redesigned payment page + a lot of fixes

frontend/pweb/lib/providers/account.dart

@@ -1,12 +1,28 @@
 import 'dart:async';
 
 import 'package:pshared/models/account/account.dart';
+import 'package:pshared/models/auth/login_outcome.dart';
 import 'package:pshared/provider/account.dart';
 
 import 'package:pweb/services/posthog.dart';
 
 
 class PwebAccountProvider extends AccountProvider {
+  @override
+  Future<LoginOutcome> login({
+    required String email,
+    required String password,
+    required String locale,
+  }) async {
+    final outcome = await super.login(
+      email: email,
+      password: password,
+      locale: locale,
+    );
+    unawaited(PosthogService.login(pending: outcome.isPending));
+    return outcome;
+  }
+
   @override
   Future<void> onAccountChanged(Account? previous, Account? current) {
     if (current != null) {