Refactor auth event handling with improved typing and callbacks (#254)

Simplify and enhance the `onEvent` logic by using `useCallback` for better performance and typing with `AuthChangeEvent` and `Session`. Add handling for the `INITIAL_SESSION` event, ensuring proper user identification and monitoring initialization.

apps/web/components/auth-provider.tsx

@@ -2,6 +2,8 @@
 
 import { useCallback } from 'react';
 
+import type { AuthChangeEvent, Session } from '@supabase/supabase-js';
+
 import { useMonitoring } from '@kit/monitoring/hooks';
 import { useAppEvents } from '@kit/shared/events';
 import { useAuthChangeListener } from '@kit/supabase/hooks/use-auth-change-listener';
@@ -11,13 +13,18 @@ import pathsConfig from '~/config/paths.config';
 export function AuthProvider(props: React.PropsWithChildren) {
   const dispatchEvent = useDispatchAppEventFromAuthEvent();
 
-  useAuthChangeListener({
-    appHomePath: pathsConfig.app.home,
-    onEvent: (event, session) => {
+  const onEvent = useCallback(
+    (event: AuthChangeEvent, session: Session | null) => {
       dispatchEvent(event, session?.user.id, {
         email: session?.user.email ?? '',
       });
     },
+    [dispatchEvent],
+  );
+
+  useAuthChangeListener({
+    appHomePath: pathsConfig.app.home,
+    onEvent,
   });
 
   return props.children;
@@ -29,11 +36,23 @@ function useDispatchAppEventFromAuthEvent() {
 
   return useCallback(
     (
-      type: string,
+      type: AuthChangeEvent,
       userId: string | undefined,
       traits: Record<string, string> = {},
     ) => {
       switch (type) {
+        case 'INITIAL_SESSION':
+          if (userId) {
+            emit({
+              type: 'user.signedIn',
+              payload: { userId, ...traits },
+            });
+
+            monitoring.identifyUser({ id: userId, ...traits });
+          }
+
+          break;
+
         case 'SIGNED_IN':
           if (userId) {
             emit({