docs(readme): update graphics stack status for Round 4 (winsys crtc_id, null+8 fix)

README.md

@@ -130,8 +130,9 @@ successfully on branch `0.3.1`. Graphics packages are frozen at latest upstream
 | POSIX gaps (relibc) | 🟡 ~85% coverage; PATCHED-VIA-PATH-FORK — relibc changes are committed directly to `local/sources/relibc/`; `local/patches/relibc/` holds reference and archived patches only |
 | DRM/KMS display drivers | 🟡 AMD + Intel + virtio-gpu compile; HW validation open |
 | Mesa — llvmpipe + virgl | ✅ Builds; EGL platform real, virgl auto-probe wired (DRM_IOCTL_VERSION major=0 + name + PCI info) |
-| Mesa redox gallium winsys | ✅ Source landed; meson wires it on iris/radeonsi; compile unverified in current canonical build |
+| Mesa redox gallium winsys | ✅ Source landed; BO byte count now correct; per-surface crtc_id tracking via redox_drm_surface_set_crtc; meson wires it on iris/radeonsi; compile unverified in current canonical build |
 | 3D userland (iris / radeonsi / Vulkan) | 🟡 Recipe enabled; configure failed on libclc — now fixed (libclc in deps); needs canonical `build-redbear.sh redbear-full` to validate | Comprehensive plan in `local/docs/3D-DRIVER-PLAN.md` |
+| Qt6 Wayland null+8 | ✅ Comprehensive null guards in qtwaylandscanner (init_listener wrap) and libwayland (all wl_proxy_* entry points) | Detailed in `local/docs/QT6-WAYLAND-NULL8-DIAGNOSIS.md` |
 | SDDM display manager + Greeter/Login | ✅ Built; service + PAM + kde-wayland.desktop + greeter user all in `redbear-full.toml`; runtime proof needs canonical build |
 | Qt 6.11.1 (Core, Gui, DBus, Wayland) | 🟡 Builds; Wayland `null+8` statically diagnosed; needs isolated runtime fix |
 | KF6 Frameworks — 40/40 | 🟡 All frameworks build; KWin cooks successfully |