feat(config): auto-load GITHUB_TOKEN and add obscura skill source

dot_zshrc

@@ -33,6 +33,14 @@ for _adir in "$ANDROID_HOME/platform-tools" "$ANDROID_HOME/cmdline-tools/latest/
 done
 unset _adir
 
+# GITHUB_TOKEN from gh's keyring login — never stored on disk. An inherited
+# value wins, so nested shells skip the gh call.
+if [ -z "${GITHUB_TOKEN:-}" ] && command -v gh >/dev/null 2>&1; then
+    _gh_token="$(gh auth token 2>/dev/null)"
+    [ -n "$_gh_token" ] && export GITHUB_TOKEN="$_gh_token"
+    unset _gh_token
+fi
+
 # Shared aliases (same set as fish/bash; source of truth: .chezmoidata/aliases.yaml)
 [ -f "$HOME/.config/shell/aliases.sh" ] && . "$HOME/.config/shell/aliases.sh"