store [nfc]: Use accountId directly rather than store.account.id

Author: gnprice

test/model/store_test.dart

@@ -215,7 +215,7 @@ void main() {
       await prepareStore();
       updateMachine.debugPauseLoop();
       updateMachine.poll();
-      check(globalStore.perAccountSync(store.account.id)).identicalTo(store);
+      check(globalStore.perAccountSync(store.accountId)).identicalTo(store);
 
       // Let the server expire the event queue.
       connection.prepare(httpStatus: 400, json: {
@@ -228,7 +228,7 @@ void main() {
       await Future.delayed(Duration.zero);
 
       // The global store has a new store.
-      check(globalStore.perAccountSync(store.account.id)).not((it) => it.identicalTo(store));
+      check(globalStore.perAccountSync(store.accountId)).not((it) => it.identicalTo(store));
       updateFromGlobalStore();
 
       // The new UpdateMachine updates the new store.

test/widgets/store_test.dart

@@ -35,7 +35,7 @@ class MyWidgetWithMixinState extends State<MyWidgetWithMixin> with PerAccountSto
   @override
   Widget build(BuildContext context) {
     final brightness = Theme.of(context).brightness;
-    final accountId = PerAccountStoreWidget.of(context).account.id;
+    final accountId = PerAccountStoreWidget.of(context).accountId;
     return Text('brightness: $brightness; accountId: $accountId');
   }
 }
@@ -87,7 +87,7 @@ void main() {
             child: Builder(
               builder: (context) {
                 final store = PerAccountStoreWidget.of(context);
-                return Text('found store, account: ${store.account.id}');
+                return Text('found store, account: ${store.accountId}');
               })))));
     await tester.pump();
     await tester.pump();
@@ -109,7 +109,7 @@ void main() {
             child: Builder(
               builder: (context) {
                 final store = PerAccountStoreWidget.of(context);
-                return Text('found store, account: ${store.account.id}');
+                return Text('found store, account: ${store.accountId}');
               })))));
 
     // First, the global store has to load.
@@ -137,7 +137,7 @@ void main() {
             child: Builder(
               builder: (context) {
                 final store = PerAccountStoreWidget.of(context);
-                return Text('found store, account: ${store.account.id}');
+                return Text('found store, account: ${store.accountId}');
               })))));
 
     // (... even one that really is separate, with its own fresh state node ...)