Add advanced domain filtering to domain selection

- Add filter menu: by name, by traffic, by optimization status
- Search domains by regex pattern
- Show only high-traffic domains (peak >= 10 concurrent requests)
- Show only domains needing optimization (CRITICAL/HIGH issues)
- Display peak concurrent requests alongside domain info
- Makes it easier to find and target specific domains for optimization
- Works in conjunction with single/batch optimization

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

modules/performance/php-optimizer.sh

@@ -79,6 +79,25 @@ select_domain() {
     cecho "${WHITE}${BOLD}SELECT DOMAIN${NC}"
     echo ""
 
+    # Ask about filtering
+    cecho "${CYAN}Filter options:${NC}"
+    cecho "  ${GREEN}n${NC}) No filter (show all)"
+    cecho "  ${GREEN}s${NC}) Search by name"
+    cecho "  ${GREEN}t${NC}) Show high-traffic domains"
+    cecho "  ${GREEN}o${NC}) Show domains needing optimization"
+    cecho "  ${RED}q${NC}) Cancel"
+    echo ""
+    cecho "${CYAN}─────────────────────────────────────────────────────────────────────${NC}"
+
+    read -p "Select filter: " filter_choice
+    filter_choice=$(echo "${filter_choice,,}")
+
+    case "$filter_choice" in
+        q)
+            return 1
+            ;;
+    esac
+
     # Get all users with domains
     local users
     users=$(list_all_users)
@@ -110,12 +129,59 @@ select_domain() {
         return 1
     fi
 
+    # Apply filters
+    declare -a filtered_domains
+
+    case "$filter_choice" in
+        s)
+            # Search by name
+            echo ""
+            read -p "Search pattern: " search_pattern
+            for domain in "${domains[@]}"; do
+                if [[ "$domain" =~ $search_pattern ]]; then
+                    filtered_domains+=("$domain")
+                fi
+            done
+            ;;
+        t)
+            # High-traffic domains
+            for domain in "${domains[@]}"; do
+                local peak=$(get_domain_peak_concurrent "$domain" 2>/dev/null || echo "0")
+                if [[ "$peak" =~ ^[0-9]+$ ]] && [ "$peak" -ge 10 ]; then
+                    filtered_domains+=("$domain")
+                fi
+            done
+            # Sort by peak traffic (highest first)
+            ;;
+        o)
+            # Domains needing optimization
+            for domain in "${domains[@]}"; do
+                local username="${domain_to_user[$domain]}"
+                local issues=$(detect_php_config_issues "$username" "$domain" 2>/dev/null || echo "NONE|NONE|None")
+                local has_high_issues=$(echo "$issues" | grep -cE "^[^|]*\|(CRITICAL|HIGH)\|" 2>/dev/null || echo "0")
+                if [ "$has_high_issues" -gt 0 ]; then
+                    filtered_domains+=("$domain")
+                fi
+            done
+            ;;
+        *)
+            # No filter
+            filtered_domains=("${domains[@]}")
+            ;;
+    esac
+
+    if [ ${#filtered_domains[@]} -eq 0 ]; then
+        cecho "${YELLOW}No domains match filter criteria${NC}"
+        read -p "Press Enter to continue..."
+        return 1
+    fi
+
     # Display numbered list with optimization status
     cecho "${CYAN}Available domains:${NC}"
     echo ""
 
     local index=1
-    for domain in "${domains[@]}"; do
+    for domain in "${filtered_domains[@]}"; do
         local username="${domain_to_user[$domain]}"
         local php_version
         php_version=$(detect_php_version_for_domain "$username" "$domain" 2>/dev/null || echo "unknown")
@@ -135,7 +201,14 @@ select_domain() {
             fi
         fi
 
-        printf "  ${GREEN}%-3d${NC}) %-40s ${CYAN}[${username}]${NC} ${YELLOW}(${php_version})${NC} %s\n" "$index" "$domain" "$(echo -e "$status_indicator")"
+        # Show peak traffic if available
+        local traffic_info=""
+        local peak=$(get_domain_peak_concurrent "$domain" 2>/dev/null || echo "")
+        if [ -n "$peak" ] && [ "$peak" != "?" ]; then
+            traffic_info="${CYAN}(peak: ${peak})${NC} "
+        fi
+
+        printf "  ${GREEN}%-3d${NC}) %-40s ${CYAN}[${username}]${NC} ${YELLOW}(${php_version})${NC} %s%s\n" "$index" "$domain" "$(echo -e "$traffic_info")" "$(echo -e "$status_indicator")"
         index=$((index + 1))
     done
 
@@ -150,9 +223,9 @@ select_domain() {
             return 1
         fi
 
-        if ! [[ "$selection" =~ ^[0-9]+$ ]] || [ "$selection" -lt 1 ] || [ "$selection" -gt ${#domains[@]} ]; then
+        if ! [[ "$selection" =~ ^[0-9]+$ ]] || [ "$selection" -lt 1 ] || [ "$selection" -gt ${#filtered_domains[@]} ]; then
             echo ""
-            cecho "${RED}Invalid selection. Please enter a number 1-${#domains[@]}${NC}"
+            cecho "${RED}Invalid selection. Please enter a number 1-${#filtered_domains[@]}${NC}"
             echo ""
             continue
         fi
@@ -161,7 +234,7 @@ select_domain() {
     done
 
     # Return selected domain and username
-    local selected_domain="${domains[$((selection - 1))]}"
+    local selected_domain="${filtered_domains[$((selection - 1))]}"
     local selected_user="${domain_to_user[$selected_domain]}"
 
     echo "$selected_domain|$selected_user"