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/RouteError.tsx

@@ -4,7 +4,7 @@ import { DetailsBanner } from "./core/DetailsBanner";
 export default function RouteError({ error }: { error: unknown }) {
   console.log("Error", error);
   const stringified = JSON.stringify(error);
-  // biome-ignore lint/suspicious/noExplicitAny: none
+  // oxlint-disable-next-line no-explicit-any -- none
   const message = (error as any).message ?? stringified;
   const stack =
     typeof error === "object" && error != null && "stack" in error ? String(error.stack) : null;