Align lint fixes with main and resolve merge conflicts

- Convert biome-ignore to oxlint-disable-next-line across client app
- Fix no-base-to-string with type narrowing instead of suppressions
- Fix no-floating-promises with fireAndForget() in proxy app
- Fix restrict-template-expressions with String() wrapping
- Resolve leftover merge conflict markers in manager.rs
- Remove duplicate cmd_plugin_init_errors from lib.rs
- Add graphql as explicit dependency in yaak-client

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/yaak-client/components/FolderLayout.tsx

@@ -42,7 +42,7 @@ export function FolderLayout({ folder, style }: Props) {
   }, [folder.id, folders, requests]);
 
   const handleSendAll = useCallback(() => {
-    sendAllAction?.call(folder);
+    void sendAllAction?.call(folder);
   }, [sendAllAction, folder]);
 
   return (