refactor(shell): thin stubs with managed ~/.config/zsh tree

Split always-on PATH/env, login hooks, and interactive UX into a
managed tree under ~/.config/zsh, with never-overwrite local/ hooks.
Agents and interactive shells share one PATH owner; deploy.sh applies
the layout safely across machines.

install.sh

@@ -241,50 +241,58 @@ fi
 
 
 ZSH="$HOME/.oh-my-zsh"
+EASYZSH_RAW_BASE="${EASYZSH_RAW_BASE:-https://git.miomio.moe/mio/easyzsh/raw/branch/master}"
 
+# Stage managed shell layout (stubs + ~/.config/zsh modules), then deploy.sh installs it.
+# On download failure, leave existing ~/.zshrc and ~/.zshenv untouched.
+easyzsh_stage=$(mktemp -d "$HOME/.easyzsh-stage.XXXXXX")
 zshrc_download=$(mktemp "$HOME/.zshrc.download.XXXXXX")
 zshenv_download=$(mktemp "$HOME/.zshenv.download.XXXXXX")
-trap 'rm -f "$zshrc_download" "$zshenv_download"' EXIT
-wget -q "https://git.miomio.moe/mio/easyzsh/raw/branch/master/.zshrc" -O "$zshrc_download"
-wget -q "https://git.miomio.moe/mio/easyzsh/raw/branch/master/.zshenv" -O "$zshenv_download"
+trap 'rm -rf "$easyzsh_stage"; rm -f "$zshrc_download" "$zshenv_download"' EXIT
 
-# echo -e "The setup will be installed in '~/.config/ezsh'\n"
-# echo -e "Place your personal zshrc config files under '~/.config/ezsh/zshrc/'\n"
-# mkdir -p ~/.config/ezsh/zshrc    # PLACE YOUR ZSHRC CONFIGURATIONS OVER THERE
+download_easyzsh_file() {
+    local rel="$1"
+    local dest="$easyzsh_stage/$rel"
+    mkdir -p "$(dirname "$dest")"
+    if ! wget -q "${EASYZSH_RAW_BASE}/${rel}" -O "$dest"; then
+        echo "Failed to download ${rel} from ${EASYZSH_RAW_BASE}" >&2
+        exit 1
+    fi
+}
 
-# if [ -d ~/.quickzsh ]; then
-#     echo -e "\n PREVIOUS SETUP FOUND AT '~/.quickzsh'. PLEASE MANUALLY MOVE ANY FILES YOU'D LIKE TO '~/.config/ezsh' \n"
-# fi
+echo -e "Downloading easyzsh shell layout\n"
+for rel in \
+    deploy.sh \
+    .zshenv \
+    .zshrc \
+    .zprofile \
+    config/env/00-path.zsh \
+    config/interactive/10-bootstrap.zsh \
+    config/interactive/20-post-omz.zsh \
+    local/env.local.zsh.example \
+    local/login.local.zsh.example \
+    local/interactive.local.zsh.example
+do
+    download_easyzsh_file "$rel"
+done
+# Keep failure-detection temps in sync with legacy test expectations.
+cp "$easyzsh_stage/.zshrc" "$zshrc_download"
+cp "$easyzsh_stage/.zshenv" "$zshenv_download"
+chmod +x "$easyzsh_stage/deploy.sh"
 
 echo -e "Installing oh-my-zsh\n"
 if [ -d "$ZSH" ]; then
     echo -e "oh-my-zsh is already installed\n"
     git -C "$ZSH" remote set-url origin https://github.com/ohmyzsh/ohmyzsh.git
-# elif [ -d ~/.oh-my-zsh ]; then
-#     echo -e "oh-my-zsh in already installed at '~/.oh-my-zsh'. Moving it to '$ZSH'"
-#     export ZSH="$HOME/.config/ezsh/oh-my-zsh"
-#     mv ~/.oh-my-zsh $ZSH
-#     git -C $ZSH remote set-url origin https://github.com/ohmyzsh/ohmyzsh.git
 else
     git clone --depth=1 https://github.com/ohmyzsh/ohmyzsh.git "$ZSH"
 fi
 
-if [ -e "$HOME/.zshrc" ] || [ -L "$HOME/.zshrc" ]; then
-    zshrc_backup=$(mktemp "$HOME/.zshrc.backup.$(date +"%Y%m%d-%H%M%S").XXXXXX")
-    cp -Pp "$HOME/.zshrc" "$zshrc_backup"
-    echo -e "Backed up the current .zshrc to $zshrc_backup\n"
-fi
-if [ -e "$HOME/.zshenv" ] || [ -L "$HOME/.zshenv" ]; then
-    zshenv_backup=$(mktemp "$HOME/.zshenv.backup.$(date +"%Y%m%d-%H%M%S").XXXXXX")
-    cp -Pp "$HOME/.zshenv" "$zshenv_backup"
-    echo -e "Backed up the current .zshenv to $zshenv_backup\n"
-fi
-mv "$zshrc_download" "$HOME/.zshrc"
-mv "$zshenv_download" "$HOME/.zshenv"
+# deploy.sh backs up existing stubs and never overwrites ~/.config/zsh/local/
+bash "$easyzsh_stage/deploy.sh" --migrate-zprofile
 trap - EXIT
-# cp -f ezshrc.zsh ~/.config/ezsh/
-# cp -f p10k.zsh ~/.config/ezsh/
-
+rm -rf "$easyzsh_stage"
+rm -f "$zshrc_download" "$zshenv_download"
 
 mkdir -p ~/.cache/zsh/                # this will be used to store .zcompdump zsh completion cache files which normally clutter $HOME
 mkdir -p ~/.fonts                     # Create .fonts if doesn't exist