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>

tests/mart-browser.spec.ts

@@ -0,0 +1,78 @@
+import { test, expect, type Page } from "@playwright/test";
+import { existsSync, readFileSync } from "node:fs";
+import { resolve } from "node:path";
+
+const romPath = resolve(process.env.CRYSTAL_ROM_PATH ?? "Pokemon - Crystal Version (UE) (V1.1) [C][!].gbc");
+
+async function start(page: Page) {
+  // Replace only this test's runtime module response, the same way
+  // battle-browser.spec.ts substitutes an encounter fixture: no fixture
+  // import or map override exists in the application or production build.
+  await page.route("**/src/game/runtime.ts", async (route) => {
+    const response = await route.fetch();
+    const source = await response.text();
+    const needle = "const world = new GameWorld(assets);";
+    expect(source).toContain(needle);
+    await route.fulfill({ response, body: source.replace(needle,
+      `const { martFixtureWorld } = await import('/tests/mart-fixture.ts');
+       const world = martFixtureWorld(assets);`) });
+  });
+  await page.clock.install({ time: new Date("2026-09-22T12:00:00") });
+  await page.goto("/");
+  await page.locator("#rom-file").setInputFiles(romPath);
+  await expect(page.locator("#status")).toContainText("verified");
+  await page.clock.pauseAt(new Date("2026-09-22T12:05:00"));
+  await page.locator("#play").click();
+}
+
+async function exportState(page: Page) {
+  await page.locator("#tab-saves").click();
+  const download = page.waitForEvent("download");
+  await page.locator("#backup").click();
+  const path = (await (await download).path())!;
+  const record = JSON.parse(readFileSync(path, "utf8"));
+  await page.locator("#tab-game").click();
+  return JSON.parse(Buffer.from(record.state, "base64").toString("utf8"));
+}
+
+test.beforeEach(() => test.skip(!existsSync(romPath), "Requires the local user ROM; only map-enabling is a test fixture."));
+
+test("buys a Potion from the Cherrygrove clerk with the keyboard", async ({ page }) => {
+  await start(page);
+
+  // The fixture places the player at the counter, already facing the clerk.
+  await page.keyboard.press("KeyX");
+  await expect(page.locator("#mart")).toBeVisible();
+  await expect(page.locator("#mart-menu")).toContainText("BUY");
+
+  await page.keyboard.press("KeyX"); // BUY is already highlighted
+  await expect(page.locator("#mart-menu")).toContainText("POTION");
+
+  await page.keyboard.press("KeyX"); // the Potion is first and already highlighted
+  await expect(page.locator(".mart-quantity output")).toHaveText(/×1/);
+  await page.keyboard.press("ArrowUp"); // quantity 2, exercising the stepper
+  await expect(page.locator(".mart-quantity output")).toHaveText(/×2/);
+
+  await page.keyboard.press("KeyX"); // confirm the quantity
+  await expect(page.locator("#dialogue-text")).toContainText("will be");
+  await expect(page.locator("#dialogue-choice")).toContainText("YES");
+  await page.keyboard.press("KeyX"); // YES is already highlighted
+
+  await expect(page.locator("#dialogue-text")).toContainText("Here you are");
+  await page.keyboard.press("KeyX"); // continue
+
+  // Back at the item list (BuyMenu loops for another purchase); leave.
+  await expect(page.locator("#mart-menu")).toContainText("POTION");
+  await page.keyboard.press("KeyZ"); // back out of the list
+  await page.keyboard.press("KeyZ"); // quit the BUY/SELL/QUIT menu
+
+  await expect(page.locator("#dialogue-text")).toContainText("Please come again");
+  await page.keyboard.press("KeyX");
+
+  await expect(page.locator("#mart")).toBeHidden();
+  await expect(page.locator("#game-notice")).toHaveText("");
+
+  const state = await exportState(page);
+  expect(state.money).toBe(3000 - 300 * 2);
+  expect(state.bag.items).toEqual([{ item: 18, quantity: 2 }]);
+});