dolphin_kf6, fix error for Qt < 6.8 (#12768)

kde-apps/dolphin/dolphin_kf6-25.08.0.recipe

@@ -29,6 +29,7 @@ REVISION="1"
 SOURCE_URI="https://download.kde.org/stable/release-service/$portVersion/src/dolphin-$portVersion.tar.xz"
 CHECKSUM_SHA256="ddd5e5622594792490695999188c6215c3a0821787c71dfb57dbfdd08e1ce935"
 SOURCE_DIR="dolphin-$portVersion"
+PATCHES="dolphin-$portVersion.patchset"
 ADDITIONAL_FILES="dolphin.rdef.in"
 
 ARCHITECTURES="all !x86_gcc2"

kde-apps/dolphin/patches/dolphin-25.08.0.patchset

@@ -0,0 +1,22 @@
+From e0a33f4f7b5089fb82eeca1cc2f4262cdef42dc8 Mon Sep 17 00:00:00 2001
+From: Luc Schrijvers <begasus@gmail.com>
+Date: Sun, 17 Aug 2025 16:54:30 +0200
+Subject: Fix Qt >= 6.8 error
+
+
+diff --git a/src/views/dolphinview.cpp b/src/views/dolphinview.cpp
+index b702f5b..e81b3b1 100644
+--- a/src/views/dolphinview.cpp
++++ b/src/views/dolphinview.cpp
+@@ -2247,7 +2247,7 @@ void DolphinView::applyDynamicView()
+ 
+     for (const auto &file : itemList) {
+         ++checkedItems;
+-        const QString type = file.mimetype().slice(0, 5);
++        const QString type = file.mimetype().sliced(0, 5);
+ 
+         if (type == "image" || type == "video") {
+             ++imageAndVideoCount;
+-- 
+2.50.1
+