[client] wayland: constrain pointer only during capture

Remove the persistent confined-pointer workaround that emulated cursor
warping on Wayland. Normal pointer motion now uses absolute input only.

Create relative and locked pointer objects only during capture. Preserve
the request across pointer capability changes, and suppress relative
events until the compositor confirms the lock.

On uncapture, publish the current absolute position instead of trying to
warp the host cursor.

client/displayservers/Wayland/wayland.h

@@ -123,7 +123,6 @@ struct WaylandHDRParameters
 
 struct WaylandDSState
 {
-  _Atomic(bool) confActive;
   _Atomic(bool) lockActive;
   bool          keyboardGrabbed;
   bool          pointerInSurface;
@@ -143,7 +142,6 @@ struct WaylandDSState
   bool fractionalScale;
   bool needsResize;
   bool configured;
-  bool warpSupport;
   struct WlMotion motion;
   double scrollState;
 
@@ -196,11 +194,8 @@ struct WaylandDSState
   struct zwp_relative_pointer_manager_v1 * relativePointerManager;
   struct zwp_pointer_constraints_v1 * pointerConstraints;
   struct zwp_relative_pointer_v1 * relativePointer;
-  struct zwp_confined_pointer_v1 * confinedPointer;
   struct zwp_locked_pointer_v1 * lockedPointer;
-  struct wl_callback * confSync;
-  bool confReq;
-  bool inputLive;
+  bool captureRequested;
   bool showPointer;
   uint32_t pointerEnterSerial;
 
@@ -392,7 +387,8 @@ bool waylandIsPointerGrabbed(void);
 bool waylandIsPointerCaptured(void);
 void waylandRealignPointer(void);
 void waylandWarpPointer(int x, int y, bool exiting);
-void waylandGuestPointerUpdated(double x, double y, double localX, double localY);
+void waylandGuestPointerUpdated(double x, double y, double localX,
+    double localY);
 bool waylandGetKeyLabel(int key, char * label, size_t size);
 // output module
 bool waylandOutputInit(void);