diff --git a/src/app/conversations/page.tsx b/src/app/conversations/page.tsx
index 918282d..191e69b 100644
--- a/src/app/conversations/page.tsx
+++ b/src/app/conversations/page.tsx
@@ -7,7 +7,7 @@ import {
   StatusBar,
 } from "@/components/app-ui";
 import { requirePageSession } from "@/lib/boss-auth";
-import { getConversationHomeItems } from "@/lib/boss-projections";
+import { getConversationWebItems } from "@/lib/boss-projections";
 import { readState } from "@/lib/boss-data";
 
 export const dynamic = "force-dynamic";
@@ -15,7 +15,7 @@ export const dynamic = "force-dynamic";
 export default async function ConversationsPage() {
   await requirePageSession();
   const state = await readState();
-  const conversations = getConversationHomeItems(state);
+  const conversations = getConversationWebItems(state);
 
   return (
     <AppShell>
diff --git a/src/lib/boss-projections.ts b/src/lib/boss-projections.ts
index 588705e..a726af6 100644
--- a/src/lib/boss-projections.ts
+++ b/src/lib/boss-projections.ts
@@ -660,6 +660,14 @@ export function getConversationHomeItems(state: BossState): ConversationItem[] {
   return sortConversationItems(passthrough);
 }
 
+export function getConversationWebItems(state: BossState): ConversationItem[] {
+  return getConversationHomeItems(state).map((item) => ({
+    ...item,
+    topPinnedLabel: undefined,
+    manualPinned: false,
+  }));
+}
+
 export function getConversationHomeItemForProject(state: BossState, projectId: string): ConversationItem | null {
   const normalizedProjectId = projectId.trim();
   if (!normalizedProjectId) {
diff --git a/tests/conversation-home-items.test.ts b/tests/conversation-home-items.test.ts
index 84d23ea..eac0758 100644
--- a/tests/conversation-home-items.test.ts
+++ b/tests/conversation-home-items.test.ts
@@ -8,6 +8,7 @@ let runtimeRoot = "";
 let readState: (typeof import("../src/lib/boss-data"))["readState"];
 let updateConversationAction: (typeof import("../src/lib/boss-data"))["updateConversationAction"];
 let getConversationHomeItems: (typeof import("../src/lib/boss-projections"))["getConversationHomeItems"];
+let getConversationWebItems: (typeof import("../src/lib/boss-projections"))["getConversationWebItems"];
 let getConversationHomeItemForProject: (typeof import("../src/lib/boss-projections"))["getConversationHomeItemForProject"];
 let getConversationThreadItemForProject: (typeof import("../src/lib/boss-projections"))["getConversationThreadItemForProject"];
 let getConversationFolderView: (typeof import("../src/lib/boss-projections"))["getConversationFolderView"];
@@ -31,6 +32,7 @@ async function setup() {
   readState = data.readState;
   updateConversationAction = data.updateConversationAction;
   getConversationHomeItems = projections.getConversationHomeItems;
+  getConversationWebItems = projections.getConversationWebItems;
   getConversationHomeItemForProject = projections.getConversationHomeItemForProject;
   getConversationThreadItemForProject = projections.getConversationThreadItemForProject;
   getConversationFolderView = projections.getConversationFolderView;
@@ -770,6 +772,65 @@ test("homepage rows do not expose pinned labels in the Web surface", async () =>
   assert.equal(getConversationPinnedBadgeLabel(masterAgent!), "");
 });
 
+test("web conversation projection strips pin metadata before rendering the Mac/Web surface", async () => {
+  await setup();
+  const state = await readState();
+
+  state.projects = state.projects.filter((project) => project.id === "master-agent");
+  state.projects.push(
+    {
+      ...buildImportedThreadProject(
+        "mac-studio",
+        "solo-pinned-thread",
+        "Solo",
+        "solo",
+        "单线程置顶验证",
+        "solo-thread",
+        "2026-03-30T13:00:00+08:00",
+      ),
+      pinned: true,
+    },
+    {
+      ...buildImportedThreadProject(
+        "mac-studio",
+        "boss-thread-1",
+        "Boss",
+        "boss",
+        "归档确认",
+        "thread-1",
+        "2026-03-30T11:00:00+08:00",
+      ),
+      pinned: true,
+    },
+    buildImportedThreadProject(
+      "mac-studio",
+      "boss-thread-2",
+      "Boss",
+      "boss",
+      "发布回滚",
+      "thread-2",
+      "2026-03-30T12:00:00+08:00",
+    ),
+  );
+
+  const webItems = getConversationWebItems(state);
+  const pinnedThread = webItems.find((item) => item.projectId === "solo-pinned-thread");
+  const folder = webItems.find((item) => item.conversationType === "folder_archive");
+  const masterAgent = webItems.find((item) => item.projectId === "master-agent");
+
+  assert.ok(pinnedThread, "expected pinned thread in web projection");
+  assert.equal(pinnedThread?.topPinnedLabel, undefined);
+  assert.equal(pinnedThread?.manualPinned, false);
+
+  assert.ok(folder, "expected folder archive in web projection");
+  assert.equal(folder?.topPinnedLabel, undefined);
+  assert.equal(folder?.manualPinned, false);
+
+  assert.ok(masterAgent, "expected master agent in web projection");
+  assert.equal(masterAgent?.topPinnedLabel, undefined);
+  assert.equal(masterAgent?.manualPinned, false);
+});
+
 test("folder archive action path encodes folder keys with nested path segments", async () => {
   await setup();
 
diff --git a/tests/conversation-web-surface.test.ts b/tests/conversation-web-surface.test.ts
new file mode 100644
index 0000000..af82339
--- /dev/null
+++ b/tests/conversation-web-surface.test.ts
@@ -0,0 +1,29 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import path from "node:path";
+import { readFile } from "node:fs/promises";
+import { fileURLToPath } from "node:url";
+
+const testsDir = path.dirname(fileURLToPath(import.meta.url));
+
+async function readWorkspaceFile(relativePath: string) {
+  return readFile(path.join(testsDir, "..", relativePath), "utf8");
+}
+
+test("web conversations page uses a web-specific projection without pin metadata", async () => {
+  const [pageSource, projectionsSource] = await Promise.all([
+    readWorkspaceFile("src/app/conversations/page.tsx"),
+    readWorkspaceFile("src/lib/boss-projections.ts"),
+  ]);
+
+  assert.match(
+    projectionsSource,
+    /export function getConversationWebItems\(/,
+    "expected a web-specific conversation projection helper",
+  );
+  assert.match(
+    pageSource,
+    /const conversations = getConversationWebItems\(state\);/,
+    "expected the web conversations page to use the web-specific projection",
+  );
+});