android: the handoff — the pending rounds, the pipeline, and what is unverified

Everything written this session that has not been through the device: rounds 43
to 48 (each patch adversarially verified, 43's transient-notice expectation
fixed), a partial round 49, the pipeline scripts, the Android Auto design and
the icon comparison mock. Also the two harness changes that were never A/B'd —
adaptive waits, which may only shorten a declared wait and never lengthen it,
and a ship that runs the mock walk and the deploy at the same time. The A/B and
its 255-step baseline are in handoff/tools; main stays at what the phone has
actually walked.

handoff/rounds/ins-r37-pl-glue.txt

@@ -0,0 +1,40 @@
+
+    /* ── dragged into place ───────────────────────────────────────────
+       Press and hold a row and it lifts, the rows below make room, and
+       letting go lands it (../reorder.js). A press released without moving
+       still opens the row's sheet, so nothing that worked yesterday stops
+       working. The sheet's Move rows stay too: they are the accessible
+       path, and the one that is still honest under a filter — a filtered
+       list's visible order is NOT the stored order, so the drag itself is
+       refused while the search has anything in it, the way the desktop
+       refuses it ("reordering a partial view would be a lie about the
+       saved sequence"), and the note under the field says so. */
+    const canDrag = $derived(!q.trim() && items.length > 1);
+    let dragFrom = null;
+    function dragLift() { pls.dragging = true; dragFrom = items; }
+    function dragHold(i) { const it = visible[i]; if (it) sheet(it); }
+    /* a drop clears the flag when the write settles, not when the finger
+       lifts: releasing it earlier would let the deferred re-read land the
+       OLD order between the two */
+    function dragEnd(dropped) { if (!dropped) pls.dragging = false; }
+    function dragDrop(from, to) {
+        /* a refetch that landed mid-drag replaced the rows under us: the
+           indices the gesture collected address a list that is gone */
+        if (items !== dragFrom || q.trim()) { pls.dragging = false; return; }
+        const snap = items.slice();
+        const next = snap.slice();
+        const [row] = next.splice(from, 1);
+        if (!row) { pls.dragging = false; return; }
+        next.splice(to, 0, row);
+        /* optimistic: the row is where you put it before the backend has
+           been asked, and comes back if the answer is no */
+        items = next;
+        moveItem(pl, snap, row, to)
+            .catch((e) => { items = snap; player.error = String(e); })
+            .finally(() => { pls.dragging = false; });
+    }
+    /* `enabled` is a function, not a value: an action's `update` is
+       deprecated in Svelte 5, so an options object that has to change
+       identity to be heard is not something to lean on. This one is asked
+       at the press, every press. */
+    const rowDrag = { enabled: () => canDrag, rowSel: ".trk", skipSel: ".r", scrollSel: ".screen", onLift: dragLift, onDrop: dragDrop, onHold: dragHold, onEnd: dragEnd };