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/src/state.rs

@@ -10,6 +10,4 @@ pub struct AppState {
     pub rss_renderer: Arc<dyn RssFeedRenderer>,
     #[cfg(feature = "federation")]
     pub ap_service: Arc<dyn activitypub::ActivityPubPort>,
-    #[cfg(feature = "federation")]
-    pub social_query: Arc<dyn domain::ports::SocialQueryPort>,
 }