ft-pointer: without gaze mode, a pinch is a real press

Pressed when the pinch closes, released when it opens, its hand dragging
the pointer in between (at the pinch gain, past the dead zone), like the
mouse's button. That's what the gaze probe's Click practice needs: it
freezes its own gaze dot at the press and drags it by the pointer's
movement until the release. With gaze mode on, the pinch still holds the
press back and clicks on the release.

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

pointer/helper/ft-pointer.cpp

@@ -172,6 +172,11 @@
 // pinch point shifting as the fingers close stay inside it), at POINTER_PINCH_GAIN (0.5: half
 // the hand's angle, for precision). A correction is a lesson for the gaze tracker, as with the
 // mouse. A pinch ended by losing the hand (or by a grip taking over) doesn't click.
+//   Without gaze mode, a pinch is a real press instead, like the mouse's button: pressed when
+// it closes and released when it opens, and held, its hand drags the pointer (at the same gain
+// and past the same dead zone). A tap is still a click where the pointer is. That's what the
+// gaze probe's Click practice wants: it has its own gaze dot, frozen by the press and dragged
+// by the pointer's movement until the release.
 //   A grip (closing the hand) is a press and drag: the press where the pointer is, then the
 // hand moves the pointer at POINTER_GRIP_GAIN (1: as far as it moves, seen from the eye), and
 // opening the hand releases. So it drags whatever the pointer is on: a title bar moves the
@@ -807,6 +812,7 @@ int main() {
         int side = -1;
         bool grip = false, engaged = false;
         Vec3 origin;
+        bool pressed = false;  // a real press went out (a grip, or a pinch without gaze mode)
         double refYaw = 0, refPitch = 0, startYaw = 0, startPitch = 0, lastYaw = 0, lastPitch = 0;
     } hold;
     uint32_t seenBegins[2][2] = {}, seenEnds[2][2] = {};  // [pinch, grip][side], as last read
@@ -1377,7 +1383,7 @@ int main() {
             return true;
         };
         auto endHold = [&](bool lost) {
-            if (hold.grip) {
+            if (hold.pressed) {
                 if (leftHeld) releaseLeft();
             } else if (aimHeld) {
                 aimHeld = aimHand = false;
@@ -1420,8 +1426,10 @@ int main() {
             hold = {side, grip, false, Position(head)};
             if (!handAngles(g.begin_point, g.begin_ns, hold.origin, hold.refYaw, hold.refPitch)) return void(hold.side = -1);
             hold.startYaw = yaw, hold.startPitch = pitch;
-            if (grip) {
-                // A press and drag where the pointer is (where you look, in gaze mode).
+            // A grip, or a pinch without gaze mode: a real press where the pointer is (where
+            // you look, in gaze mode), dragging with the hand until it opens.
+            hold.pressed = grip || !gazeOn;
+            if (hold.pressed) {
                 gazeBack = gazeOn && gazeOwns;
                 pressLeft();
             } else {