chore: v2.8.13 — Artifacts reinstall/edit/installs, agent steps in chat, pick a local file to attach, Windows paths as links

- Chat: an Agent step shows its task, status and tool calls and opens its conversation in place; Windows paths (E:\…, C:/…) in replies open as files
- Prompt: attach a file on this computer by path (native picker), clearer too-large messages
- Artifacts: edit title/description and a skill's files (new snapshot), Reinstall, install history, Hub-only rows, skills installed into ~/.claude/skills and ~/.agents/skills
- Files: batch upload of small files in one extract
- AI Tools: npm install falls back to --prefix ~/.local when the global prefix is not writable

scripts/server/write-as.sh

@@ -21,10 +21,13 @@
 #   copy     the path, recursively, to the 3rd argument (symlinks copied as
 #            links, never followed; mode and times kept; never onto an
 #            existing name)
+#   extract  a tar on stdin unpacked into the directory (the dashboard's
+#            batch upload, a tar it wrote itself: folders and regular files
+#            only); an existing file is never replaced (`-k` fails instead)
 # @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
 set -eu
 usage() {
-  echo "usage: write-as <absolute path> [append|replace|private|mkdir|remove] | <path> move|copy <absolute dest>" >&2
+  echo "usage: write-as <absolute path> [append|replace|private|mkdir|remove|extract] | <path> move|copy <absolute dest>" >&2
   exit 2
 }
 case "${2:-}" in
@@ -48,6 +51,7 @@ case "${2:-}" in
   private) swap "$1" 0600 ;;
   mkdir) exec mkdir -p -m 0755 -- "$1" ;;
   remove) exec rm -rf -- "$1" ;;
+  extract) exec tar -x -k -p --no-same-owner -f - -C "$1" ;;
   move)
     [ -e "$3" ] || [ -L "$3" ] && { echo "write-as: $3 exists" >&2; exit 1; }
     exec mv -T -- "$1" "$3" ;;