feat(asset-ai): simplify count answers and refine mobile conversation layout

src/server/routes/asset-assistant/model.test.ts

@@ -158,3 +158,11 @@ test("presentation receives authorized aggregates while vehicle rows stay in the
   );
   assert.equal(events.filter((e) => e.type === "step").length, 4);
 });
+
+test("inventory subsets do not inherit parent inventory metric cards", () => {
+  for (const category of ["abnormal", "pending", "available", "awaiting"] as const) {
+    const r = assetResult(vehicles, {kind:"assets", category, groupBy:"none", view:"chart", filters:{}});
+    assert.equal(r.metrics.length, 1, category);
+    assert.doesNotMatch(r.summary, /其中异动.*待交车/);
+  }
+});