feat(auth): add Google logo SVG to 'Masuk dengan Google' button

Inline SVG with official Google brand colors (blue, green, yellow, red)
placed before the label text with gap-2.5 spacing.

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

apps/web/src/components/auth-form.tsx

@@ -75,8 +75,17 @@ export function AuthForm({ mode, isSubmitting, error, googleOAuthEnabled, onSubm
           </Button>
         </form>
         {googleOAuthEnabled && (
-          <Button className="mt-3 w-full" variant="outline" asChild>
+          <Button className="mt-3 w-full flex items-center justify-center gap-2.5" variant="outline" asChild>
-            <a href="/api/v1/auth/google">Masuk dengan Google</a>
+            <a href="/api/v1/auth/google">
+              <svg viewBox="0 0 24 24" className="h-5 w-5" aria-hidden="true">
+                <path fill="#4285F4" d="M22.56 12.25c0-.78-.07-1.53-.2-2.25H12v4.26h5.92a5.06 5.06 0 0 1-2.2 3.32v2.77h3.57c2.08-1.92 3.28-4.74 3.28-8.1z" />
+                <path fill="#34A853" d="M12 23c2.97 0 5.46-.98 7.28-2.66l-3.57-2.77c-.98.66-2.23 1.06-3.71 1.06-2.86 0-5.29-1.93-6.16-4.53H2.18v2.84C3.99 20.53 7.7 23 12 23z" />
+                <path fill="#FBBC05" d="M5.84 14.09c-.22-.66-.35-1.36-.35-2.09s.13-1.43.35-2.09V7.07H2.18C1.43 8.55 1 10.22 1 12s.43 3.45 1.18 4.93l2.85-2.22.81-.62z" />
+                <path fill="#EA4335" d="M12 5.38c1.62 0 3.06.56 4.21 1.64l3.15-3.15C17.45 2.09 14.97 1 12 1 7.7 1 3.99 3.47 2.18 7.07l3.66 2.84c.87-2.6 3.3-4.53 6.16-4.53z" />
+                <path fill="none" d="M1 1h22v22H1z" />
+              </svg>
+              Masuk dengan Google
+            </a>
           </Button>
         )}
       </CardContent>