fix(zsh): harden shell bootstrap and XDG path setup

zsh/.config/zsh/.gitignore

@@ -2,3 +2,4 @@
 .zsh_history
 .zcompcache/
 .zsh_sessions/
+config/secrets.zsh

zsh/.config/zsh/.zshrc

@@ -1,5 +1,8 @@
 # install zinit
-source $ZDOTDIR/zinit.zsh
+if ! source "$ZDOTDIR/zinit.zsh"; then
+    print -u2 "zinit: failed to initialize; skipping plugin configuration"
+    return 1
+fi
 
 zinit light zdharma-continuum/zinit-annex-bin-gem-node
 zinit light zdharma-continuum/zinit-annex-binary-symlink

zsh/.config/zsh/config/bin.zsh

@@ -1,9 +1,11 @@
 #!/usr/bin/env zsh
 
-# Define a marker file (choose a location in your cache or temp directory)
-MARKER_FILE="${XDG_CACHE_HOME:-$HOME/.cache}/gnu_tools_symlinked"
+local brew_prefix="${HOMEBREW_PREFIX:-}"
+if [[ -z "$brew_prefix" ]] && command -v brew >/dev/null 2>&1; then
+    brew_prefix="$(brew --prefix 2>/dev/null)"
+fi
 
-if [[ ! -f "$MARKER_FILE" ]]; then
+if [[ -n "$brew_prefix" ]]; then
     gnu_tools=(
         "coreutils"
         "findutils"
@@ -14,23 +16,22 @@ if [[ ! -f "$MARKER_FILE" ]]; then
         "grep"
     )
 
-    for tool in $gnu_tools; do
-        gnubin="/opt/homebrew/opt/$tool/libexec/gnubin"
-        if [[ -d "$gnubin" ]]; then
-            for bin in "$gnubin"/*(N); do
-                ln -sf "$bin" "$XDG_BIN_HOME/$(basename "$bin")"
-            done
-        fi
-    done
-
-    # Create the marker file to indicate the script has run
-    touch "$MARKER_FILE"
+    if mkdir -p "$XDG_BIN_HOME"; then
+        for tool in $gnu_tools; do
+            gnubin="$brew_prefix/opt/$tool/libexec/gnubin"
+            if [[ -d "$gnubin" ]]; then
+                for bin in "$gnubin"/*(N); do
+                    target="$XDG_BIN_HOME/${bin:t}"
+                    [[ "$target" -ef "$bin" ]] || ln -sf "$bin" "$target"
+                done
+            fi
+        done
+    fi
 fi
 
-
 local bin_paths=(
     "$XDG_BIN_HOME"
-    "/opt/homebrew/opt/gnu-getopt/bin"
+    "${brew_prefix:+$brew_prefix/opt/gnu-getopt/bin}"
 )
 for bin_path in "${bin_paths[@]}"; do
     if [[ -d "$bin_path" ]]; then

zsh/.config/zsh/config/default.zsh

@@ -8,9 +8,13 @@ export VISUAL="micro"
 export SUDO_EDITOR="micro"
 
 export STARSHIP_CONFIG="$XDG_CONFIG_HOME"/starship/starship.toml
+export OPENCODE_EXPERIMENTAL_BACKGROUND_SUBAGENTS=true
 
 export PNPM_HOME="$HOME/.local/share/pnpm"
-case ":$PATH:" in
-  *":$PNPM_HOME/bin:"*) ;;
-  *) path=("$PNPM_HOME/bin" $path) ;;
-esac
+
+typeset -U path
+path=(
+  "$HOME/.opencode/bin"
+  "$PNPM_HOME/bin"
+  $path
+)

zsh/.config/zsh/zinit.zsh

@@ -1,8 +1,15 @@
 #!/usr/bin/env zsh
 
 ZINIT_HOME="${XDG_DATA_HOME:-${HOME}/.local/share}/zinit/zinit.git"
-[[ ! -d "$ZINIT_HOME" ]] && mkdir -p "$(dirname "$ZINIT_HOME")"
-[[ ! -d "$ZINIT_HOME/.git" ]] && git clone --depth 1 https://github.com/zdharma-continuum/zinit.git "$ZINIT_HOME"
+if [[ ! -d "$ZINIT_HOME/.git" ]]; then
+    mkdir -p "$(dirname "$ZINIT_HOME")" || return 1
+    git clone --depth 1 https://github.com/zdharma-continuum/zinit.git "$ZINIT_HOME" || return 1
+fi
+
+if [[ ! -r "$ZINIT_HOME/zinit.zsh" ]]; then
+    print -u2 "zinit: bootstrap is incomplete at $ZINIT_HOME"
+    return 1
+fi
 
 # not to use aliases: zi or zini
 typeset -A ZINIT