feat: add save_item_from_mcp functionality to core services

Co-authored-by: aider (openai/andrew/openrouter/google/gemini-2.5-pro) <aider@aider.chat>

PLAN.md

@@ -8,7 +8,7 @@
 - [x] 5. Add async wrappers for API use
 - [x] 6. Refactor CLI modes to use services (DONE)
 - [x] 7. Refactor REST API to use async services
-- [ ] 8. Refactor MCP tools to use services
+- [x] 8. Refactor MCP tools to use services
 - [x] 9. Create unified error handling
 - [ ] 10. Add integration tests
 - [ ] 11. Add performance optimization guidelines (partially done)
@@ -155,22 +155,22 @@
 - Use common error handling with conversions to HTTP responses
 - Wrap synchronous service calls in `tokio::task::spawn_blocking`
 
-## 8. Refactor MCP Tools to Use Services
+## 8. Refactor MCP Tools to Use Services (DONE)
 **Files:**
-- Change: `src/modes/server/mcp/tools.rs`
+- Change: `src/modes/server/mcp/tools.rs` (DONE)
 
 **Functions:**
-- Change: `save_item` to use `item_service::save_item`
-- Change: `get_item` to use `item_service::get_item_full`
-- Change: `get_latest_item` to use `item_service::get_latest_item`
-- Change: `list_items` to use `item_service::list_items`
-- Change: `search_items` to use `item_service::search_items`
+- Change: `save_item` to use `item_service` (DONE)
+- Change: `get_item` to use `async_item_service` (DONE)
+- Change: `get_latest_item` to use `async_item_service` (DONE)
+- Change: `list_items` to use `async_item_service` (DONE)
+- Change: `search_items` to use `async_item_service` (DONE)
 
 **Reason:** Remove duplication with REST API and CLI modes
 **Implementation:**
 - Replace current implementation with calls to core services
 - Keep only MCP protocol-specific logic
-- Use synchronous services directly (MCP is typically local/short-lived)
+- Use `async_item_service` wrappers for database operations
 - Standardize response format to match API/CLI
 
 ## 9. Create Unified Error Handling (DONE)