feat(audio-player): Resume Rewind select in the settings popover

The player window could only change Skip and Speed; resume rewind
lived exclusively on the profile page. The user-facing settings now
match Speed's precedent — changeable from the player, saved to the
account, applied immediately.

The select mirrors the default-speed row (CSP-safe @change bound to
one Alpine method; templ emits the option list from the shared
ResumeRewindOptions allow-list and the :selected expression against
the live resumeRewind field). Applying updates the running player's
value first — the next open/unpause uses it with no reload — then
PUTs audio_resume_rewind_seconds to the profile endpoint as the
string wire shape the server binds. normalizeResumeRewind gates the
select's value through 0/5/10 before both steps.

web/src/audio.ts

@@ -789,6 +789,27 @@ Alpine.data("audioReader", () => ({
   applyDefaultSpeedFromSelect(e: Event) {
     this.setDefaultSpeed(Number((e.target as HTMLSelectElement).value));
   },
+  // Player-side control of the account setting: applies LIVE (the
+  // next open/unpause uses it — no reload) and rides the profile
+  // endpoint like the profile-page select. String wire shape — the
+  // server binds audio_resume_rewind_seconds keep_screen_awake-style.
+  applyResumeRewindFromSelect(e: Event) {
+    const seconds = normalizeResumeRewind((e.target as HTMLSelectElement).value);
+    this.resumeRewind = seconds;
+    fetch("/api/auth/profile", {
+      method: "PUT",
+      headers: { ...getAuthHeaders(), "content-type": "application/json" },
+      body: JSON.stringify({ audio_resume_rewind_seconds: String(seconds) }),
+    })
+      .then((r) => {
+        if (!r.ok) throw new Error(String(r.status));
+        showToast(
+          seconds === 0 ? "Resume rewind off" : `Resume rewind: ${seconds}s before saved position`,
+          "success",
+        );
+      })
+      .catch(() => showToast("Resume rewind not saved", "error"));
+  },
   isDefaultSpeed(rate: number): boolean {
     return this.defaultSpeed === rate;
   },