editor ui

CLAUDE.md

@@ -27,8 +27,8 @@ When the user says **"finish the epic"**, do all of the following in order:
 ## Commands
 
 ```bash
-cargo build                                # compile the workspace (kiln-core + kiln-tui)
-cargo run -p kiln-tui -- maps/start.toml   # play a board in the terminal
+cargo build                                # compile the workspace (kiln-core + kiln-ui + kiln-tui)
+cargo run -p kiln-tui -- maps/start.toml   # play/edit a world in the terminal
 cargo test                                 # run all tests
 cargo test <name>                          # run a single test by name (substring match)
 cargo clippy                               # lint
@@ -40,9 +40,10 @@ cargo fmt                                  # format
 `kiln` is a Cargo **workspace** that separates the engine from its front-ends so the same game data can be driven by different UIs:
 
 - **`kiln-core`** — the engine: all core game types (`Board`, `Glyph`, `Archetype`, `GameState`, …) plus `.toml` map-file load/save. No rendering or UI; every front-end depends on it.
-- **`kiln-tui`** — a terminal **player** (no editor yet) built on **ratatui 0.30 / crossterm**. Takes a map-file path on the command line and lets you walk the player around the board with the arrow keys.
+- **`kiln-ui`** — reusable, **game-agnostic** terminal UI widgets on **ratatui** (no `kiln-core` dep). Each widget owns its presentation + input handling and is generic over a host context `Ctx` it mutates only through callbacks. Currently holds the dialog/text-field system (`dialog::Dialog<Ctx>`) and the shared `dim_area` overlay helper; future home of the script text-editor wrapper.
+- **`kiln-tui`** — a terminal **player + world editor** built on **ratatui 0.30 / crossterm**, depending on both `kiln-core` and `kiln-ui`. Takes a world-file path on the command line; plays a board (arrow keys) and edits it (`Esc` → menu → `e`).
 
-Root `Cargo.toml`: `members = ["kiln-core", "kiln-tui"]`.
+Root `Cargo.toml`: `members = ["kiln-core", "kiln-tui", "kiln-ui"]`, with `ratatui`/`tui-input` pinned in `[workspace.dependencies]` so kiln-ui and kiln-tui share one version (their public APIs exchange ratatui types).
 
 ### kiln-core modules
 
@@ -128,18 +129,64 @@ The core types that were formerly monolithic in `game.rs` are now split into foc
 - `World` — the runtime representation of a `.toml` world file: `name: String`, `start: String` (key of the starting board), `scripts: HashMap<String, String>` (named Rhai source, shared across all boards), `boards: HashMap<String, Rc<RefCell<Board>>>` (all boards, always present). Every board is wrapped in `Rc<RefCell<Board>>` so multiple shared refs can coexist — `GameState` clones the active board's `Rc` for its `ScriptHost`, and all boards remain in `world.boards` at all times (no board is ever "removed" when active).
 - `pub fn load(path: &str) -> Result<World, Box<dyn std::error::Error>>` — reads a world `.toml` file, converts each `[boards.NAME.*]` subtable via `TryFrom<MapFile> for Board`, wraps each in `Rc::new(RefCell::new(...))`, and validates that `world.start` matches a board key.
 
+### kiln-ui modules
+
+Reusable, **game-agnostic** terminal UI widgets on **ratatui** — no `kiln-core` dependency. A widget owns its presentation + input handling and is generic over a host context `Ctx` it mutates *only through callbacks*, so a front-end decides what a choice does without the widget knowing about game/world types. The front-end owns the event loop and routes input to the widget while it is focused.
+
+**`kiln-ui/src/lib.rs`** — crate root:
+- `dim_area(area, buf)` (`pub`) — dims every cell in `area` (background tint for a modal overlay). Shared scaffolding: used by [`dialog`] here and re-borrowed by kiln-tui's `overlay::render_overlay_frame` so both modal styles dim identically.
+- `pub mod dialog;` — see below. (Future home of a full-screen script text-editor wrapper.)
+
+**`kiln-ui/src/dialog.rs`** — modal dialog widgets, backed by [`tui-input`]:
+- `Dialog<Ctx>` — an open dialog generic over the host context its callback mutates. Built via `Dialog::text(title, initial, on_done)` (a single free-text field; `on_done: FnOnce(Option<String>, &mut Ctx)`, `None` on cancel) or `Dialog::list(title, items, allow_create, on_done)` (a filter field over a selectable list; `on_done: FnOnce(ListDialogResponse, &mut Ctx)`). Holds a `DialogBody` (`Text`/`List`) plus the boxed callback. The text field is a `tui_input::Input` driven through `InputRequest` (we don't use tui-input's own event backend, avoiding crossterm-version coupling).
