Open Route 29 and Cherrygrove City

- Enable Route 29, its Route 46 gate, Cherrygrove City and its buildings.
- Run item balls through FindItemInBallScript and fruit trees through
  FruitTreeScript, with a native daily reset of the daily engine flags.
- Port the Pokémon Center nurse (HealParty with the PP Up clamp,
  CheckPokerus, phone-call checks) and record the whiteout spawn on
  entering a Pokémon Center, as EnterMapWarp does.
- Port standard Poké Marts with keyboard, D-pad and pointer menus.
- Add the recoil battle command (Struggle) and VAR_BOXSPACE.
- Save fruit trees, the daily reset day and the last spawn map; older
  version-3 backups migrate by absence.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/main.ts

@@ -6,7 +6,7 @@ import { LocalMapView } from "./game/rendering/minimap";
 import type { Choice, GameWorld } from "./game/world/world";
 import { drawTile } from "./game/rendering/pixels";
 import { PokemonData } from "./game/rom/pokemon";
-import type { Palette } from "./game/world/types";
+import type { Direction, Palette } from "./game/world/types";
 import type { Button } from "./input/types";
 import { NICKNAME_PATTERN } from "./game/party/pokemon";
 import { GameSession } from "./app/session";
@@ -52,7 +52,8 @@ function showWorld(world: GameWorld) {
   const pictureWait = Boolean(
     dialogue && !dialogue.choice && dialogue.pages[dialogue.index] === "",
   );
-  get("native-dialogue").hidden = !dialogue || pictureWait;
+  const mart = dialogue?.choice && martChoice(dialogue.choice);
+  get("native-dialogue").hidden = !dialogue || pictureWait || Boolean(mart);
   get("pokepic-next").hidden = !pictureWait;
   get("dialogue-text").textContent = dialogue?.pages[dialogue.index] ?? "";
   get("dialogue-page").textContent =
@@ -60,12 +61,13 @@ function showWorld(world: GameWorld) {
       ? `${dialogue.index + 1} / ${dialogue.pages.length}`
       : "";
   const last = dialogue && dialogue.index === dialogue.pages.length - 1;
-  const choice = last ? dialogue.choice : undefined;
+  const choice = last && !mart ? dialogue.choice : undefined;
   // Timed pages advance themselves; choices replace Continue.
   get("dialogue-next").hidden = Boolean(
-    choice || (last && dialogue.holdTicks !== undefined),
+    choice || mart || (last && dialogue.holdTicks !== undefined),
   );
   showChoice(choice);
+  showMart(world, mart);
   // Coordinates provide a stable accessible description and a test observation
   // point, without exposing mutable game state or a production debug API.
   canvas.dataset.map = world.mapId;
@@ -125,7 +127,7 @@ function showChoice(choice: Choice | undefined) {
     );
     container.firstElementChild?.setAttribute("aria-label", "Previous day");
     container.children[2]?.setAttribute("aria-label", "Next day");
-  } else {
+  } else if (choice.kind === "name") {
     // The naming screen: an empty name keeps the current one.
     const input = document.createElement("input");
     input.maxLength = choice.max;
@@ -159,6 +161,112 @@ function showChoice(choice: Choice | undefined) {
     queueMicrotask(() => input.focus({ preventScroll: true }));
   }
 }
+type MartChoice = Extract<
+  Choice,
+  { kind: "martmenu" | "martlist" | "martquantity" }
+>;
+function martChoice(choice: Choice): MartChoice | undefined {
+  return choice.kind === "martmenu" ||
+    choice.kind === "martlist" ||
+    choice.kind === "martquantity"
+    ? choice
+    : undefined;
+}
+let martMenuKey = "";
+/** The mart's BUY/SELL/QUIT box, item list or quantity stepper, plus a
+ * money display. Follows the battle menu's button-grid style. */
+function showMart(world: GameWorld, mart: MartChoice | undefined) {
+  get("mart").hidden = !mart;
+  if (!mart) {
+    martMenuKey = "";
+    return;
+  }
+  get("mart-money").textContent = `MONEY ¥${world.liveState.money}`;
+  get("mart-prompt").textContent = mart.kind === "martlist" ? "" : mart.prompt;
+  const key = JSON.stringify(mart);
+  if (key === martMenuKey) return;
+  martMenuKey = key;
+  const menu = get("mart-menu");
+  const button = (
+    label: string,
+    action: () => void,
+    options: { detail?: string; selected?: boolean; wide?: boolean } = {},
+  ) => {
+    const element = document.createElement("button");
+    element.type = "button";
+    element.textContent = label;
+    if (options.detail) {
+      const small = document.createElement("small");
+      small.textContent = options.detail;
+      element.append(small);
+    }
+    if (options.selected) element.classList.add("battle-selected");
+    if (options.wide) element.classList.add("wide");
+    element.addEventListener("click", () => {
+      if (session.state !== "playing") return;
+      action();
+      canvas.focus({ preventScroll: true });
+    });
+    return element;
+  };
+  if (mart.kind === "martmenu") {
+    menu.replaceChildren(
+      ...(["BUY", "SELL", "QUIT"] as const).map((label, index) =>
+        button(label, () => runtime.choose(index), {
+          selected: mart.selected === index,
+        }),
+      ),
+    );
+    return;
+  }
+  if (mart.kind === "martlist") {
+    const buttons = mart.entries.map((entry, index) =>
+      button(entry.name, () => runtime.choose(index), {
+        detail:
+          mart.mode === "sell" ? `have ${entry.owned}` : `¥${entry.price}`,
+        selected: mart.selected === index,
+      }),
+    );
+    buttons.push(button("BACK", () => runtime.choose(-1), { wide: true }));
+    menu.replaceChildren(...buttons);
+    return;
+  }
+  // martquantity: a 1-99 stepper (±1 Up/Down, ±10 Left/Right, matching
+  // BuySellToss_InterpretJoypad), then BUY/SELL and CANCEL.
+  const total =
+    mart.mode === "sell"
+      ? Math.floor((mart.price * mart.selected) / 2)
+      : mart.price * mart.selected;
+  const stepper = document.createElement("div");
+  stepper.className = "mart-quantity";
+  const step = (label: string, aria: string, direction: Direction) => {
+    const element = document.createElement("button");
+    element.type = "button";
+    element.textContent = label;
+    element.setAttribute("aria-label", aria);
+    element.addEventListener("click", () => {
+      if (session.state !== "playing") return;
+      runtime.world?.moveCursor(direction);
+      if (runtime.world) showWorld(runtime.world);
+      canvas.focus({ preventScroll: true });
+    });
+    return element;
+  };
+  const output = document.createElement("output");
+  output.textContent = `${mart.name} ×${mart.selected}  ¥${total}`;
+  stepper.append(
+    step("◀◀", "Minus 10", "left"),
+    step("▼", "Minus 1", "down"),
+    output,
+    step("▲", "Plus 1", "up"),
+    step("▶▶", "Plus 10", "right"),
+  );
+  menu.replaceChildren(
+    stepper,
+    button(mart.mode === "sell" ? "SELL" : "BUY", () => runtime.choose(mart.selected), { wide: true }),
+    button("CANCEL", () => runtime.choose(-1), { wide: true }),
+  );
+}
 const STATUS_NAMES: [number, string][] = [
   [0x08, "PSN"],
   [0x10, "BRN"],