fix(lib): use runtime_handle_clone for FFI context handling in spawn_blocking on Windows

Author: Gioee

src/lib.rs

@@ -790,8 +790,9 @@ pub extern "C" fn mcp_list_tools_init() -> usize {
             let runtime_handle = client.runtime.handle().clone();
 
             // Use spawn_blocking which handles FFI context better on Windows
+            let runtime_handle_clone = runtime_handle.clone();
             runtime_handle.spawn_blocking(move || {
-                runtime_handle.block_on(async move {
+                runtime_handle_clone.block_on(async move {
                     let service_guard = service_arc.lock().await;
                     if let Some(service) = service_guard.as_ref() {
                         match service.list_tools(None).await {
@@ -877,8 +878,9 @@ pub extern "C" fn mcp_call_tool_init(tool_name: *const c_char, arguments: *const
             let runtime_handle = client.runtime.handle().clone();
 
             // Use spawn_blocking which handles FFI context better on Windows
+            let runtime_handle_clone = runtime_handle.clone();
             runtime_handle.spawn_blocking(move || {
-                runtime_handle.block_on(async move {
+                runtime_handle_clone.block_on(async move {
                     let service_guard = service_arc.lock().await;
                     if let Some(service) = service_guard.as_ref() {
                         // Parse arguments