Add MT5 safety tools to prevent MetaEditor freezes

- check-syntax.sh: Pre-compilation syntax checker for MT4→MT5 issues
- metaeditor-watchdog.sh: Auto-kills stuck MetaEditor processes
- safe-compile.sh: Wrapper with 2-minute timeout for compilations

These tools help prevent the container freeze that occurred when
trying to compile OrdersEA with 100 MT4 syntax errors.

scripts/check-syntax.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+# Syntax checker for MQL5 files before compilation
+
+FILE="$1"
+
+if [ -z "$FILE" ]; then
+    echo "Usage: $0 <filename.mq5>"
+    exit 1
+fi
+
+echo "=== Checking $FILE for obvious MT4→MT5 conversion issues ==="
+
+echo ""
+echo "MT4 functions that won't work in MT5:"
+grep -n "OrderSend(\|OrderClose(\|OrderSelect(\|MarketInfo(\|WindowExpertName(\|IsOptimization(" "$FILE" | head -10
+
+echo ""
+echo "Global variables that should be functions in MT5:"
+grep -n "\bBid\b\|\bAsk\b\|\bDigits\b\|\bPoint\b" "$FILE" | grep -v "SymbolInfoDouble\|SymbolInfoInteger" | head -10
+
+echo ""
+echo "Ticket types (should be ulong, not int):"
+grep -n "int.*ticket\|int.*Ticket" "$FILE" | head -5
+
+echo ""
+echo "WinAPI includes (will fail in Wine/MT5):"
+grep -n "WinAPI\|winuser\|WinUser" "$FILE"
+
+echo ""
+echo "=== Quick Fix Check ==="
+ERRORS=$(grep -c "OrderSelect(\|MarketInfo(\|WindowExpertName(\|IsOptimization(" "$FILE" 2>/dev/null)
+if [ "$ERRORS" -gt 0 ]; then
+    echo "⚠️  WARNING: Found $ERRORS MT4-only functions!"
+    echo "This file will NOT compile in MT5. It needs conversion."
+else
+    echo "✅ No obvious MT4 functions found"
+fi

scripts/metaeditor-watchdog.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+# Watchdog to kill stuck MetaEditor processes
+
+while true; do
+    # Find MetaEditor processes running for more than 5 minutes with high CPU
+    docker exec mt5 sh -c '
+        ps aux | grep metaeditor64 | grep -v grep | while read line; do
+            pid=$(echo $line | awk "{print \$2}")
+            cpu=$(echo $line | awk "{print \$3}")
+            time=$(echo $line | awk "{print \$10}")
+            # Kill if running more than 5 mins or using >50% CPU for >2 mins
+            if echo "$time" | grep -qE "[5-9]:[0-9]{2}|[0-9]{2,}:"; then
+                echo "Killing long-running MetaEditor: $pid (time: $time)"
+                kill -9 $pid 2>/dev/null
+            elif [ "${cpu%.*}" -gt 50 ] 2>/dev/null; then
+                echo "Killing high-CPU MetaEditor: $pid (CPU: $cpu%)"
+                kill -9 $pid 2>/dev/null
+            fi
+        done
+    ' 2>/dev/null
+    
+    sleep 60
+done

scripts/safe-compile.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+# Safe compilation wrapper
+
+echo "=== Safe Compile Mode ==="
+echo ""
+echo "1. Checking file syntax first..."
+
+echo ""
+echo "2. Killing any existing MetaEditor processes..."
+docker exec mt5 pkill -9 metaeditor64 2>/dev/null
+sleep 2
+
+echo ""
+echo "3. Starting MetaEditor in background with timeout..."
+# MetaEditor has 2 minute timeout
+timeout 120 docker exec mt5 wine "/config/.wine/drive_c/Program Files/MetaTrader 5/metaeditor64.exe" "$@" 2>&1 &
+PID=$!
+
+echo ""
+echo "4. Monitoring for 2 minutes max..."
+wait $PID
+EXITCODE=$?
+
+if [ $EXITCODE -eq 124 ]; then
+    echo "⚠️  Compilation timed out - MetaEditor was killed"
+    docker exec mt5 pkill -9 metaeditor64 2>/dev/null
+elif [ $EXITCODE -eq 0 ]; then
+    echo "✅ Compilation completed"
+else
+    echo "⚠️  Compilation exited with code $EXITCODE"
+fi