Gaze learning limit: 55 degrees, past it a quick check; a solid panel

Drops the quick check's second step (3629681): the user didn't want it, and it
re-entered itself every tick, re-placing and redrawing the panel, which
flickered in the headset.

POINTER_GAZE_NUDGE_MAX is the one learning limit, now 55 degrees by default:
half of the 109 the Frame shows across. The helper measures the correction
itself (raw gaze to click), not the mouse's path; past the limit it isn't
learned and the helper sends "recheck" for the quick check, for the mouse and
keyboard alike. ft-gazed's own limits (8 and 25) follow the setting.

Test, our tracker's 409 clicks since its Sep 29 calibration: a one-dot check
set from any one of them puts the next 2 minutes' clicks within 15 degrees (99%
within 4.2) and the next 10 minutes' within 25, so it gets well under 55.

The panel's dot is still and its capture ring fills in quarters, so it's drawn
again only a few times per dot.

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

session/frametop.conf.example

@@ -29,7 +29,7 @@ POINTER_LEASH_RETURN=0.2   # head follow: once it comes along, how quickly (s) t
 POINTER_FOLLOW_REACH=70    # head follow: how far (degrees) from the middle of your view the mouse can move the cursor
 POINTER_GAZE=0             # 1 = the pointer goes where you look, the mouse does the last bit (needs the gaze service: gaze/run.sh install)
 POINTER_GAZE_RETAKE=5      # gaze mode: how far (degrees) you look away from the pointer before the gaze takes it back from the mouse
-POINTER_GAZE_NUDGE_MAX=15  # gaze mode: a correction up to this far (degrees) before a click is learned as the eye tracker's error; a bigger one with a keyboard click, or at the quick check, runs the quick check again
+POINTER_GAZE_NUDGE_MAX=55  # gaze mode: a correction up to this far (degrees) before a click is learned as the eye tracker's error; a bigger one runs the quick check (55: half the headset's view)
 POINTER_GAZE_HOLD=0.5      # gaze mode: a press held this long (s) without moving becomes a real press (to drag); moved or released sooner, it clicks where you let go
 POINTER_GAZE_DOT=always    # gaze mode: the dot shows all the time (always) | only while the mouse moves it (moving)
 POINTER_GAZE_SHOW=1        # gaze mode, with POINTER_GAZE_DOT=moving: the dot shows this long (s) after the mouse moves it; also while a press is held, and a pulse per click