fix: bind 0.0.0.0 by default so remote devices can access OCM

- server.listen was hardcoded to 127.0.0.1, causing ERR_CONNECTION_REFUSED on remote access
- Default to 0.0.0.0, add --host flag to override (e.g. --host 127.0.0.1 for local-only)
- Show LAN IP in startup log for easy remote access
- Startup log and error messages switched to English
- Bump version to v0.5.2

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

start.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 # ================================================================
-# OpenClaw Manager v0.5.1 — 跨平台启动脚本 (macOS / Linux)
+# OpenClaw Manager v0.5.2 — 跨平台启动脚本 (macOS / Linux)
 #
 # 特性：
 #   • 自动检测 Node.js，未安装时给出安装指引
@@ -22,7 +22,7 @@ CYAN='\033[0;36m'; BOLD='\033[1m'; DIM='\033[2m'; RESET='\033[0m'
 
 banner() {
   echo ""
-  echo -e "${CYAN}${BOLD}  🦀 OpenClaw Manager v0.5.1${RESET}"
+  echo -e "${CYAN}${BOLD}  🦀 OpenClaw Manager v0.5.2${RESET}"
   echo -e "${DIM}  ─────────────────────────────${RESET}"
   echo ""
 }