feat: scaffold native fnOS application stage 1

havline/cmd/install_callback

@@ -0,0 +1,22 @@
+#!/bin/bash
+set -euo pipefail
+
+mkdir -p "$TRIM_PKGVAR/logs"
+chown -R "$TRIM_USERNAME:$TRIM_GROUPNAME" "$TRIM_PKGVAR"
+
+ARCH="$(uname -m)"
+case "$ARCH" in
+  x86_64|amd64) ARCH_DIR="amd64" ;;
+  aarch64|arm64) ARCH_DIR="arm64" ;;
+  *) echo "不支持的设备架构：$ARCH" > "$TRIM_TEMP_LOGFILE"; exit 1 ;;
+esac
+
+BIN="$TRIM_APPDEST/server/$ARCH_DIR/havline"
+if [ ! -f "$BIN" ]; then
+  echo "找不到原生二进制：$BIN" > "$TRIM_TEMP_LOGFILE"
+  exit 1
+fi
+
+chmod +x "$BIN"
+echo "Havline 数据目录已准备：$TRIM_PKGVAR"
+exit 0