fix: remove folder intro panels across surfaces

tests/project-scoped-realtime-refresh.test.ts

@@ -101,6 +101,26 @@ test("folder conversation page wires folder thread ids into realtime refresh", a
   assert.match(folderPage, /"conversation\.updated"/, "expected folder page to listen to conversation updates");
 });
 
+test("folder conversation page does not render a redundant intro card before the thread list", async () => {
+  const folderPage = await readWorkspaceFile("src/app/conversations/folders/[folderKey]/page.tsx");
+
+  assert.doesNotMatch(
+    folderPage,
+    /rounded-2xl border border-\[#E5E5EA\] bg-white px-4 py-4/,
+    "expected folder page to skip the standalone intro card",
+  );
+  assert.doesNotMatch(
+    folderPage,
+    /folder\.deviceName/,
+    "expected folder page to avoid repeating device info above the thread list",
+  );
+  assert.doesNotMatch(
+    folderPage,
+    /folder\.threadCount/,
+    "expected folder page to avoid repeating thread count above the thread list",
+  );
+});
+
 test("forward page wires realtime refresh for visible source and target projects", async () => {
   const forwardPage = await readWorkspaceFile("src/app/conversations/[projectId]/forward/page.tsx");