+- `ListDialogResponse { Select(String), Create(String), Cancel }` — list outcome: an existing entry, a newly-typed value (only when `allow_create`), or cancel. `DialogResult { Continue, Submit, Cancel }` — what a key event did.
+- `handle_event(&Event) -> DialogResult` — `Esc`→`Cancel`; `Enter`→`Submit` only when OK is enabled (always for text; for a list, a valid entry is selected *or* `allow_create` + non-empty); Up/Down move a list's selection; other keys edit the field (and re-clamp the list selection to the new prefix filter). `finish(result, &mut Ctx)` consumes the dialog and fires its callback. The host pattern: `take()` the dialog out of its slot on `Submit`/`Cancel`, then call `finish` so the callback gets an un-borrowed `&mut Ctx`.
+- `Dialog::draw(&self, &mut Frame)` — dims the screen, draws a centered bordered box. A **text** dialog centers its field box (h+v) with a distinct `FIELD_BG` background so it reads as an input box; a **list** dialog puts the filter field atop the scrolling, selection-highlighted list. Both show an `[enter] OK   [esc] Cancel` footer (OK dimmed when disabled). Takes `&mut Frame` (not a `Widget`) because it needs to place a real terminal cursor. Unit-tested (filtering/clamping, OK-enabled rule, Select/Create/Cancel/text outcomes) with a dummy `Ctx`.
+
 ### kiln-tui modules
 
-The terminal player. Renders the board as text: each `Glyph.tile` index is reinterpreted as a character (the default kiln font is CP437, where the tile index equals the code point) and drawn with the glyph's RGB colors. No bitmap font or UV mapping is involved.
+The terminal **player + world editor**, depending on both `kiln-core` and `kiln-ui`. Renders the board as text: each `Glyph.tile` index is reinterpreted as a character (the default kiln font is CP437, where the tile index equals the code point) and drawn with the glyph's RGB colors. No bitmap font or UV mapping is involved. The app is one of two top-level [`Mode`]s — `Play` (live, ticking game) or `Edit` (a freshly reloaded, non-ticking world) — and the active mode plus a `Ui` value are threaded through the loop.
 
-**Drawing rule: prefer ratatui primitives.** Before writing manual cell-by-cell buffer code, check whether a `Block`, `Paragraph`, `Layout`, `Line::centered()`, or other ratatui widget/method achieves the same result. If a small design change (e.g. fixed vs. content-driven sizing) would unlock a ratatui-native approach, raise it as a question rather than writing manual code. The documented exceptions are: the background dimming pass in `ScrollOverlayWidget` (no ratatui primitive for "tint the whole buffer"), and the tail characters in `SpeechBubblesWidget` (`speech.rs`): the tail-join `┬` on the bottom border and the `│` column drawn below the box down to the source object.
+**Drawing rule: prefer ratatui primitives.** Before writing manual cell-by-cell buffer code, check whether a `Block`, `Paragraph`, `Layout`, `Line::centered()`, or other ratatui widget/method achieves the same result. If a small design change (e.g. fixed vs. content-driven sizing) would unlock a ratatui-native approach, raise it as a question rather than writing manual code. The documented exceptions are: the background dimming pass (`kiln_ui::dim_area`, used by `render_overlay_frame` and the dialog widgets — no ratatui primitive for "tint the whole buffer"); the tail characters in `SpeechBubblesWidget` (`speech.rs`): the tail-join `┬` on the bottom border and the `│` column drawn below the box down to the source object; and the blinking editor cursor + LFSR wipe blend.
 
-**`kiln-tui/src/main.rs`** — entry point and play loop:
-- Parses a single positional arg (the world file path); prints usage and exits non-zero if missing. Loads the world via `kiln_core::world::load` *before* touching the terminal so load errors print to a normal screen, then calls `GameState::from_world(world)` to start on the world's designated start board.
-- `ratatui::init()` → detect `TerminalCaps` → push Kitty flags when supported → `run` loop → pop Kitty flags → `ratatui::restore()`.
