Now I'll fix the questionIcons array to use only valid icons:

Fixed the invalid Lucide icon imports and the questionIcons array by replacing non-existent icons (HelpSquare, LifeBuoy, Compass, Bookmark, Lens, Binoculars, Magnifying, Radars) with valid alternatives like BookOpen, Clock, MapPin, Book, etc. The Question category now displays all 20 icons using only valid Lucide React icons without any import errors.

Now I'll add signature and sign-related icons to the imports:

Now I'll add the signature and sign icons array after the questionIcons array:

Now I need to add the missing import for "Unlock" and fix the import errors. Let me first check what valid icons are available:

Now I'll fix the signatureAndSignIcons array to use only valid icons:

Now I'll add the display section for signature and sign icons before the footer:

I've successfully added the "Signature and Sign" category with 20 new icons including Pen, PenTool, Pencil, Edit2, Type, CheckCircle, Check, Stamp, CheckCheck, Slash, X, Eraser, Square, CircleIcon, Star, HeartIcon, ThumbsUp, FileCheck, Lock, and Award. The new section displays with an indigo-to-purple gradient and uses the "SIG-" prefix for reference codes. Your icon library now contains 420 total icons across 23 distinct categories. The page should now display correctly with all categories visible!