android: reorder from the sheet — a playlist row up, down or to the top; a queue row up or down

Without a drag: a playlist row's sheet moves it up, down or to the top and
persists the whole order in one call (playlist_set_order, as the desktop's
drop does); a queue row's sheet moves it up or down, never past the track
playing. Also src-tauri/android/ship.sh — one round end to end: the mock
walk, the embedded build installed, the phone walk, the commit, each step
gated on the one before.

src/mobile/playlists.svelte.js

@@ -184,6 +184,21 @@ export async function deletePlaylist(p) {
     await refreshPlaylists();
 }
 
+/* ── reorder: a row up, down or to the top; the complete id order goes
+   in one call, as the desktop's drop does ── */
+export async function moveItem(p, items, item, where) {
+    const ids = items.map((i) => i.id);
+    const from = ids.indexOf(item.id);
+    if (from < 0) return false;
+    const to = where === "top" ? 0 : where === "up" ? from - 1 : from + 1;
+    if (to < 0 || to >= ids.length || to === from) return false;
+    ids.splice(from, 1);
+    ids.splice(to, 0, item.id);
+    await api.playlistSetOrder(p.id, ids);
+    await refreshPlaylists();
+    return true;
+}
+
 /* ── removal, undoable ───────────────────────────────────────────────── */
 let undoTimer = 0;
 function stashUndo(playlistId, rows, label) {