fix: explicit TS types for Supabase session to fix Vercel build

web/src/App.tsx

@@ -1,5 +1,5 @@
 import { useEffect, useMemo, useState } from 'react';
-import type { Session } from '@supabase/supabase-js';
+import type { Session, AuthChangeEvent } from '@supabase/supabase-js';
 import { supabase } from './supabaseClient';
 import { AuthPage } from './components/AuthPage';
 import { Dashboard } from './pages/Dashboard';
@@ -30,11 +30,11 @@ const App = () => {
       setAuthLoading(false);
       return;
     }
-    supabase.auth.getSession().then(({ data: { session: s } }) => {
+    supabase.auth.getSession().then(({ data: { session: s } }: { data: { session: Session | null } }) => {
       setSession(s);
       setAuthLoading(false);
     }).catch(() => setAuthLoading(false));
-    const { data: { subscription } } = supabase.auth.onAuthStateChange((_event, s) => {
+    const { data: { subscription } } = supabase.auth.onAuthStateChange((_event: AuthChangeEvent, s: Session | null) => {
       setSession(s);
     });
     return () => subscription.unsubscribe();
@@ -89,9 +89,8 @@ const App = () => {
     );
   }
 
-  // ── Auth gate (skip in local dev when Supabase not configured) ──
   if (AUTH_ENABLED && !session) {
-    return <AuthPage onAuth={() => supabase.auth.getSession().then(({ data: { session: s } }) => setSession(s))} />;
+    return <AuthPage onAuth={() => supabase.auth.getSession().then(({ data: { session: s } }: { data: { session: Session | null } }) => setSession(s))} />;
   }
 
   return (

web/src/components/AuthPage.tsx

@@ -23,7 +23,13 @@ export const AuthPage = ({ onAuth }: { onAuth: () => void }) => {
         if (err) throw err;
         onAuth();
       } else {
-        const { error: err } = await supabase.auth.signUp({ email, password });
+        const { error: err } = await supabase.auth.signUp({ 
+          email, 
+          password,
+          options: {
+            emailRedirectTo: window.location.origin
+          }
+        });
         if (err) throw err;
         setSuccessMsg('We sent you a confirmation link. Check your email to continue.');
       }