docs: final stale reference cleanup — all dead doc links removed

Fixed remaining Oracle-found issues:
- docs/AGENTS.md: RELIBC-COMPLETENESS → CONSOLE-TO-KDE,
  RELIBC-IMPLEMENTATION → KERNEL-IPC-CREDENTIAL
- docs/07: QT6-PORT-STATUS + DESKTOP-STACK → CONSOLE-TO-KDE
- CONSOLE-TO-KDE: KWin status updated (no longer has wrapper
  scripts; redbear-compositor provides kwin_wayland separately)

All 13 deleted docs now have zero references in canonical docs.

docs/AGENTS.md

@@ -36,7 +36,7 @@ docs/
 | How do drivers access hardware? | 01 | §3 Driver Model, §6 Build System |
 | What is the canonical current implementation plan? | 07 | Entire document |
 | Which docs are current vs historical? | README | Document Status Matrix |
-| What is the current WIP ownership policy? | `local/docs/RELIBC-COMPLETENESS-AND-ENHANCEMENT-PLAN.md` | Phase R1 |
+| What is the current WIP ownership policy? | `local/docs/CONSOLE-TO-KDE-DESKTOP-PLAN.md` | Current state and blocker map |
 | What do the main sync/fetch/apply/build scripts actually guarantee? | local/docs/SCRIPT-BEHAVIOR-MATRIX.md | Entire document |
 | What is the current desktop-stack truth? | `local/docs/CONSOLE-TO-KDE-DESKTOP-PLAN.md` | Entire document |
 | What is the current Wi-Fi architecture and validation path? | local/docs/WIFI-IMPLEMENTATION-PLAN.md | Entire document |
@@ -50,7 +50,7 @@ docs/
 | How to port KDE Plasma? | 05 | Phase KDE-C (KWin, Plasma Shell, session config) |
 | How to set up the build? | 06 | Prerequisites per distro, build commands |
 | What is the current work ordering? | 07 | Workstream Order + Blocker chain |
-| How to fix POSIX gaps in relibc? | local/docs/RELIBC-IMPLEMENTATION-PLAN.md | Gap inventory + implementation phases |
+| How to fix POSIX gaps in relibc? | `local/docs/KERNEL-IPC-CREDENTIAL-PLAN.md` | Implemented credential syscalls |
 
 ## READING RULE