refactor(install): restore fresh-install flow, drop transform.sh and personas

Long-standing gaps in post-install.sh plus cleanup:

- post-install.sh:18 was `sudo pacman -S paru` on the wrong
  assumption paru had landed in [extra]. Verified: paru/paru-bin
  are AUR-only. Restored the original git-clone + makepkg
  bootstrap, added the rust buildep that archinstall does not
  pull in.
- post-install.sh never installed AUR extras — walker, elephant,
  waypaper, stasis, themes all silently skipped. Now pulls
  packages/aur.txt after moonarch-git.
- packages/official.txt: drop glab, go, npm (unused) and rustup
  (only needed for the paru build, handled imperatively now).
- packages/aur.txt: add walker-bin (was missing entirely).
- transform.sh + legacy update.sh shim removed — transform was
  never used in practice.
- Apollo persona block out of CLAUDE.md, prior DECISIONS entries
  rewritten from Apollo/Ragnar to ClaudeCode.
- README Transform section and scripts/ listing trimmed.
- lib.sh ABOUTME updated — only post-install.sh sources it now.

README.md

@@ -54,35 +54,6 @@ The archinstall config clones this repo to `/opt/moonarch` via custom-commands.
 post-install.sh handles the remaining ~95 packages, all configs, themes, services,
 and user setup.
 
-### Transform (Existing Arch+Wayland System)
-
-Already running Arch with a Wayland compositor (Sway, Hyprland, GNOME Wayland, etc.)?
-Transform converts your system to Moonarch without reinstalling.
-
-**Prerequisites:** Active Wayland session, git installed.
-
-```bash
-# Clone the repo
-sudo git clone https://gitea.moonarch.de/nevaforget/moonarch.git /opt/moonarch
-
-# Preview what will happen (no changes made)
-/opt/moonarch/scripts/transform.sh --dry-run
-
-# Run the transform
-/opt/moonarch/scripts/transform.sh
-
-# Reboot (do NOT log out — your previous DM is already disabled)
-sudo reboot
-```
-
-The script will:
-1. Show a pre-flight summary (package diff, config changes, detected conflicts)
-2. Back up your `~/.config/`, `~/.zshrc`, and `/etc/xdg/` to timestamped tar archives
-3. Disable conflicting display managers (SDDM, GDM, LightDM, etc.)
-4. Remove conflicting packages (e.g. PulseAudio → PipeWire)
-5. Install all Moonarch packages and configs (**hard overwrite** of most user configs; kanshi display profiles are preserved)
-6. Enable greetd, firewall, and system services
-
 ### Update
 
 ```bash
@@ -114,9 +85,8 @@ packages/
   aur.txt                       AUR packages (~20), one per line
 
 scripts/
-  lib.sh                        Shared helpers sourced by all scripts
+  lib.sh                        Shared helpers sourced by post-install.sh
   post-install.sh               Main automation (packages, configs, themes, services)
-  transform.sh                  Convert existing Arch+Wayland system to Moonarch
   moonarch-update               Interactive updater (deployed to /usr/bin/ as moonup)
   moonarch-doctor               System health checker (deployed to /usr/bin/ as moondoc)