-- `run` is a ~30 FPS real-time loop: it `event::poll`s only until the next frame deadline (so input stays responsive) and otherwise wakes to advance the game by the real elapsed `dt` via `GameState::tick`. It acts on `Press` **and** `Repeat` key events (so holding a key moves continuously) and ignores `Release` (which the Kitty protocol also emits, and which would otherwise double-fire each move). Arrow keys move the player via `GameState::try_move`; `l` toggles the log panel; `q`/`Esc` quit. Mouse capture is enabled so the log panel scrolls (wheel) and resizes (drag the divider). `game.run_init()` runs object `init()` hooks after the board is loaded and before the loop. When `game.active_scroll` is `Some`, all input is redirected to scroll navigation (Up/Down to scroll, letter keys for choices, Esc to dismiss if no choices); `game.tick()` is skipped until the overlay is closed.
-- `draw` wraps the board in a bordered `Block` titled with the board name and controls. When the log panel is closed, the latest log line is previewed in the bottom-left border after a `[l]og:` label; when open, a bottom panel lists the log newest-first (`render::logline_to_line` converts each `LogLine`). The scroll overlay is drawn last (above everything) by `render::draw_scroll_overlay`.
-- `Ui { log: LogState, overlay: ScrollOverlayState }` — view-only panel state kept in the front-end (not on `GameState`). `Ui::tick(dt, game)` advances animations, dispatches finished close events, and ticks the game when no overlay is blocking. `begin_close(choice)` starts the close animation.
+**`kiln-tui/src/main.rs`** — entry point, real-time loop, and frame dispatch:
+- Parses a single positional arg (the world file path); prints usage and exits non-zero if missing. Loads the world via `kiln_core::world::load` *before* touching the terminal so load errors print to a normal screen, then `GameState::from_world(world)`, wrapped in `Mode::Play`. The world path is kept on `Ui::world_path` so the editor / play-reload can reload it.
+- `ratatui::init()` → `EnableMouseCapture` → detect `TerminalCaps` → push Kitty flags when supported → `run` loop → pop Kitty flags → `DisableMouseCapture` → `ratatui::restore()`. `game.run_init()` runs object `init()` hooks before the loop.
+- `run` is a ~30 FPS real-time loop: `event::poll`s only until the next frame deadline (so input stays responsive) and otherwise wakes to advance by the real elapsed `dt` via `Ui::tick(dt, mode)`. Acts on `Press`/`Repeat` and ignores `Release` (the Kitty protocol emits these; acting on them double-fires moves). Input is routed by `current_input_mode`: `Menu`→`handle_menu_input`; otherwise (unless `Ignore`) it matches on `Mode` — `Play` → `handle_board_input`/`handle_scroll_input`, `Edit` → `handle_editor_input`/`handle_dialog_input`. After ticking it calls `apply_pending_mode` and exits once `should_quit` is set and no close animation is running.
+- `apply_pending_mode(mode, ui)` — applies a `PendingMode` a menu action requested: reloads the world from `world_path` and swaps `*mode` to `Mode::Edit(EditorState::new(world))` (enter editor) or a fresh `Mode::Play` (play world, re-running `init()`); a reload failure is logged to the play game and leaves the mode unchanged.
+- `draw(frame, mode, ui)` — renders the active mode (`draw_play` or `editor::draw_editor`), then the overlay layer in precedence **animation > menu > (Play: scroll / Edit: dialog)**: an `Overlay`-layer animation via `AnimWidget`, else `MenuWidget`, else the play scroll overlay (`ScrollOverlayWidget`) or the editor dialog (`kiln_ui::dialog::draw`). `draw_play` wraps the board in a bordered `Block` (board-name title; latest log previewed in the bottom border when the panel is closed). `draw_board_area` initializes a pending portal transition (now that the inner area is known) and renders either the board-layer wipe animation or the live board + speech bubbles.
+
+**`kiln-tui/src/mode.rs`** — top-level application mode:
+- `Mode { Play(GameState), Edit(EditorState) }` — exactly one is live at a time (play and edit are mutually exclusive: entering the editor drops the running game; returning to play rebuilds it fresh from the world file). `PendingMode { EnterEditor, PlayWorld }` — a deferred Play↔Edit switch requested by a menu closure (which only has `&mut Ui`) and applied by the run loop, mirroring the `should_quit` pattern.
+
+**`kiln-tui/src/editor.rs`** — world editor mode:
+- `EditorState` — a non-ticking editing session over a freshly reloaded `World`: `world`, `board_name` (board being edited), `menu: Vec<MenuLevel>` (sidebar menu stack, for breadcrumb + escape-to-parent), `dialog: Option<Dialog<EditorState>>`, a blinking `cursor`, `sidebar_width` (mouse-resizable), blink state, `last_board_area` (written at draw, read for right-click hit-testing), and editor-side `log`.
