2 files changed, 16 insertions, 2 deletions
diff --git a/frontend-vanilla/src/main.test.ts b/frontend-vanilla/src/main.test.ts
index eb9e615..40acd83 100644
--- a/frontend-vanilla/src/main.test.ts
+++ b/frontend-vanilla/src/main.test.ts
@@ -371,14 +371,20 @@ describe('main application logic', () => {
         expect(apiFetch).toHaveBeenCalledWith('/api/feed/123', expect.objectContaining({ method: 'DELETE' }));
     });
 
-    it('updateFeed should call API', async () => {
+    it('updateFeed should call API with merged data', async () => {
+        store.setFeeds([{ _id: 123, title: 'Test Feed', url: 'http://example.com' } as any]);
         vi.mocked(apiFetch).mockResolvedValueOnce({ ok: true } as Response);
         const { updateFeed } = await import('./main');
         await updateFeed(123, { category: 'New Tag' });
+
         expect(apiFetch).toHaveBeenCalledWith('/api/feed', expect.objectContaining({
             method: 'PUT',
             body: expect.stringContaining('"category":"New Tag"')
         }));
+        // Should verify it merged the title
+        expect(apiFetch).toHaveBeenCalledWith('/api/feed', expect.objectContaining({
+            body: expect.stringContaining('"title":"Test Feed"')
+        }));
     });
 
     it('renderSettings should show manage feeds section', () => {
diff --git a/frontend-vanilla/src/main.ts b/frontend-vanilla/src/main.ts
index b826760..418b9be 100644
--- a/frontend-vanilla/src/main.ts
+++ b/frontend-vanilla/src/main.ts
@@ -552,11 +552,19 @@ export async function deleteFeed(id: number): Promise<boolean> {
 }
 
 export async function updateFeed(id: number, updates: Partial<Feed>): Promise<boolean> {
+  const existing = store.feeds.find(f => f._id === id);
+  if (!existing) {
+    console.error('Feed not found in store', id);
+    return false;
+  }
+
+  const payload = { ...existing, ...updates };
+
   try {
     const res = await apiFetch('/api/feed', {
       method: 'PUT',
       headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ ...updates, _id: id })
+      body: JSON.stringify(payload)
     });
     return res.ok;
   } catch (err) {