Make user history cleaning optional in trace eraser

User bash history cleaning is now optional with a prompt, since most users only work as root.

Changes:
• Added user count detection
• Prompts: "Clean user bash histories too? (y/n) [n]"
• Default is "no" (skip user histories)
• If no users exist, automatically skips
• Only cleans root history by default (faster, covers 99% of use cases)

This makes the script faster and more sensible for typical usage where only root is used to run the toolkit.

tools/erase-toolkit-traces.sh

@@ -73,29 +73,47 @@ if [ -f ~/.bash_history ]; then
     history -w
 fi
 
-# Clean bash history for all users
+# Clean bash history for all users (optional - skip if only root is used)
 echo "→ Checking user histories..."
+user_count=0
 for user_home in /home/*; do
-    if [ -f "$user_home/.bash_history" ]; then
-        username=$(basename "$user_home")
-        echo "  → Cleaning history for $username..."
-
-        # Remove last 50 lines from user history
-        total_lines=$(wc -l < "$user_home/.bash_history")
-        if [ "$total_lines" -gt 50 ]; then
-            lines_to_keep=$((total_lines - 50))
-            head -n "$lines_to_keep" "$user_home/.bash_history" > "$user_home/.bash_history.tmp"
-            mv "$user_home/.bash_history.tmp" "$user_home/.bash_history"
-            chown "$username:$username" "$user_home/.bash_history" 2>/dev/null
-            echo "    ✓ Cleaned (removed last 50 entries)"
-        else
-            > "$user_home/.bash_history"
-            chown "$username:$username" "$user_home/.bash_history" 2>/dev/null
-            echo "    ✓ Cleared (file had < 50 entries)"
-        fi
-    fi
+    [ -d "$user_home" ] && user_count=$((user_count + 1))
 done
 
+if [ "$user_count" -eq 0 ]; then
+    echo "  ✓ No user accounts found (skipped)"
+else
+    echo "  Found $user_count user account(s)"
+    echo ""
+    read -p "  Clean user bash histories too? (y/n) [n]: " clean_users
+
+    if [ "$clean_users" = "y" ] || [ "$clean_users" = "Y" ]; then
+        for user_home in /home/*; do
+            if [ -f "$user_home/.bash_history" ]; then
+                username=$(basename "$user_home")
+                echo "  → Cleaning history for $username..."
+
+                # Remove last 50 lines from user history
+                total_lines=$(wc -l < "$user_home/.bash_history")
+                if [ "$total_lines" -gt 50 ]; then
+                    lines_to_keep=$((total_lines - 50))
+                    head -n "$lines_to_keep" "$user_home/.bash_history" > "$user_home/.bash_history.tmp"
+                    mv "$user_home/.bash_history.tmp" "$user_home/.bash_history"
+                    chown "$username:$username" "$user_home/.bash_history" 2>/dev/null
+                    echo "    ✓ Cleaned (removed last 50 entries)"
+                else
+                    > "$user_home/.bash_history"
+                    chown "$username:$username" "$user_home/.bash_history" 2>/dev/null
+                    echo "    ✓ Cleared (file had < 50 entries)"
+                fi
+            fi
+        done
+    else
+        echo "  ✓ Skipped user histories (only root cleaned)"
+    fi
+fi
+echo ""
+
 # Clean system logs (pattern-based for logs, not history)
 echo "→ Cleaning system logs..."
 if [ -f /var/log/messages ]; then