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/export.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+for i in *.dia; do echo $i; dia --export=$i.png --filter=png --nosplash $i; done
+
+#for i in *.dia; do echo $i; dia --export=$i.png --export-to-format=png --nosplash $i; done
+