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/qrcampaign/src/app/page.tsx

@@ -11,7 +11,7 @@ export default function HomePage() {
 
   const handleImageDropped = (file: File) => {
     setImageFile(file);
-    setGeneratedImage(null); // Reset previous result
+    setGeneratedImage(null);
     toast.success('Image selected ready for generation!');
   };