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/auth/callback/page.tsx

@@ -18,7 +18,6 @@ const CallbackPage: FC = (): ReactElement => {
       hasRunRef.current = true;
 
       try {
-        // Check URL hash for Supabase email confirmation callback
         const hashParams = new URLSearchParams(
           globalThis.location.hash.substring(1)
         );
@@ -28,7 +27,6 @@ const CallbackPage: FC = (): ReactElement => {
         const accessToken =
           hashParams.get('access_token') || urlParams.get('access_token');
 
-        // Debug: log what we received
         console.log('[Callback] Params:', {
           type,
           accessToken: !!accessToken,
@@ -36,19 +34,15 @@ const CallbackPage: FC = (): ReactElement => {
           search: globalThis.location.search,
         });
 
-        // Handle Supabase email callbacks (has access_token in hash or query)
-        // This includes: signup confirmation, email confirmation, password recovery
         if (accessToken) {
           setIsProcessing(false);
 
-          // Password recovery - type is 'recovery' or we have access_token from reset email
           if (type === 'recovery' || type === 'magiclink') {
             toast.success('Email verified! Please set your new password.');
             navigate('/auth/reset-password?access_token=' + accessToken);
             return;
           }
 
-          // Signup/Email confirmation
           if (type === 'signup' || type === 'email_confirmation') {
             toast.success(
               'Email verified successfully! Please log in to continue.'
@@ -57,27 +51,22 @@ const CallbackPage: FC = (): ReactElement => {
             return;
           }
 
-          // If we have access_token but unknown type, assume it's password recovery
-          // (Supabase sometimes sends without explicit type)
           toast.success('Email verified! Please set your new password.');
           navigate('/auth/reset-password?access_token=' + accessToken);
           return;
         }
 
-        // Get the code from URL query params (GitHub OAuth)
         const code = urlParams.get('code');
 
         if (!code) {
           throw new Error('No authorization code received');
         }
 
-        // Exchange the code for tokens using backend API (GitHub OAuth)
         const result = await exchangeGitHubCode({ code });
 
         toast.success('Login successful!');
         setIsProcessing(false);
 
-        // Check if user has completed onboarding (has location)
         if (result.user.location) {
           globalThis.location.replace('/dashboard');
         } else {
@@ -100,7 +89,6 @@ const CallbackPage: FC = (): ReactElement => {
   }, []);
 
   if (error) {
-    // Check if error is related to private email
     const isPrivateEmailError =
       error.toLowerCase().includes('failed to create user') ||
       error.toLowerCase().includes('email') ||

apps/qrcampaign/src/app/auth/login/page.tsx

@@ -23,7 +23,6 @@ export default function LoginPage() {
     }
   }, [isAuthenticated, navigate]);
 
-  // Check for password reset tokens in URL and redirect to reset-password page
   useEffect(() => {
     const hashParams = new URLSearchParams(
       globalThis.location.hash.substring(1)
@@ -34,13 +33,11 @@ export default function LoginPage() {
       hashParams.get('access_token') || urlParams.get('access_token');
     const type = hashParams.get('type') || urlParams.get('type');
 
-    // If we have an access_token, this is likely a password reset redirect that landed on the wrong page
     if (accessToken) {
       console.log(
         '[Login] Detected access_token, redirecting to reset-password page'
       );
 
-      // Check if it's a password recovery
       if (type === 'recovery' || type === 'magiclink' || !type) {
         toast.info('Redirecting to password reset...');
         navigate('/auth/reset-password?access_token=' + accessToken);
@@ -76,22 +73,14 @@ export default function LoginPage() {
   };
 
   const handleGithubLogin = async () => {
-    // TODO: Implement GitHub login with new auth service if needed
     toast.info('GitHub login coming soon');
   };
 
   return (
     <div className="flex justify-center items-center min-h-screen bg-gray-50 p-4">
       <div className="bg-white w-full max-w-md p-8 rounded-2xl shadow-lg border border-gray-200">
-        {/* <div className="flex items-center justify-between mb-6">
-          <button
-            onClick={() => navigate('/')}
-            className="cursor-pointer text-primary-500 hover:text-primary-600 text-base font-sans flex items-center"
-          >
-            <Icon icon="ic:baseline-chevron-left" width="24" height="24" />
-            Back to Homepage
-          </button>
-        </div> */}
+        {
+}
 
         <div className="text-center mb-8">
           <h2 className="text-3xl font-bold text-gray-900 mb-2">
@@ -106,7 +95,6 @@ export default function LoginPage() {
           </div>
         )}
 
-        {/* Traditional Login Form */}
         <form onSubmit={handleEmailLogin} className="space-y-4 mb-6">
           <div>
             <label

apps/qrcampaign/src/app/auth/reset-password/page.tsx

@@ -18,8 +18,6 @@ export default function ResetPasswordPage() {
   const [showConfirmPassword, setShowConfirmPassword] = useState(false);
 
   useEffect(() => {
-    // Get the access_token from URL hash (Supabase sends it as hash fragment)
-    // or from query params (when redirected from callback page)
     const hashParams = new URLSearchParams(
       globalThis.location.hash.substring(1)
     );
@@ -61,7 +59,6 @@ export default function ResetPasswordPage() {
 
       toast.success('Password updated successfully!');
 
-      // Clear session and redirect to login
       clearSession();
       navigate('/auth/login');
     } catch (err) {

apps/qrcampaign/src/app/auth/signup/page.tsx

@@ -62,7 +62,6 @@ export default function SignupPage() {
       navigate('/');
     } catch (err: any) {
       console.error('[Signup] Email signup failed:', err);
-      // Construct a user-friendly error message
       const errorMessage =
         err.response?.data?.message || err.message || 'Signup failed';
       setError(errorMessage);