Gaze checks and calibration in a panel fixed to the headset

ft-gazepanel (gaze/panel) is a SteamVR overlay that stays put in your view and
shows dots at known head-relative directions; the gaze service runs it and
drives it (gaze/gazecheck.py):
- a one-dot quick check 3 s after the headset goes on, when our tracker asks
  for a click (reseat), at most every 2 minutes, and from Quick check on the
  Gaze page; five dots follow if the next 3 lessons are still over 2 degrees off
- the full calibration (the probe's three rounds, dark to bright) when gaze mode
  comes on without one, or from Calibrate; quitting it with still no calibration
  turns gaze mode off
Each dot takes the gaze once it has held still for 0.6 s; a left click or Meta+J
takes it at once, a right click or Meta+K closes the panel (the pointer helper
hides its dot and passes those presses on while "calpanel" lasts). Our tracker
gets clicks and its own calibration; SteamVR's gets lessons per eye, or a new
calibration.json.

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

input-settings/main.qml

@@ -815,9 +815,23 @@ Kirigami.ApplicationWindow {
             property var status: backend.gazeStatus
             actions: [
                 Kirigami.Action {
-                    text: "Calibrate…"
+                    text: "Quick check"
                     icon.name: "crosshairs"
-                    tooltip: "Open the gaze probe to calibrate (fullscreen on a Frametop screen)"
+                    enabled: backend.gazeServiceRunning
+                    tooltip: "One dot in front of you in the headset: look at it, and the gaze tracker relearns where it sits"
+                    onTriggered: backend.gazeQuickCheck()
+                },
+                Kirigami.Action {
+                    text: "Calibrate"
+                    icon.name: "crosshairs"
+                    enabled: backend.gazeServiceRunning
+                    tooltip: "The full calibration in the headset: 21 dots in three rounds, dark to bright"
+                    onTriggered: backend.gazeCalibrate()
+                },
+                Kirigami.Action {
+                    text: "Gaze probe…"
+                    icon.name: "crosshairs"
+                    tooltip: "The lab tool: calibrate, test, and practise on a Frametop screen"
                     onTriggered: backend.openGazeProbe()
                 },
                 Kirigami.Action {