+- `MenuLevel { World }` — a sidebar menu level; `title()` (breadcrumb segment) and `choices()` (static `(key, label)` list — `[n] Name`, `[e] Entry board`, `[s] Scripts`, `[b] Boards`). The menu is a stack so nested levels can be added later; today only `World` exists and every choice opens a dialog (no sub-menu). Per the design, menus are static letter-keyed lists — picking from a list is always a dialog, so arrow keys never conflict with the board cursor.
+- Methods: `breadcrumb()`, `current_menu()`, `menu_escape(ui)` (pop a level, or at the root open the overlay `editor_menu_items()`), `menu_key(c)` (dispatch a letter → `open_*_dialog`), `menu_value(key)` (the "current value" shown beneath a choice in the sidebar — world name for `n`, start board for `e`), and the `open_{name,entry,scripts,boards}_dialog` builders (name → text dialog writing `world.name`; entry → list dialog writing `world.start`; scripts/boards → select-only list dialogs for now).
+- `editor_menu_items()` — the overlay editor menu (`[p]` play, `[q]` quit, `[esc]` resume), opened at the root of the menu tree. `handle_dialog_input(event, ed)` — forwards to the open dialog and, on `Submit`/`Cancel`, `take`s it out and calls `finish(.., ed)`. `draw_editor(frame, ed, ui)` / `editor_layout(..)` — board (with blinking cursor + coord readout), a resizable right-hand sidebar (breadcrumb title + the menu choices, each with its optional current-value line), and the optional full-width log panel.
+
+**`kiln-tui/src/ui.rs`** — front-end presentation state (not on `GameState`):
+- `Ui { log: LogState, overlay: ScrollOverlayState, pending_transition, active_animation: Option<Box<dyn Animation>>, menu: Option<MenuState>, should_quit, world_path, pending_mode }`. While `active_animation` is `Some` all input is suppressed. `tick(dt, mode)` advances the active animation (and, on completion, clears scroll/menu state when returning to `Board`), then ticks the active mode — the game only in `Play` + `Board` input mode (so an open scroll/menu pauses it), the editor's cursor blink in `Edit`; a scroll that appears from a tick starts an open animation.
+- `open_menu(items)` / `begin_close_menu()` — start the menu open/close animations (snapshotting `MenuState`). `begin_close(choice, game)` — set the player's scroll choice and start the scroll close animation. `start_transition(old, new, area)` — build the board-wipe once the inner area is known. `scroll_lines(delta)` / `scroll_menu(delta)` — clamped overlay/menu scrolling.
+
+**`kiln-tui/src/input.rs`** — input mode + dispatch:
+- `InputMode { Board, Scroll, Menu, Editor, Dialog, Ignore, Frozen }`. `current_input_mode(mode, ui)` — derives the mode: an active animation declares its own (`input_mode_during`); a pending transition → `Ignore`; an open `ui.menu` → `Menu`; else from `Mode` (`Edit` → `Dialog` when a dialog is open else `Editor`; `Play` → `Scroll` when a scroll is active else `Board`).
+- `handle_board_input` (arrows move the player via `try_move_with_transition`, `l` toggles log, `Esc` opens the `pause_menu_items()` overlay, PageUp/Down + mouse scroll/resize the log), `handle_editor_input` (arrows move the cursor, `l` toggles log, `Esc` → `menu_escape`, letters → `menu_key`, right-click moves the cursor, drag resizes the sidebar), `handle_scroll_input` (scroll nav + choice letters via `resolve_choice`), `handle_menu_input` (clone the matched item's action `Rc` to drop the `ui.menu` borrow, then call it). `try_move_with_transition` captures both board `Rc`s into `ui.pending_transition` when a move crosses a portal.
+
+**`kiln-tui/src/animation.rs`** — the animation abstraction:
+- `Animation` trait — `update(dt) -> bool` (done?), `draw(area, buf)`, `layer()`, `input_mode_during()` (default `Ignore`), `input_mode_after()`. `AnimationLayer { Board, Overlay }` (board-area replacement vs. full-screen overlay). `AnimWidget<'a>(&'a dyn Animation)` — adapts an animation to a ratatui `Widget` for `frame.render_widget`.
