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-proxy/lib/hotkeys.ts

@@ -38,6 +38,7 @@ export async function initHotkeys(): Promise<() => void> {
 
   const bindings: ActionBinding[] = actions
     .filter(
+      // oxlint-disable-next-line no-redundant-type-constituents -- ActionMetadata resolves at runtime
       (entry): entry is [ActionInvocation, ActionMetadata & { defaultHotkey: string }] =>
         entry[1].defaultHotkey != null,
     )
@@ -51,7 +52,7 @@ export async function initHotkeys(): Promise<() => void> {
     for (const binding of bindings) {
       if (matchesEvent(binding.keys, e)) {
         e.preventDefault();
-        rpc("execute_action", binding.invocation);
+        void rpc("execute_action", binding.invocation);
         return;
       }
     }