refactor: apply zero-unwrap policy and optimize locks in store.rs and handlers

server/src/router.rs

@@ -0,0 +1,16 @@
+use crate::state::MemoryState;
+use async_trait::async_trait;
+use serde_json::Value;
+use std::sync::Arc;
+
+#[async_trait]
+pub trait McpTool: Send + Sync {
+    /// The unique name of the tool
+    fn name(&self) -> &'static str;
+
+    /// The JSON schema for the tool
+    fn schema(&self) -> Value;
+
+    /// Execute the tool with the given arguments
+    async fn execute(&self, args: Value, state: Arc<MemoryState>) -> Result<String, String>;
+}