chore: upgrade dependencies, restructure shared libs, and fix UI

- Upgrade Nx 22.1.1 → 22.6.3 and all patch/minor dependencies
- Restructure shared libs: move business logic from utils to service
- Consolidate shadcn-ui into ui lib with atomic design pattern
- Fix container centering for landing app (Tailwind v4 compatibility)
- Fix button styling by updating @source directive in globals.css
- Fix SiCss3 → SiCss rename in react-icons 5.6
- Fix duplicate useSession export conflict
- Remove dead code, comments, and unused files

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/landing/src/app/(public)/roadmap/_components/projects-vote.tsx

@@ -79,7 +79,7 @@ export default function ProjectsVote() {
 
   return (
     <div className="grid grid-cols-1 lg:grid-cols-3 gap-6 max-w-7xl mx-auto">
-      {/* Vote Now Column */}
+
       <div className="space-y-6">
         <div className="flex items-center gap-3 px-2">
           <div className="flex items-center justify-center w-10 h-10 bg-amber-100 text-amber-600 rounded-lg">
@@ -144,7 +144,6 @@ export default function ProjectsVote() {
         </AnimatePresence>
       </div>
 
-      {/* In Progress Column */}
       <div className="space-y-6">
         <div className="flex items-center gap-3 px-2">
           <div className="flex items-center justify-center w-10 h-10 bg-primary-100 text-primary-600 rounded-lg">
@@ -189,7 +188,6 @@ export default function ProjectsVote() {
         </AnimatePresence>
       </div>
 
-      {/* Completed Column */}
       <div className="space-y-6">
         <div className="flex items-center gap-3 px-2">
           <div className="flex items-center justify-center w-10 h-10 bg-green-100 text-green-600 rounded-lg">