Iced GUI framework Elm architecture patterns for Rust. Feature-based code organization, message flow, Task::done dispatch, core/UI separation, snapshots, deferred side effects, subscriptions, component independence. Persistence and app state: database initialization only in main.rs; transient store (no singleton, no factory); Directory generic over store; store only in constructor; call store.get_last_session from workspace; on folder load failure keep previous state. Solved patterns: keyboard→app→workspace→feature message chain, selectable rows with one parent background (hover/delete without breaking layout), consolidated styles in theme.rs, delete+hover list UX, selection styling (widget outline + row background, same accent family, vertical centering in cells). Use when building iced UI features, adding messages, creating views, wiring components, organizing iced code, implementing persistence/session, row layout, or selection styling.