fix: address PR review feedback (round 2)

Bug fixes:
- Catch OCSError/HTTPStatusError in all server tools, convert to McpError
- Guard update_collective against empty body (raise ValueError)
- Use restore_page response data in status message

ADR-017 annotation fix:
- Distinguish "remove" (reversible association) from "delete" (permanent):
  remove_tag and deck_remove_label_from_card no longer set destructiveHint
- Update annotation test to exclude "remove" from destructive keywords

Data model improvements:
- Add trashTimestamp field to PageInfo
- Create ListTrashedPagesResponse with is_trash context flag
- Add collective_id to ListTagsResponse

Test robustness:
- Read NC credentials from environment variables (not hardcoded)
- Filter landing page by parentId == 0 instead of assuming pages[0]

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

nextcloud_mcp_server/client/collectives.py

@@ -71,10 +71,16 @@ class CollectivesClient(BaseNextcloudClient):
     async def update_collective(
         self, collective_id: int, emoji: str | None = None
     ) -> dict[str, Any]:
-        """Update a collective (emoji)."""
+        """Update a collective (emoji).
+
+        Raises:
+            ValueError: If no fields are provided to update.
+        """
         json_data: dict[str, Any] = {}
         if emoji is not None:
             json_data["emoji"] = emoji
+        if not json_data:
+            raise ValueError("At least one field must be provided to update")
         response = await self._make_request(
             "PUT",
             f"{API_BASE}/collectives/{collective_id}",