Fix TypeScript build errors

- Remove unused alpha import from InviteForm
- Remove unused inviterName variables from InvitationPage share functions
- Build now passes successfully for Cloudflare deployment

🤖 Generated with [Claude Code](https://claude.ai/code)

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

src/components/invite/InviteForm.tsx

@@ -9,7 +9,6 @@ import {
   Box,
   Typography,
   Avatar,
-  alpha,
   useTheme,
 } from '@mui/material';
 import {

src/pages/InvitationPage.tsx

@@ -123,7 +123,6 @@ const InvitationPage = () => {
   };
 
   const handleEmailShare = () => {
-    const inviterName = personalizedInvite.inviterName || 'Oli S-B';
     const inviteeName = personalizedInvite.inviteeName;
     
     const subject = isGroupInvite 
@@ -138,7 +137,6 @@ const InvitationPage = () => {
   };
 
   const handleWhatsAppShare = () => {
-    const inviterName = personalizedInvite.inviterName || 'Oli S-B';
     const inviteeName = personalizedInvite.inviteeName;
     
     const greeting = inviteeName ? `Hi ${inviteeName}! ` : 'Hi! ';
@@ -149,7 +147,6 @@ const InvitationPage = () => {
   };
 
   const handleSMSShare = () => {
-    const inviterName = personalizedInvite.inviterName || 'Oli S-B';
     const inviteeName = personalizedInvite.inviteeName;
     
     const greeting = inviteeName ? `Hi ${inviteeName}! ` : 'Hi! ';