Add change tracking and history display to Option 5

- Initialize change tracking before applying optimizations
- Log each change made during optimization process
- Track before/after values for all modifications
- Display detailed change log after optimization completes
- Show recent change history from change tracker
- Provides auditability and visibility into what changed

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

modules/performance/php-optimizer.sh

@@ -1035,6 +1035,9 @@ optimize_all_domains() {
     cecho "${CYAN}Selected: ${#domains_to_apply[@]} domain(s)/user(s)${NC}"
     echo ""
 
+    # Initialize change tracking
+    init_change_tracking 2>/dev/null || true
+
     # Get all users
     local users
     users=$(list_all_users)
@@ -1050,6 +1053,7 @@ optimize_all_domains() {
     local optimized_count=0
     local skipped_count=0
     declare -A optimization_summary
+    declare -a changes_made_list
 
     # Process each user
     while IFS= read -r username; do
@@ -1150,6 +1154,10 @@ optimize_all_domains() {
             if [ "$changes_made" -gt 0 ]; then
                 cecho "    ${GREEN}✓${NC} Optimized ($changes_made changes): $changes_list"
                 optimized_count=$((optimized_count + 1))
+
+                # Log the change
+                log_change "$domain|$username" "pm.max_children" "$current_max_children" "$recommended_max_children" "Server-wide optimization" 2>/dev/null || true
+                changes_made_list+=("$domain: $current_max_children → $recommended_max_children (freed ~$((( current_max_children - recommended_max_children ) * 20))MB)")
             else
                 if [ -n "$changes_list" ]; then
                     cecho "    ${YELLOW}⊙${NC} Detected: $changes_list (manual intervention needed)"
@@ -1199,7 +1207,35 @@ optimize_all_domains() {
     fi
 
     echo ""
-    cecho "${CYAN}═══════════════════════════════════════════════════════════════════${NC}"
+
+    # Display change history
+    if [ "${#changes_made_list[@]}" -gt 0 ]; then
+        cecho "${CYAN}─────────────────────────────────────────────────────────────────────${NC}"
+        cecho "${WHITE}${BOLD}DETAILED CHANGES${NC}"
+        cecho "${CYAN}─────────────────────────────────────────────────────────────────────${NC}"
+        echo ""
+
+        for change in "${changes_made_list[@]}"; do
+            cecho "  ${GREEN}✓${NC} $change"
+        done
+
+        echo ""
+
+        # Get recent change history from tracker
+        local recent_changes
+        recent_changes=$(get_change_history 2>/dev/null || echo "")
+
+        if [ -n "$recent_changes" ]; then
+            cecho "${CYAN}─────────────────────────────────────────────────────────────────────${NC}"
+            cecho "${WHITE}${BOLD}CHANGE HISTORY${NC}"
+            cecho "${CYAN}─────────────────────────────────────────────────────────────────────${NC}"
+            echo ""
+            cecho "$recent_changes" | head -20  # Show last 20 changes
+            echo ""
+        fi
+    fi
+
+    cecho "${CYAN}═════════════════════════════════════════════════════════════════════${NC}"
     echo ""
     read -p "Press Enter to continue..."
 }