fix(amazon-shopping): verify prime and delivery filters

skills/amazon-shopping/tests/detail-page.test.ts

@@ -74,4 +74,45 @@ describe("extractDetailPage", () => {
     assert.equal(details.availability, "In Stock");
     assert.deepEqual(details.specs, [{ name: "Wattage", value: "15 watts" }]);
   });
+
+  it("preserves a search-card Prime signal when detail delivery text omits Prime", () => {
+    const details = extractDetailPage(`
+      <h1 id="productTitle">Prime Sofa Bed</h1>
+      <div id="mir-layout-DELIVERY_BLOCK-slot-PRIMARY_DELIVERY_MESSAGE_LARGE">FREE delivery Tomorrow. Details</div>
+      <table>
+        <tr><td>Product Dimensions</td><td>35"D x 83"W x 31"H</td></tr>
+      </table>
+    `, {
+      asin: "B0PRIME123",
+      title: "Prime Sofa Bed",
+      url: "https://www.amazon.com/dp/B0PRIME123",
+      delivery: { display: "FREE delivery Tomorrow", free: true, prime: true },
+      specs: [],
+      bullets: [],
+      matchedFilters: [],
+      missingFields: [],
+      extractionNotes: []
+    });
+
+    assert.equal(details.delivery?.prime, true);
+    assert.equal(details.delivery?.free, true);
+  });
+
+  it("does not treat Prime in a detail title as Prime delivery", () => {
+    const details = extractDetailPage(`
+      <h1 id="productTitle">Prime Sofa Bed</h1>
+      <div id="mir-layout-DELIVERY_BLOCK-slot-PRIMARY_DELIVERY_MESSAGE_LARGE">FREE delivery Tomorrow. Details</div>
+    `, {
+      asin: "B0TITLE123",
+      title: "Prime Sofa Bed",
+      url: "https://www.amazon.com/dp/B0TITLE123",
+      specs: [],
+      bullets: [],
+      matchedFilters: [],
+      missingFields: [],
+      extractionNotes: []
+    });
+
+    assert.equal(details.delivery?.prime, false);
+  });
 });