feat: add log rotation configuration for native runners on macOS

manage_runner.sh

@@ -401,6 +401,19 @@ add_native_runner() {
   cp "$tmpfile" "$plist_path"
   rm -f "$tmpfile"
 
+  # Install newsyslog config for log rotation (daily, 5 archives, 50 MB max each).
+  # newsyslog is macOS's built-in log rotator — configs in /etc/newsyslog.d/ are
+  # picked up automatically. Requires sudo for /etc/newsyslog.d/ write access.
+  local newsyslog_conf="/etc/newsyslog.d/com.gitea.runner.${RUNNER_NAME}.conf"
+  if [[ ! -f "$newsyslog_conf" ]]; then
+    tmpfile=$(mktemp)
+    render_template "${SCRIPT_DIR}/templates/com.gitea.runner.newsyslog.conf.tpl" "$tmpfile" \
+      "\${RUNNER_NAME} \${RUNNER_DATA_PATH}"
+    sudo cp "$tmpfile" "$newsyslog_conf"
+    rm -f "$tmpfile"
+    log_success "Log rotation installed: $newsyslog_conf"
+  fi
+
   # Load the launchd service
   launchctl load "$plist_path"
   log_success "Native runner '${RUNNER_NAME}' loaded via launchd"
@@ -443,6 +456,13 @@ remove_native_runner() {
     log_success "Plist removed: $plist_path"
   fi
 
+  # Remove newsyslog rotation config
+  local newsyslog_conf="/etc/newsyslog.d/com.gitea.runner.${RUNNER_NAME}.conf"
+  if [[ -f "$newsyslog_conf" ]]; then
+    sudo rm -f "$newsyslog_conf"
+    log_success "Log rotation config removed: $newsyslog_conf"
+  fi
+
   if [[ -d "${RUNNER_DATA_PATH}" ]]; then
     printf 'Remove runner data at %s? [y/N] ' "${RUNNER_DATA_PATH}"
     read -r confirm