Pointer: a release never wakes the pointer

Any "btn" or "scroll" from the relay woke a pointer that was off. When
Frametop pauses for a game, the relay's stand_down sends the releases of
the clicks held into the pause, and with its pointer already off (the
idle timeout or pointer_toggle during a press) it used to send them with
no "hide" after. The helper woke on them, connected the virtual
controller and took the right hand role during the game.

Now a button release or a scroll back to 0 0 doesn't wake it. The
release is still handled as before (it ends its press, or goes to the
driver), so the driver doesn't reconnect later with the button down.
Outside a pause this changes one case: a mouse button let go after a
moving controller released the pointer mid-press. That release used to
reconnect the controller, recenter it and release there; now it updates
the disconnected controller, and ft-screens still gets its "up".

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

pointer/helper/ft-pointer.cpp

@@ -1563,8 +1563,19 @@ int main() {
             // (Moves were taken first, above.)
             const bool mouseInput = std::strncmp(buf, "btn", 3) == 0 || std::strncmp(buf, "scroll", 6) == 0;
             if (mouseInput) lastMouse = Clock::now();
-            // Any mouse input wakes the pointer (after a controller took over, or a helper restart).
-            if (!active && mouseInput) wake(Clock::now());
+            // Mouse input wakes the pointer (after a controller took over, or a helper restart),
+            // but a release doesn't (a button up, a scroll back to 0 0): the relay sends those with
+            // the pointer off when Frametop pauses for a game (input-relay.py stand_down), and
+            // waking would connect the virtual controller during the game. The release is still
+            // handled below (it ends its press, or goes to the driver), so no button stays down.
+            {
+                char name[16];
+                int v = 1;
+                double sx = 1, sy = 1;
+                const bool release = (std::sscanf(buf, "btn %15s %d", name, &v) == 2 && v == 0) ||
+                                     (std::sscanf(buf, "scroll %lf %lf", &sx, &sy) == 2 && sx == 0 && sy == 0);
+                if (!active && mouseInput && !release) wake(Clock::now());
+            }
             char key[128];
             double px, py, pz, pyaw, ppitch, proll = 0, pgrab = -1;
             if (std::sscanf(buf, "grabprobe %127s", key) == 1) {