Fix HIGH priority issues: paths, globs, deps, wordsplit

- Fixed 3 unquoted path expansions in cleanup-toolkit-data.sh
  (lines 175, 192-193: quoted $pattern in ls/rm commands)

- Fixed 3 unquoted globs in erase/malware-scanner scripts
  (erase-toolkit-traces.sh lines 103-104, malware-scanner.sh line 229)

- Added system-detect.sh sourcing to email-functions.sh
  (fixes 5 HIGH priority DEP warnings for detect_control_panel)

- Fixed 2 WORDSPLIT issues in mysql-analyzer.sh
  (lines 137, 362: changed from for loops to while read loops
   to safely handle database/table names with spaces)

lib/email-functions.sh

@@ -6,6 +6,12 @@
 # Shared functions for email troubleshooting modules
 ################################################################################
 
+# Source system detection (for detect_control_panel function)
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+if [ -f "$SCRIPT_DIR/system-detect.sh" ]; then
+    source "$SCRIPT_DIR/system-detect.sh"
+fi
+
 # Detect MTA (Mail Transfer Agent)
 detect_mta() {
     if command -v exim &>/dev/null; then