fix(map): don't paint from a backend whose swap is still deferred

The quiescence gate drops the decoded tiles and clears the dedup ring
unconditionally, which is right, but it also fell through to
renderMapTiles() with s_tile_fs still pointing at the old backend. On the
teardown side that means probing &SD for a card that is gone -- up to five
opens per tile, each paying a full sd_diskio timeout, on the loop task.

Return after the invalidation when the swap could not be applied.
sdHealthTick renders as soon as it lands it.

Signed-off-by: Pixel Perfect <me@pixp.cc>

src/ui-touch/UITask.cpp

@@ -25923,6 +25923,13 @@ static void mapNoteStorageChanged() {
   for (int i = 0; i < k_tile_fetch_dedup_size; ++i) s_tile_fetch_dedup[i] = 0;
   s_tile_fetch_dedup_head = 0;
   freeMapTiles();
+#if CAP_SD || defined(TLORA_PAGER)
+  // Drop the stale tiles above either way, but do not paint from a backend we
+  // already know is wrong — that would read through &SD for a card that is gone
+  // and pay a full SPI timeout per probe on the loop task. sdHealthTick renders
+  // as soon as it lands the deferred swap.
+  if (!may_swap) return;
+#endif
   if (g_lv.tabview && lv_tabview_get_tab_act(g_lv.tabview) == MAP_TAB_INDEX) renderMapTiles();
 }