Fix: Maldet menu now runs ONLY Maldet, not all scanners

Issue: Selecting scan from Maldet menu ran all available scanners (ImunifyAV, Maldet, RKHunter) instead of just Maldet

Root cause: Variable case mismatch - code checked AVAILABLE_SCANNERS (uppercase) but actual array was available_scanners (lowercase). So MALDET_ONLY filter never worked.

Solution:
- Fixed variable names to lowercase throughout
- MALDET_ONLY flag now properly filters to Maldet-only
- Changed exit to return (for sourced function)

Now Maldet menu only uses Maldet, multi-scanner mode is separate.

modules/security/malware-scanner.sh

@@ -1480,16 +1480,17 @@ fi
 # Filter scanners if MALDET_ONLY is set (for Maldet-specific menu)
 if [ "${MALDET_ONLY:-0}" = "1" ]; then
     log_message "Maldet-only mode enabled"
-    echo "🔍 Running Maldet-only scan (fastest, Linux-focused)"
+    echo "Running Maldet-only scan (fastest, Linux-focused)"
     echo ""
     # Check if Maldet is available
-    if [[ " ${AVAILABLE_SCANNERS[@]} " =~ " maldet " ]]; then
-        AVAILABLE_SCANNERS=("maldet")
+    if [[ " ${available_scanners[@]} " =~ " maldet " ]]; then
+        available_scanners=("maldet")
         log_message "Filtered to Maldet only"
     else
         log_message "ERROR: Maldet not installed but MALDET_ONLY was set"
         echo -e "${RED}ERROR: Maldet is not installed${NC}"
-        exit 1
+        read -p "Press Enter to continue..." < /dev/tty 2>/dev/null || true
+        return 1
     fi
 fi