refactor: LOW cleanups — dedup secure_flag, remove vestigial social_query,

drop PersistedImportSession, rename LoginQuery→LoginCommand, own
DeleteAccountDeps, PersonId via uuid_id! macro, rename SortDirection→
ReviewSortBy, TUI fs::read→Command, generic PaginatedResponse<T>

crates/presentation/tests/api_test.rs

@@ -500,8 +500,6 @@ async fn test_app() -> Router {
         rss_renderer: Arc::new(RssAdapter::new("http://localhost:3000".into())),
         #[cfg(feature = "federation")]
         ap_service: Arc::new(activitypub::NoopActivityPubService),
-        #[cfg(feature = "federation")]
-        social_query: Arc::new(PanicSocialQuery),
     };
 
     routes::build_router(state, axum::Router::new())