+
+**`kiln-tui/src/transition.rs`** — board-change wipe:
+- `TransitionAnimation` — pre-renders the old and new boards into off-screen `Buffer`s, then reveals cells in an LFSR-driven pseudo-random order over `TRANSITION_DURATION` (0.25 s), blending old/new per cell in `draw`. A `Board`-layer animation that ends in `InputMode::Board`. `lfsr_step`/`lfsr_sequence` build the maximal-period permutation (16-bit Galois LFSR, poly `0xB400`).
+
+**`kiln-tui/src/overlay.rs`** — shared overlay window frame:
+- `OverlayStyle { bg, border_fg, width_div, height_fraction }` and `render_overlay_frame(style, progress, area, buf) -> Option<(content_rect, scrollbar_rect)>` — dims the background (via `kiln_ui::dim_area`), sizes/centers an animated-height window (kept even), draws the bordered block, and returns the content + scrollbar rects. Shared by `menu.rs` and `scroll_overlay.rs`. (The dialog widgets in kiln-ui draw their own smaller box and only reuse `dim_area`.)
+
+**`kiln-tui/src/menu.rs`** — in-game menu overlay:
+- `MenuItem { key: MenuKey, label, action: Rc<dyn Fn(&mut Ui)> }` (`ActionRc`) and `MenuKey { Char(char), Esc }` — menu actions only touch `Ui` (signal close/quit/`pending_mode`), so the same shape works for play and editor menus. `MenuState { items, offset, max_scroll }`, `MenuWidget` (fully-open `StatefulWidget`), and `MenuOpenAnimation`/`MenuCloseAnimation` (share the `Animation` pipeline + `render_overlay_frame`, blue style). `render_menu_at(..)` draws one `[key] label` line per item. `pause_menu_items()` — the play-mode pause menu (`[e]` edit, `[q]` quit, `[esc]` close).
+
+**`kiln-tui/src/scroll_overlay.rs`** — scroll overlay widget:
+- `ScrollOverlayState { offset, max_scroll }` — input/output state threaded through render. `ScrollOverlayWidget<'a>` — `StatefulWidget` for the fully-open overlay (½ width × ¾ height, amber style); `ScrollOpenAnimation`/`ScrollCloseAnimation` implement `Animation` for the open/close transitions. `render_scroll_at(..)` wraps text, centers whitespace-leading lines, prefixes choices with `[a]`/`[b]`, and draws a scrollbar when content overflows.
 
 **`kiln-tui/src/cp437.rs`** — CP437 → Unicode mapping:
 - `CP437: [char; 256]` — full code-page-437 table (graphic glyphs for 0x00–0x1F, box-drawing for 0xB0–0xDF, etc.).
@@ -147,6 +194,7 @@ The terminal player. Renders the board as text: each `Glyph.tile` index is reint
 
 **`kiln-tui/src/render.rs`** — board → ratatui buffer:
 - `BoardWidget<'a>` — a `ratatui::widgets::Widget` that draws the board. Per axis, `axis(board_len, view, player) -> (offset, pad, count)` (pub): a board smaller than the viewport is **centered** with screen padding, a larger one **scrolls** to keep the player on screen with no empty margins. Each cell calls `Board::glyph_at`, which already folds in the player glyph at the player's position — no separate player-overlay pass needed.
+- `board_to_screen(area, board, bx, by) -> Option<(u16, u16)>` and its inverse `screen_to_board(area, board, sx, sy) -> Option<(usize, usize)>` (pub) — convert between board cells and terminal coordinates using the same `axis` math, returning `None` off-board. Used by the editor's blinking cursor + right-click hit-testing (and mirrored by `speech::board_screen_pos`).
 
 **`kiln-tui/src/speech.rs`** — speech bubble widget:
 - `SpeechBubblesWidget<'a>` — a `ratatui::widgets::Widget` that draws speech bubbles for all active `SpeechBubble`s over the board. Two-pass: first collects all placements (sorted bottom-first so upward-shift decisions don't interfere with higher bubbles), then renders in **reverse** order (top-most first) so lower bubbles' boxes naturally cover extended tails without an explicit occlusion check.
@@ -154,20 +202,6 @@ The terminal player. Renders the board as text: each `Glyph.tile` index is reint
 - `place_bubble(area, obj_sx, obj_sy, lines, placed) -> Option<Rect>` — sizes and places one bubble, appending its rect to `placed` on success.
 - `board_screen_pos(area, board, bx, by) -> Option<(u16, u16)>` — converts a board cell coordinate to terminal screen coordinates, returning `None` if off-screen. Used by bubble placement.
