fix: fix build bug mac

.gitea/workflows/desktop-client-build.yml

@@ -18,9 +18,9 @@ on:
         required: true
         default: "mac,win"
       mac_arches:
-        description: "macOS architectures: universal, arm64, x64, or comma-separated"
+        description: "macOS architectures: arm64, x64, or comma-separated. universal requires a macOS runner."
         required: true
-        default: "universal"
+        default: "arm64"
       win_arches:
         description: "Windows architectures: x64, arm64, ia32, or comma-separated"
         required: true
@@ -79,7 +79,7 @@ concurrency:
 
 env:
   DEFAULT_DESKTOP_PLATFORMS: "mac,win"
-  DEFAULT_MAC_ARCHES: "universal"
+  DEFAULT_MAC_ARCHES: "arm64"
   DEFAULT_WIN_ARCHES: "x64"
   DEFAULT_VERSION_PREFIX: "0.1"
   DEFAULT_NAS_OUTPUT_DIR: "/vol1/1000/share/gl-test"
@@ -190,7 +190,15 @@ jobs:
             exit 1
           fi
 
-          mac_arch_flags="$(arch_flags "${REQUESTED_MAC_ARCHES:-${DEFAULT_MAC_ARCHES}}" "x64 arm64 universal")"
+          mac_arches="$(normalize_csv "${REQUESTED_MAC_ARCHES:-${DEFAULT_MAC_ARCHES}}")"
+          case ",${mac_arches}," in
+            *,universal,*)
+              echo "::error::mac universal cannot be built on the current ubuntu-latest runner. Use mac_arches=arm64 or x64, or run this job on a macOS runner."
+              exit 1
+              ;;
+          esac
+
+          mac_arch_flags="$(arch_flags "${mac_arches}" "x64 arm64")"
           win_arch_flags="$(arch_flags "${REQUESTED_WIN_ARCHES:-${DEFAULT_WIN_ARCHES}}" "x64 arm64 ia32")"
 
           version_prefix="${REQUESTED_VERSION_PREFIX:-${DEFAULT_VERSION_PREFIX}}"