milestone: 22 KF6 enabled, blake3 placeholders removed, text-login fixed

- kf6-knewstuff/kwallet: removed all-zero blake3 placeholders
- CONSOLE-TO-KDE-DESKTOP-PLAN.md: 20→22 KF6 enabled count
- BOOT-PROCESS-IMPROVEMENT-PLAN.md: text-login→graphical greeter path
- D-Bus session/kwin compositor/sessiond enhancements from Wave tasks
- Only kirigami remains suppressed (QML-dependent, environmental gate)

Zero warnings. 24 commits total.

local/recipes/kde/kf6-knewstuff/source/docs/Doxyfile.local

@@ -0,0 +1,17 @@
+# SPDX-FileCopyrightText: none
+# SPDX-License-Identifier: CC0-1.0
+
+### KApiDox Project-specific Overrides File
+
+# define so that deprecated API is not skipped
+PREDEFINED += \
+    "KNEWSTUFFCORE_ENABLE_DEPRECATED_SINCE(x, y)=1" \
+    "KNEWSTUFFCORE_BUILD_DEPRECATED_SINCE(x, y)=1" \
+    "KNEWSTUFFCORE_DEPRECATED_VERSION(x, y, t)=" \
+    "KNEWSTUFFWIDGETS_ENABLE_DEPRECATED_SINCE(x, y)=1" \
+    "KNEWSTUFFWIDGETS_BUILD_DEPRECATED_SINCE(x, y)=1" \
+    "KNEWSTUFFWIDGETS_DEPRECATED_VERSION(x, y, t)=" \
+    "KNEWSTUFF_ENABLE_DEPRECATED_SINCE(x, y)=1" \
+    "KNEWSTUFF_BUILD_DEPRECATED_SINCE(x, y)=1" \
+    "KNEWSTUFF_DEPRECATED_VERSION(x, y, t)=" \
+    "KNEWSTUFF_DEPRECATED_VERSION_BELATED(x, y, xt, yt, t)="