 
-**`kiln-tui/src/scroll_overlay.rs`** — scroll overlay widget:
-- `ScrollAnimState { Opening(f32), Open, Closing(f32), Done }` — open/close animation progress (0.0–1.0). `Done` signals the caller to dispatch the pending choice and reset state.
-- `ScrollOverlayState { offset, max_scroll, anim, pending_choice }` — threaded through render as `StatefulWidget` state. `advance_anim(dt)` ticks the animation; `close_finished()` / `take_choice()` let the caller dispatch when `Done`. `max_scroll` is an output written during render.
-- `ScrollOverlayWidget<'a>` — `StatefulWidget` that dims the background, renders a bordered window at ½ width × ¾ height with animated height (forced even), wraps text, centers whitespace-leading lines, prefixes choices with `[a]`/`[b]`, and renders a scrollbar when content overflows.
-
-**`kiln-tui/src/ui.rs`** — top-level front-end state:
-- `Ui { log: LogState, overlay: ScrollOverlayState }` — aggregates all presentation state. `tick(dt, game)` advances animations, dispatches finished close events, ticks the game when no overlay blocks, and starts the open animation when a new scroll appears. `scroll_lines(delta)` adjusts `overlay.offset`. `begin_close(choice)` starts the closing animation (uses current opening progress if still animating in).
-
-**`kiln-tui/src/input.rs`** — input dispatch:
-- `InputMode { Board(bool), Scroll }` — which input mode is active; `Board(log_open)` for normal play, `Scroll` when the overlay is blocking.
-- `current_input_mode(game, ui) -> InputMode` — derives mode from game + animation state.
-- `handle_board_input(event, log_open, terminal_h, game, ui) -> bool` — processes arrow keys (move player), `l` (toggle log), `q`/`Esc` (quit), PageUp/Down (scroll log), mouse drag (resize log). Returns `true` if the player quit.
-- `handle_scroll_input(event, game, ui)` — processes Up/Down (scroll), letter keys (select choice via `resolve_choice`), Esc (dismiss if no choices), mouse wheel.
-
 **`kiln-tui/src/log.rs`** — log panel widget:
 - `LogState { open, height, scroll }` — panel visibility, height in rows, and scroll offset. `toggle()`, `scroll_by(delta, log_len)`, `resize(target, total)`.
 - `LogWidget<'a>` — `StatefulWidget` that renders all log lines newest-first in a bordered block with word-wrap.
@@ -295,5 +329,5 @@ Today's baked-in assumptions that will need to change (don't make `Board.player`
 
 - **Scripting growth** — more event hooks beyond `init`/`tick`/`bump` (e.g. `on_touch` when the player steps onto an object), a larger action/read vocabulary (more actions could carry a `time_cost`), and persisting script-local state across ticks (needs `call_fn_raw` so the per-object `Scope` isn't rewound each call).
 - **Runtime spawn/destroy of objects** — objects now have stable `ObjectId`s (`Board::objects` is a `BTreeMap<ObjectId, ObjectDef>` with a `next_object_id` counter; `add_object` allocates), so references survive reordering. What's still missing: a `remove_object`, and wiring live spawn/destroy into the `ScriptHost` (it builds one `ObjectRuntime` per object once in `GameState::new`, so an object added after that has no script runtime until the host is rebuilt).
-- **Portals & multi-board** — `PortalDef` is parsed but not runtime-wired. Multi-board world loading **is done**: `world::load` loads all boards as `Rc<RefCell<Board>>`, `GameState` owns the whole `World` and tracks `current_board_name`. What's still missing: a `GameState::enter_board(name)` method that updates `current_board_name` and rebuilds the `ScriptHost` for the new board's objects.
+- **Portals & multi-board** — **done**: `world::load` loads all boards as `Rc<RefCell<Board>>`, `GameState` owns the whole `World` and tracks `current_board_name`. `try_move` detects stepping onto a portal and calls `GameState::enter_board(target_map, target_entry)`, which switches `current_board_name`, places the player at the named arrival portal, clears per-board transient state (speech/scroll), rebuilds the `ScriptHost` for the new board, re-runs `init()`, and sets `board_transition` as a hook. kiln-tui detects the board change in `try_move_with_transition` and plays the `TransitionAnimation` wipe. (Errors — missing target board or entry — are logged, not fatal.)
 - **Load-error surfacing** — `Board::load_errors()` is collected but no front-end displays it yet (kiln-tui could append it to the in-game log at startup).