fix(game): no placement auto-zoom in landscape

Landscape fits the whole board, so the coarse-pointer auto-zoom on tile
placement, drag hover-hold and hint only hid the rest of the position.
Gate all three on portrait; manual double-tap/pinch zoom is unchanged.
New e2e lock both sides: landscape placement stays unzoomed, portrait
placement still auto-zooms (touch-emulated, both engines).

ui/e2e/landscape.spec.ts

@@ -53,3 +53,25 @@ test('landscape still places a tile and commits via the make button', async ({ p
   await expect(page.locator('.cell.pending')).toHaveCount(1);
   await expect(page.locator('.make')).toBeVisible();
 });
+
+// Placement auto-zoom is portrait-only (Game.svelte gates it on !landscape): landscape fits the
+// whole board, so magnifying on every placed tile would only hide the position. The gate also
+// requires a coarse pointer, so the block emulates touch and skips on an engine whose emulation
+// does not flip `(pointer: coarse)` (desktop WebKit). The portrait counterpart lives in
+// zoom.spec.ts.
+test.describe('touch placement', () => {
+  test.use({ hasTouch: true });
+
+  test('landscape does not auto-zoom when a tile is placed', async ({ page }) => {
+    await openGame(page);
+    test.skip(
+      !(await page.evaluate(() => matchMedia('(pointer: coarse)').matches)),
+      'touch emulation does not report a coarse pointer in this engine',
+    );
+    await page.locator('.rack .tile').first().click();
+    await page.locator('[data-cell][data-row="9"][data-col="6"]').click();
+    await expect(page.locator('.cell.pending')).toHaveCount(1);
+    await page.waitForTimeout(400); // the would-be zoom transition window
+    await expect(page.locator('.viewport.zoomed')).toHaveCount(0);
+  });
+});