app)/(reader)/transcriptions/[slug]/play-audio-button.tsx

@@ -5,6 +5,11 @@ import {
   type AudioTrack,
   AudioWaveAnimation,
 } from "@/components/audio-player";
+import {
+  rememberedQueue,
+  useTranscriptQueue,
+  yearQueue,
+} from "@/components/audio-player/transcript-queue";
 import { cn } from "@/lib/utils";
 import { Play } from "lucide-react";
 
@@ -17,6 +22,11 @@ type PlayAudioButtonProps = {
   className?: string;
   /** Compact icon-only variant for list items */
   variant?: "default" | "compact";
+  /**
+   * On a lecture's own page: its year, queued as a fallback when the lecture
+   * wasn't opened from a list (search, a shared link…).
+   */
+  fallbackYear?: number | null;
 };
 
 export function PlayAudioButton({
@@ -27,8 +37,18 @@ export function PlayAudioButton({
   type,
   className,
   variant = "default",
+  fallbackYear,
 }: PlayAudioButtonProps) {
-  const { currentTrack, isPlaying, play, togglePlayPause } = useAudioPlayer();
+  const {
+    currentTrack,
+    isPlaying,
+    play,
+    playPlaylist,
+    attachQueue,
+    togglePlayPause,
+  } = useAudioPlayer();
+  // The list this button sits in (a transcription list row), if any.
+  const listQueue = useTranscriptQueue();
 
   const isThisTrack = currentTrack?.url === audioUrl;
   const isThisPlaying = isThisTrack && isPlaying;
@@ -44,7 +64,25 @@ export function PlayAudioButton({
         sourceUrl,
         type: type ?? "lecture",
       };
+      // Queue the list this recording was found in, so Next / Previous
+      // follow it: the list the button sits in, or — on a lecture's own
+      // page — the list it was opened from.
+      const queue =
+        listQueue ??
+        rememberedQueue(sourceUrl.replace(/^\/transcriptions\//, ""));
+      const at = queue?.findIndex((q) => q.url === audioUrl) ?? -1;
+      if (queue && at >= 0 && queue.length > 1) {
+        playPlaylist(queue, at);
+        return;
+      }
+      // No list to follow: start this lecture now — audio must begin inside
+      // the tap, or iOS blocks it — then queue its year once that loads.
       play(track);
+      if (fallbackYear) {
+        void yearQueue(fallbackYear).then((tracks) => {
+          if (tracks && tracks.length > 1) attachQueue(tracks);
+        });
+      }
     }
   }