docs: align with Round 7 reality and clean stale references

* local/AGENTS.md (lines 1418-1423): replace the 3 references to
  deleted files (AMD-FIRST-INTEGRATION.md, HARDWARE-3D-ASSESSMENT.md,
  DMA-BUF-IMPROVEMENT-PLAN.md) with a pointer to the canonical plans
  (local/docs/3D-DRIVER-PLAN.md, local/docs/CONSOLE-TO-KDE-DESKTOP-PLAN.md).
* local/docs/CONSOLE-TO-KDE-DESKTOP-PLAN.md (line 2067-2074): annotate
  IRQ-AND-LOWLEVEL-CONTROLLERS-ENHANCEMENT-PLAN.md and
  DRM-MODERNIZATION-EXECUTION-PLAN.md as moved to
  legacy-obsolete-2026-07-25/; add 3D-DRIVER-PLAN.md to the subsystem
  table as the canonical Mesa/virgl/Intel/AMD plan.
* local/docs/REDBEAR-FULL-SDDM-BRINGUP.md: add Round 5 note
  documenting the real-XAuth rewrite of wayland-patch.sh (the prior
  sed-stub characterization is now stale).
* local/docs/WAYLAND-IMPLEMENTATION-PLAN.md: prepend a header note
  marking the status table superseded by 3D-DRIVER-PLAN.md Rounds 1-7
  while preserving the diagnostic content (\u00a71-2 evidence chain).

local/AGENTS.md

@@ -1415,12 +1415,11 @@ When mainline updates affect our work:
 - `local/docs/legacy-obsolete-2026-07-25/DRM-MODERNIZATION-EXECUTION-PLAN.md` is the current DRM-focused execution plan beneath
   the canonical desktop path. It keeps Intel and AMD at the same evidence bar while separating
   display/KMS maturity from render/3D maturity.
-- Older GPU-specific docs such as `local/docs/AMD-FIRST-INTEGRATION.md`,
-  `local/docs/HARDWARE-3D-ASSESSMENT.md`, and `local/docs/DMA-BUF-IMPROVEMENT-PLAN.md` remain
-  useful reference material, but they are not the planning authority when sequencing or acceptance
-  criteria differ.
-- `local/docs/AMD-FIRST-INTEGRATION.md` remains the deeper AMD-specific technical roadmap, but AMD
-  and Intel machines are now equal-priority Red Bear OS targets.
+- The historical `local/docs/AMD-FIRST-INTEGRATION.md`, `local/docs/HARDWARE-3D-ASSESSMENT.md`,
+  and `local/docs/DMA-BUF-IMPROVEMENT-PLAN.md` were deleted (per CONSOLE-TO-KDE-DESKTOP-PLAN.md §10).
+  AMD and Intel machines are equal-priority Red Bear OS targets. The current canonical 3D driver
+  plan is `local/docs/3D-DRIVER-PLAN.md`; the canonical desktop path plan is
+  `local/docs/CONSOLE-TO-KDE-DESKTOP-PLAN.md`.
 - The earlier Phase 0–3 reassessment bridge has been retired. Its reconciliation role is now
   covered by `local/docs/CONSOLE-TO-KDE-DESKTOP-PLAN.md` and
   `docs/07-RED-BEAR-OS-IMPLEMENTATION-PLAN.md`.

local/docs/REDBEAR-FULL-SDDM-BRINGUP.md

@@ -38,6 +38,15 @@ dual-stage helper), sddm VirtualTerminal + utmpx stubs, kf6-solid QSystemSemapho
 guard, kf6-kwindowsystem Wayland-plugin disable, mesa patch-path linking, stale
 6.11.0 source.tar purge. See git log + [[qt-redox-build-iteration-gotchas]].
 
+> **Round 5 update (per `local/docs/3D-DRIVER-PLAN.md` §12):** The SDDM
+> `wayland-patch.sh` was rewritten. The prior sed-stub approach for XAuth.cpp
+> was replaced with a real `XAuth` implementation that reads / writes the
+> `.Xauthority` file using the standard X11 on-disk format via relibc's
+> `<X11/Xauth.h>` (added in Round 1). Only the XorgDisplayServer /
+> XorgUserDisplayServer classes remain stubbed (no real X server in this
+> build). The current `recipes/kde/sddm/wayland-patch.sh` is a real Wayland-only
+> port, not a sed hack.
+
 ## Component homes
 - `redox-drm` (DRM provider, `/scheme/drm/card0`): `local/recipes/gpu/redox-drm/` — cargo. Built-in AMD+Intel+VirtIO KMS drivers; ioctl ABI matches KWin + redbear-compositor.
 - `mesa` (EGL/GBM/llvmpipe): `local/recipes/libs/mesa/` (26.1.4) + `local/patches/mesa/`.