diff --git a/apps/web/lib/product-overview-persistence.test.ts b/apps/web/lib/product-overview-persistence.test.ts
index 7673df6..811f6bd 100644
--- a/apps/web/lib/product-overview-persistence.test.ts
+++ b/apps/web/lib/product-overview-persistence.test.ts
@@ -7,6 +7,35 @@ test('does not persist an empty remote overview', () => {
   assert.equal(shouldPersistRemoteOverview([]), false);
 });
 
-test('persists a non-empty remote overview', () => {
-  assert.equal(shouldPersistRemoteOverview([{ id: 'product-1' }]), true);
+test('does not persist product-only remote overview', () => {
+  assert.equal(shouldPersistRemoteOverview([{ id: 'product-1' }]), false);
+});
+
+test('does not persist relational products without frontend project or version data', () => {
+  assert.equal(
+    shouldPersistRemoteOverview([
+      {
+        id: 'cmqs07s3900001450gwu9lesi',
+        name: '测试AI任务拆解',
+        projects: [],
+        versions: [],
+        _count: { requirements: 0, projects: 0, versions: 0 },
+      },
+    ]),
+    false,
+  );
+});
+
+test('persists overview with frontend project and version ids', () => {
+  assert.equal(
+    shouldPersistRemoteOverview([
+      {
+        id: 'local-1782301366735',
+        name: '测试AI任务拆解',
+        projects: [{ id: 'proj-1782301375710', name: '任务拆解' }],
+        versions: [{ id: 'ver-1782301431670', name: '任务拆解V1.0', status: 'developing' }],
+      },
+    ]),
+    true,
+  );
 });
diff --git a/apps/web/lib/product-overview-persistence.ts b/apps/web/lib/product-overview-persistence.ts
index ad7e95c..cfad48d 100644
--- a/apps/web/lib/product-overview-persistence.ts
+++ b/apps/web/lib/product-overview-persistence.ts
@@ -1,3 +1,35 @@
 export function shouldPersistRemoteOverview(overview: unknown): boolean {
-  return Array.isArray(overview) && overview.length > 0;
+  if (!Array.isArray(overview) || overview.length === 0) return false;
+  return overview.some(hasFrontendTreeSignal);
+}
+
+function hasFrontendTreeSignal(product: unknown): boolean {
+  if (!isRecord(product)) return false;
+  const projects = Array.isArray(product.projects) ? product.projects : [];
+  const versions = Array.isArray(product.versions) ? product.versions : [];
+  return projects.some(isFrontendProject) || versions.some(isFrontendVersion);
+}
+
+function isFrontendProject(project: unknown): boolean {
+  return (
+    isRecord(project) &&
+    typeof project.id === 'string' &&
+    project.id.startsWith('proj-') &&
+    typeof project.name === 'string'
+  );
+}
+
+function isFrontendVersion(version: unknown): boolean {
+  if (!isRecord(version) || typeof version.id !== 'string' || typeof version.name !== 'string') return false;
+  return (
+    version.id.startsWith('ver-') ||
+    typeof version.status === 'string' ||
+    typeof version.expectedReleaseDate === 'string' ||
+    Array.isArray(version.members) ||
+    typeof version.priority === 'string'
+  );
+}
+
+function isRecord(value: unknown): value is Record<string, unknown> {
+  return typeof value === 'object' && value !== null;
 }