fix(perf): review findings in the service and the panel

- The panel loads only while open. Its models are fresh arrays every
  sample, so a hidden instance rebuilt its rows every 2s for the whole
  session.
- The public IP fetch never kills one already running, and waits 30
  minutes from the last attempt, not the last success: a rate-limited
  or offline fetch was retried every minute.
- curl -4, so an IPv6 answer cannot silently stall the VPN check.
- CPU load sums only the first eight /proc/stat fields. guest and
  guest_nice are already inside user and nice, and counting them again
  read high while VMs ran.
- df gets timeout -k; the VRAM scan is not restarted over itself.
- The GPU name joins the host constants in Perf.qml.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 6 insertions, 5 deletions

diff --git a/desktop/island/StatusPill.qml b/desktop/island/StatusPill.qml
index dd97855..d62b87f 100644
--- a/desktop/island/StatusPill.qml
+++ b/desktop/island/StatusPill.qml
@@ -42,7 +42,7 @@ Capsule {
     restWidth: restRow.implicitWidth + 24
     panelWidth: panel === "perf" ? 600 : 320
     panelHeight: (panel === "controls" ? controlsPanel.implicitHeight
-                : panel === "perf" ? perfPanel.implicitHeight
+                : panel === "perf" ? (perfPanel.item ? perfPanel.item.implicitHeight : 0)
                 : soundPanel.implicitHeight) + 28
 
     // The detailed sampling (per-core, network, VRAM) runs only while the
@@ -191,13 +191,14 @@ Capsule {
         onOpenDrawer: page => pill.openPage(page)
     }
 
-    PerfPanel {
+    // Loaded only while open: its models are fresh arrays every sample, and
+    // a hidden instance would rebuild its rows every 2s for the whole session.
+    Loader {
         id: perfPanel
         x: 14
         y: 14
         width: 600 - 28
-        opacity: pill.panel === "perf" ? 1 : 0
-        visible: opacity > 0
-        Behavior on opacity { NumberAnimation { duration: 160 } }
+        active: pill.panel === "perf"
+        sourceComponent: PerfPanel { width: 600 - 28 }
     }
 }