Add Proxmox compatibility detection and warning

- Created PROXMOX_COMPATIBILITY.md with detailed analysis
- Added check_proxmox() function to detect Proxmox VE hosts
- Shows warning about potential issues (RAM allocation, kernel params)
- Allows user to continue or abort
- Updated README.md with Proxmox warning
- Recommends running inside VMs instead of on host

Key concerns on Proxmox host:
- zram reduces RAM available for VMs
- tmpfs allocates up to 40% of RAM
- Desktop kernel parameters not optimal for hypervisor
- Safe to use: inside VMs or monitoring scripts only

one-button-optimizer.sh

@@ -42,6 +42,36 @@ check_root() {
     fi
 }
 
+check_proxmox() {
+    # Detect if running on Proxmox host
+    if [[ -f /etc/pve/.version ]] || [[ -d /etc/pve ]] || pveversion &>/dev/null; then
+        warn "⚠️  Proxmox VE host detected!"
+        echo ""
+        echo "This tool is designed for desktop Linux systems and may not be"
+        echo "suitable for Proxmox hosts. Key concerns:"
+        echo ""
+        echo "  🔴 zram: Reduces RAM available for VMs"
+        echo "  🟡 tmpfs: Allocates significant memory (up to 40%)"
+        echo "  🟡 Kernel params: Tuned for desktop, not hypervisor"
+        echo ""
+        echo "📖 See PROXMOX_COMPATIBILITY.md for detailed analysis"
+        echo ""
+        echo "Recommendations:"
+        echo "  ✅ Run inside desktop VMs (fully safe)"
+        echo "  ⚠️  Run on Proxmox host (may affect VM performance)"
+        echo "  📊 Monitoring scripts are always safe"
+        echo ""
+        read -p "Continue anyway? (y/N): " -n 1 -r
+        echo
+        if [[ ! $REPLY =~ ^[Yy]$ ]]; then
+            log "Aborted by user. Consider running inside VMs instead."
+            exit 0
+        fi
+        warn "Proceeding on Proxmox host - monitor VM performance carefully!"
+        echo ""
+    fi
+}
+
 analyze_and_prompt() {
     log "Analyzing current system optimizations..."
     
@@ -1290,6 +1320,7 @@ main() {
     echo ""
     
     check_root
+    check_proxmox
     
     # Setup directories
     mkdir -p "$(dirname "$LOG_FILE")" "$BACKUP_DIR"