refactor login flow and hooks, address autologin issues

webclient/integration/src/services/dexie/resetDexie.ts

@@ -0,0 +1,12 @@
+// Clears every table the services suite touches so each test starts from
+// empty storage. Dexie is a real singleton, the database a real (fake-
+// indexeddb) instance, so state leaks between tests otherwise.
+
+import { dexieService } from '@app/services';
+
+export async function resetDexie(): Promise<void> {
+  await Promise.all([
+    dexieService.settings.clear(),
+    dexieService.hosts.clear(),
+  ]);
+}