feat(grokbuild): add first-class Grok Build support (#5453)

* feat(grokbuild): add backend integration

* feat(grokbuild): add provider and management UI

* test(grokbuild): cover configuration and integrations

* fix(grokbuild): address backend review feedback

* fix(grokbuild): complete UI review feedback

* feat(grokbuild): add CLI lifecycle management

* fix(grokbuild): align provider icon fallback

* test(grokbuild): cover provider icon persistence

src/lib/query/failover.ts

@@ -227,7 +227,9 @@ export function useSetAutoFailoverEnabled() {
           ? "Claude"
           : variables.appType === "codex"
             ? "Codex"
-            : "Gemini";
+            : variables.appType === "grokbuild"
+              ? "Grok Build"
+              : "Gemini";
 
       toast.success(
         variables.enabled