fix: correct /home/node/.config permissions and enable plugin marketplace writes

Fixed two permission issues:
1. /home/node/.config owned by root:0 → now chowned to node:node by entrypoint
2. Plugin marketplaces mounted as :ro → changed to :rw to allow plugin installs

Root causes:
- entrypoint.sh only fixed permissions for .claude/.local/.agents/go/.cache
- opencode failed with EACCES when trying to create ~/.config/opencode
- Claude Code /plugin failed with "Read-only file system" for marketplace clones

Changes:
- docker-entrypoint.sh: Add /home/node/.config to permission fix loop
- docker-compose.yml: Change plugin mounts from :ro to :rw

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: 黄飞虹

docker-compose.yml

@@ -138,8 +138,8 @@ services:
       - ${HOME:-${USERPROFILE:-/tmp}}/.claude/settings.json:/home/node/.claude/settings.json:ro
       - ${HOME:-${USERPROFILE:-/tmp}}/.claude/skills:/home/node/.claude/skills:ro
       # Plugin marketplaces (覆盖 Layer 2 命名卷中的同名路径)
-      - ${HOME:-${USERPROFILE:-/tmp}}/.claude/plugins/known_marketplaces.json:/home/node/.claude/plugins/known_marketplaces.json:ro
-      - ${HOME:-${USERPROFILE:-/tmp}}/.claude/plugins/marketplaces:/home/node/.claude/plugins/marketplaces:ro
+      - ${HOME:-${USERPROFILE:-/tmp}}/.claude/plugins/known_marketplaces.json:/home/node/.claude/plugins/known_marketplaces.json:rw
+      - ${HOME:-${USERPROFILE:-/tmp}}/.claude/plugins/marketplaces:/home/node/.claude/plugins/marketplaces:rw
       # .agents/skills 只读共享
       - ${HOME:-${USERPROFILE:-/tmp}}/.agents/skills:/home/node/.agents/skills:ro
       # ClawHub CLI 凭据 (跨平台: macOS/Linux/Windows)

docker-entrypoint.sh

@@ -76,7 +76,7 @@ if [[ "$(id -u)" = "0" ]]; then
 
     # Named volume directories: create if missing, then incremental fix
     # Note: /home/node/.global is NOT included - Dockerfile:106 already handles it
-    for dir in "/home/node/.claude" "/home/node/.local" "/home/node/.agents" "/home/node/go" "/home/node/.cache"; do
+    for dir in "/home/node/.claude" "/home/node/.local" "/home/node/.agents" "/home/node/go" "/home/node/.cache" "/home/node/.config"; do
         if [[ ! -d "${dir}" ]]; then
             mkdir -p "${dir}"
             # New directory: set ownership directly (no need to traverse)