Fix Xcode Cloud UI tests by running TestAction in Debug (#672)

* Set cmux TestAction to Debug for UI tests

* Broaden XCTest detection for debug launch gate

* Fix AutomationSocketUITests launch hang in CI

* Stabilize CI Swift package resolution for test jobs

* Stabilize Xcode Cloud UI test focus and socket handling

* Add Xcode Cloud pre-xcodebuild submodule bootstrap

* Harden Xcode Cloud bonsplit bootstrap fallback

ci_scripts/ci_pre_xcodebuild.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+set -euo pipefail
+
+ROOT="${CI_PRIMARY_REPOSITORY_PATH:-$PWD}"
+cd "$ROOT"
+
+echo "ci_pre_xcodebuild: repository root is $ROOT"
+
+if [ -f "vendor/bonsplit/Package.swift" ]; then
+  echo "ci_pre_xcodebuild: vendor/bonsplit already present"
+  exit 0
+fi
+
+if git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
+  echo "ci_pre_xcodebuild: attempting submodule init for vendor/bonsplit"
+  git submodule sync --recursive || true
+  git submodule update --init --recursive vendor/bonsplit || true
+fi
+
+if [ ! -f "vendor/bonsplit/Package.swift" ]; then
+  echo "ci_pre_xcodebuild: submodule not present, cloning fallback"
+  rm -rf vendor/bonsplit
+  mkdir -p vendor
+  git clone --depth 1 https://github.com/manaflow-ai/bonsplit.git vendor/bonsplit
+
+  if git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
+    expected_sha="$(git ls-tree HEAD vendor/bonsplit | awk '{print $3}')"
+    if [ -n "${expected_sha:-}" ]; then
+      (
+        cd vendor/bonsplit
+        git fetch --depth 1 origin "$expected_sha" || true
+        git checkout "$expected_sha" || true
+      )
+    fi
+  fi
+fi
+
+if [ ! -f "vendor/bonsplit/Package.swift" ]; then
+  echo "ci_pre_xcodebuild: missing vendor/bonsplit/Package.swift after recovery" >&2
+  exit 1
+fi
+
+echo "ci_pre_xcodebuild: vendor/bonsplit is ready"