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/domain/src/models/import_session.rs

@@ -15,16 +15,6 @@ pub struct ImportSession {
     pub expires_at: NaiveDateTime,
 }
 
-pub struct PersistedImportSession {
-    pub id: ImportSessionId,
-    pub user_id: UserId,
-    pub parsed_file: Option<ParsedFile>,
-    pub field_mappings: Option<Vec<FieldMapping>>,
-    pub row_results: Option<Vec<AnnotatedRow>>,
-    pub created_at: NaiveDateTime,
-    pub expires_at: NaiveDateTime,
-}
-
 impl ImportSession {
     pub fn new(user_id: UserId) -> Self {
         let created_at = chrono::Utc::now().naive_utc();
@@ -39,16 +29,4 @@ impl ImportSession {
             expires_at,
         }
     }
-
-    pub fn from_persistence(p: PersistedImportSession) -> Self {
-        Self {
-            id: p.id,
-            user_id: p.user_id,
-            parsed_file: p.parsed_file,
-            field_mappings: p.field_mappings,
-            row_results: p.row_results,
-            created_at: p.created_at,
-            expires_at: p.expires_at,
-        }
-    }
 }