fix bounding box in tracking mode

tests/e2e/track.spec.ts

@@ -0,0 +1,64 @@
+import { test, expect, openPredict, login } from './fixtures';
+
+test.beforeEach(async ({ context, page }) => {
+	await login(context);
+	await page.goto('/');
+	await page.evaluate(() => localStorage.removeItem('workspaces'));
+});
+
+/** Count map layers whose scoped id belongs to a bounding-box scene. */
+function bboxLayerCount(page: import('@playwright/test').Page) {
+	return page.evaluate(() => {
+		// eslint-disable-next-line @typescript-eslint/no-explicit-any
+		const map: any = (window as any)._lsvMap;
+		if (!map) return 0;
+		return map.getStyle().layers.filter((l: { id: string }) => l.id.startsWith('bbox')).length;
+	});
+}
+
+// Regression: the bounding box is drawn only by WorkspaceRenderer (predict-only).
+// Selecting the same forecast on /track must redraw its box, otherwise it
+// "disappears" the moment the user switches into tracking mode.
+test('selected forecast bounding box is drawn on the tracking page', async ({ page }) => {
+	test.setTimeout(90_000);
+	await openPredict(page);
+
+	const panel = page.locator('.panel-container-right');
+	const runBtn = panel
+		.locator('.workspace-row')
+		.first()
+		.getByRole('button', { name: /Рассчитать|Run/ });
+	await runBtn.click();
+
+	// Wait for the run to complete (workspace scene appears).
+	await expect
+		.poll(
+			() =>
+				page.evaluate(() => {
+					// eslint-disable-next-line @typescript-eslint/no-explicit-any
+					const map: any = (window as any)._lsvMap;
+					if (!map) return 0;
+					return map
+						.getStyle()
+						.layers.filter((l: { id: string }) => l.id.startsWith('ws/')).length;
+				}),
+			{ timeout: 75_000, intervals: [1000, 2000, 3000] },
+		)
+		.toBeGreaterThan(0);
+
+	// Enable the bounding box for this forecast.
+	await panel.getByRole('button', { name: /Построить рамку|Generate bounding box/ }).click();
+	await expect.poll(() => bboxLayerCount(page), { timeout: 10_000 }).toBeGreaterThan(0);
+
+	// Client-side navigate to tracking (a full reload would drop the in-memory
+	// prediction result, which is intentionally not persisted).
+	await page.getByRole('link', { name: /Слежение|Track/ }).click();
+	await page
+		.locator('.map-container canvas')
+		.first()
+		.waitFor({ state: 'attached', timeout: 15_000 });
+
+	// Select the forecast to track against — its box must appear on this map.
+	await page.locator('#forecast-select').selectOption({ index: 1 });
+	await expect.poll(() => bboxLayerCount(page), { timeout: 10_000 }).toBeGreaterThan(0);
+});