Standardize 500-error-tracker.sh menu formatting and add input validation

IMPROVEMENTS:
- Added input validation for time range choice (0-3) with retry loop
- Added color codes to menu options (${CYAN}1)${NC} format)
- Removed wildcard case fallback that silently accepted invalid input
- Added explicit break statements for valid selections

VALIDATION DETAILS:
- Time range: Only accepts 0-3, rejects invalid input with clear error
- Option 0: Cancel and exit (no silent fallback)
- Options 1-3: Valid time ranges for scanning

MENU STANDARDS COMPLIANCE:
✓ Input validation (CRITICAL)
✓ Default values (already had)
✓ Color codes (CRITICAL)
✓ Error messages on invalid input (IMPORTANT)
✓ Retry logic for failed validation (IMPORTANT)

Lines modified: ~25 (input validation + color codes)

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

modules/website/500-error-tracker.sh

@@ -25,14 +25,22 @@ echo ""
 
 # Ask for time range
 echo -e "${CYAN}How far back to scan?${NC}"
-echo "  1) Last 24 hours (default)"
+echo -e "  ${CYAN}1)${NC} Last 24 hours (default)"
-echo "  2) Last 7 days"
+echo -e "  ${CYAN}2)${NC} Last 7 days"
-echo "  3) Last 30 days"
+echo -e "  ${CYAN}3)${NC} Last 30 days"
-echo "  0) Cancel and return to menu"
+echo -e "  ${CYAN}0)${NC} Cancel and return to menu"
 echo ""
+
+# Validate time_choice input
+while true; do
     read -p "Select option [1]: " time_choice
     time_choice=${time_choice:-1}
 
+    if ! [[ "$time_choice" =~ ^[0-3]$ ]]; then
+        print_error "Invalid choice. Please enter 0, 1, 2, or 3"
+        continue
+    fi
+
     case $time_choice in
         0)
             echo ""
@@ -40,11 +48,11 @@ case $time_choice in
             echo ""
             exit 0
             ;;
-    1) HOURS_TO_SCAN=24 ;;
+        1) HOURS_TO_SCAN=24; break ;;
-    2) HOURS_TO_SCAN=168 ;;
+        2) HOURS_TO_SCAN=168; break ;;
-    3) HOURS_TO_SCAN=720 ;;
+        3) HOURS_TO_SCAN=720; break ;;
-    *) HOURS_TO_SCAN=24 ;;
     esac
+done
 
 echo ""
 echo "→ Scanning last $HOURS_TO_SCAN hours of access logs..."