[PATCH manager v2] fix #7136: ui: tree: harmonize folder view resource ordering

[Elias Huhsovitz <e.huhsovitz@proxmox.com>]

Resources in the Folder View are ordered lexicographically, whereas the
Server View uses the `getTypeOrder` function for ordering.

This happens because grouping nodes in the Folder View have their `type`
property set to the literal string 'type', causing `getTypeOrder` to
return the same default value for all groups.

Fix this by resolving the actual resource type from the `groupbyid`
field in `nodeSortFn` when `type === 'type'`. This applies the defined
sort order (LXC, QEMU, Node, SDN, Network, Storage).

Signed-off-by: Elias Huhsovitz <e.huhsovitz@proxmox.com>
---
Changes v1->v2:
---------------
* preserve the type: 'type' semantic marker used by other UI
  components
* resolve the actual resource type from groupbyid in nodeSortFn
  when type === 'type'
* do not refactor bug-irrelevant variables from `let` to `const`
* run `make tidy`
* update commit message

(Thanks @Dominik for the review)

v1: https://lore.proxmox.com/pve-devel/20260818083110.15786-1-e.huhsovitz@proxmox.com/

 www/manager6/tree/ResourceTree.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/www/manager6/tree/ResourceTree.js b/www/manager6/tree/ResourceTree.js
index 6ea28919..e2acc431 100644
--- a/www/manager6/tree/ResourceTree.js
+++ b/www/manager6/tree/ResourceTree.js
@@ -121,7 +121,9 @@ Ext.define('PVE.tree.ResourceTree', {
             let n2IsGuest = n2.type === 'qemu' || n2.type === 'lxc';
             if (me['group-guest-types'] || !n1IsGuest || !n2IsGuest) {
                 // first sort (group) by type
-                let res = me.getTypeOrder(n1.type) - me.getTypeOrder(n2.type);
+                const type1 = n1.type === 'type' ? n1.groupbyid : n1.type;
+                const type2 = n2.type === 'type' ? n2.groupbyid : n2.type;
+                const res = me.getTypeOrder(type1) - me.getTypeOrder(type2);
                 if (res !== 0) {
                     return res;
                 }
-- 
2.47.3