fix: add missing auth hooks for gacha and dimentorin builds

Added missing React Query hooks that were being imported but not exported:
- usePostLogin
- usePostRegister
- usePostVerifyEmail
- usePostSendOtp
- useGoogleCallback

These hooks wrap the existing auth API functions with React Query's useMutation.

Fixes build errors:
- gacha:build - "usePostVerifyEmail" is not exported
- dimentorin:build - "useGoogleCallback" is not exported

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

libs/service/src/hooks/auth/index.ts

@@ -1,7 +1,41 @@
 import { supabase } from '../../supabase';
+import { useMutation } from '@tanstack/react-query';
+import * as authApi from '../../api/auth';
 
 export * from './use-auth-store';
 
+// React Query hooks for auth API
+export const usePostLogin = () => {
+  return useMutation({
+    mutationFn: authApi.postLogin,
+  });
+};
+
+export const usePostRegister = () => {
+  return useMutation({
+    mutationFn: authApi.postRegister,
+  });
+};
+
+export const usePostVerifyEmail = () => {
+  return useMutation({
+    mutationFn: authApi.postVerifyEmail,
+  });
+};
+
+export const usePostSendOtp = () => {
+  return useMutation({
+    mutationFn: authApi.postSendOtp,
+  });
+};
+
+export const useGoogleCallback = () => {
+  return useMutation({
+    mutationFn: ({ code, state }: { code: string; state: string }) =>
+      authApi.postGoogleCallback(code, state),
+  });
+};
+
 // Supabase GitHub OAuth hook
 export const useGitHubAuth = () => {
   const signInWithGitHub = async () => {