Make auto cleanup fast and clean

Changes:
- Suppress trace eraser output in auto mode (only show ✓)
- Clear screen after cleanup
- Leave user in /root directory
- Single success message

Result:
- Question -> yes -> quick cleanup -> ✓ All traces removed -> /root
- Fast, minimal output, clean exit

tools/erase-toolkit-traces.sh

@@ -31,9 +31,12 @@ if [ "$TRACE_ERASER_AUTO" != "yes" ]; then
     fi
 fi
 
-echo ""
-echo "Removing traces..."
-echo ""
+# Only show progress if not in auto mode
+if [ "$TRACE_ERASER_AUTO" != "yes" ]; then
+    echo ""
+    echo "Removing traces..."
+    echo ""
+fi
 
 # Patterns to remove from history
 PATTERNS=(
@@ -159,13 +162,11 @@ fi
 
 # Offer to remove the entire toolkit (AFTER history cleaning)
 if [ "$TRACE_ERASER_AUTO" = "yes" ]; then
-    # Auto mode: always remove directory and skip prompt
-    echo ""
-    echo "Removing toolkit directory..."
-    cd /root
-    rm -rf "$SCRIPT_DIR"
-    echo ""
-    echo -e "${GREEN}✓ Toolkit completely removed${NC}"
+    # Auto mode: quick cleanup, minimal output
+    cd /root 2>/dev/null
+    rm -rf "$SCRIPT_DIR" 2>/dev/null
+    clear
+    echo -e "${GREEN}✓ All traces removed${NC}"
 else
     # Manual mode: ask user
     echo ""
@@ -190,9 +191,9 @@ else
         echo "Toolkit directory remains at: $SCRIPT_DIR"
         echo "You can manually remove it later with: rm -rf $SCRIPT_DIR"
     fi
-fi
 
-echo ""
-echo "All traces removed. The trace eraser commands will also be"
-echo "removed when you log out or start a new shell session."
-echo ""
+    echo ""
+    echo "All traces removed. The trace eraser commands will also be"
+    echo "removed when you log out or start a new shell session."
+    echo ""
+fi