fix: add migration shim to Menu and Diagnose scripts

Mac-Menu, Mac-Diagnose, and Windows-Diagnose were missing the
core-mac/core-win → core migration shim, causing them to fail
on existing USB drives that still have the old directory name.

portable/Mac-Diagnose.command

@@ -49,6 +49,11 @@ else
     echo -e "  ${RED}✗${NC} Node.js: NOT FOUND"
 fi
 
+# Migration shim: rename old core-mac to core for existing USB users
+if [ -d "$UCLAW_DIR/app/core-mac" ] && [ ! -d "$UCLAW_DIR/app/core" ]; then
+    mv "$UCLAW_DIR/app/core-mac" "$UCLAW_DIR/app/core"
+fi
+
 # 2. Check core directory
 echo "[2/6] Checking core directory..."
 CORE_DIR="$UCLAW_DIR/app/core"

portable/Mac-Menu.command

@@ -4,6 +4,12 @@
 
 UCLAW_DIR="$(cd "$(dirname "$0")" && pwd)"
 APP_DIR="$UCLAW_DIR/app"
+
+# Migration shim: rename old core-mac to core for existing USB users
+if [ -d "$APP_DIR/core-mac" ] && [ ! -d "$APP_DIR/core" ]; then
+    mv "$APP_DIR/core-mac" "$APP_DIR/core"
+fi
+
 CORE_DIR="$APP_DIR/core"
 DATA_DIR="$UCLAW_DIR/data"
 STATE_DIR="$DATA_DIR/.openclaw"

portable/Windows-Diagnose.bat

@@ -35,6 +35,9 @@ if exist "%NODE_BIN%" (
     set /a ERROR_COUNT+=1
 )
 
+REM Migration shim: rename old core-win to core for existing USB users
+if exist "%UCLAW_DIR%app\core-win" if not exist "%UCLAW_DIR%app\core" ren "%UCLAW_DIR%app\core-win" core
+
 REM 2. Check core directory
 echo [2/6] 检查 Windows 依赖目录...
 set "CORE_DIR=%UCLAW_DIR%app\core"