fix(news): revert get_item() to use get_items() + filter

Reverts the "perf(news): use direct API endpoint for get_item()" change
from commit 92c4bf3 which incorrectly assumed GET /items/{itemId} exists.

The News API (v1-2, v1-3, v2) does not provide a direct endpoint to
retrieve individual items. The only /items/{itemId} routes are POST
operations for marking items read/unread/starred.

Changes:
- Restore original get_item() implementation that fetches all items
  and filters in Python
- Update exception from HTTPStatusError to ValueError
- Restore documentation explaining API limitation
- Update unit tests to mock get_items() instead of _make_request()
- Add test for ValueError when item not found

Fixes vector processor 405 errors when indexing news items.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

nextcloud_mcp_server/client/news.py

@@ -228,6 +228,10 @@ class NewsClient(BaseNextcloudClient):
     async def get_item(self, item_id: int) -> dict[str, Any]:
         """Get a specific item by ID.
 
+        Note: The News API doesn't have a direct single-item endpoint,
+        so we fetch all items and filter. For efficiency, consider
+        caching or using get_items with specific feed if known.
+
         Args:
             item_id: Item ID
 
@@ -235,10 +239,15 @@ class NewsClient(BaseNextcloudClient):
             Item data
 
         Raises:
-            HTTPStatusError: 404 if item not found
+            ValueError: If item not found
         """
-        response = await self._make_request("GET", f"{self.API_BASE}/items/{item_id}")
-        return response.json()
+        # Fetch all items and find the one we need
+        # This is inefficient but the API doesn't provide a direct endpoint
+        items = await self.get_items(batch_size=-1, get_read=True)
+        for item in items:
+            if item.get("id") == item_id:
+                return item
+        raise ValueError(f"Item {item_id} not found")
 
     async def get_updated_items(
         self,

tests/client/news/test_news_api.py

@@ -310,14 +310,16 @@ async def test_news_api_get_items_unread_only(mocker):
 
 
 async def test_news_api_get_item(mocker):
-    """Test that get_item fetches a single item by ID."""
-    item = create_mock_news_item(item_id=123, title="Single Item")
-    mock_response = create_mock_response(status_code=200, json_data=item)
+    """Test that get_item fetches all items and filters for the requested ID."""
+    # Create multiple items, only one should be returned
+    items = [
+        create_mock_news_item(item_id=100, title="Other Item 1"),
+        create_mock_news_item(item_id=123, title="Single Item"),
+        create_mock_news_item(item_id=200, title="Other Item 2"),
+    ]
 
     mock_client = mocker.AsyncMock(spec=httpx.AsyncClient)
-    mock_make_request = mocker.patch.object(
-        NewsClient, "_make_request", return_value=mock_response
-    )
+    mock_get_items = mocker.patch.object(NewsClient, "get_items", return_value=items)
 
     client = NewsClient(mock_client, "testuser")
     result = await client.get_item(item_id=123)
@@ -325,7 +327,24 @@ async def test_news_api_get_item(mocker):
     assert result["id"] == 123
     assert result["title"] == "Single Item"
 
-    mock_make_request.assert_called_once_with("GET", "/apps/news/api/v1-3/items/123")
+    # Verify it fetched all items with correct params
+    mock_get_items.assert_called_once_with(batch_size=-1, get_read=True)
+
+
+async def test_news_api_get_item_not_found(mocker):
+    """Test that get_item raises ValueError when item not found."""
+    items = [
+        create_mock_news_item(item_id=100, title="Item 1"),
+        create_mock_news_item(item_id=200, title="Item 2"),
+    ]
+
+    mock_client = mocker.AsyncMock(spec=httpx.AsyncClient)
+    mocker.patch.object(NewsClient, "get_items", return_value=items)
+
+    client = NewsClient(mock_client, "testuser")
+
+    with pytest.raises(ValueError, match="Item 999 not found"):
+        await client.get_item(item_id=999)
 
 
 async def test_news_api_get_updated_items(mocker):