patches: move lastCursorRect ivar from patch 1 to patch 5

The ivar was declared in patch 0001 but first used in patch 0005,
creating dead code in intermediate commits 0001-0004.  Now each
commit only introduces declarations that are immediately used.

patches/0004-ns-add-interactive-span-elements-for-Tab-navigation.patch

@@ -1,4 +1,4 @@
-From 8675f0f75a33e4a3621e0b1e15aab7eff2c81369 Mon Sep 17 00:00:00 2001
+From 30fc5f90489e8802ed950317076ce39cdab66d25 Mon Sep 17 00:00:00 2001
 From: Martin Sukany <martin@sukany.cz>
 Date: Sat, 28 Feb 2026 12:58:11 +0100
 Subject: [PATCH 4/8] ns: add interactive span elements for Tab navigation