feat(auth): integrate PostHog for user identification and tracking

components/auth-dialog-wrapper.tsx

@@ -5,6 +5,7 @@ import { useAuthStore } from "@/store/auth-store";
 import { useEffect } from "react";
 import { authClient } from "@/lib/auth-client";
 import { executePostLoginAction } from "@/hooks/use-post-login-action";
+import { usePostHog } from "posthog-js/react";
 
 export function AuthDialogWrapper() {
   const {
@@ -15,17 +16,33 @@ export function AuthDialogWrapper() {
     clearPostLoginAction,
   } = useAuthStore();
   const { data: session } = authClient.useSession();
+  const posthog = usePostHog();
 
   useEffect(() => {
     if (isOpen && session) {
       closeAuthDialog();
     }
 
+    if (session && session.user && session.user.email) {
+      // Identify user with PostHog
+      posthog.identify(session.user.email, {
+        name: session.user.name,
+        email: session.user.email,
+      });
+    }
+
     if (session && postLoginAction) {
       executePostLoginAction(postLoginAction);
       clearPostLoginAction();
     }
-  }, [session, isOpen, closeAuthDialog, postLoginAction, clearPostLoginAction]);
+  }, [
+    session,
+    isOpen,
+    closeAuthDialog,
+    postLoginAction,
+    clearPostLoginAction,
+    posthog,
+  ]);
 
   return (
     <AuthDialog

components/user-profile-dropdown.tsx

@@ -15,10 +15,12 @@ import { AnimatePresence, motion } from "motion/react";
 import { Loader2 } from "lucide-react";
 import Link from "next/link";
 import { useAuthStore } from "@/store/auth-store";
+import { usePostHog } from "posthog-js/react";
 
 export function UserProfileDropdown() {
   const { data: session, isPending } = authClient.useSession();
   const { openAuthDialog } = useAuthStore();
+  const posthog = usePostHog();
 
   return (
     <AnimatePresence mode="wait">
@@ -91,6 +93,7 @@ export function UserProfileDropdown() {
               </DropdownMenuItem>
               <DropdownMenuItem
                 onClick={async () => {
+                  posthog.reset();
                   await authClient.signOut();
                 }}
               >