构建: 多架构 Dockerfile + 构建脚本

- Dockerfile 三阶段：前端固定在 BUILDPLATFORM 编译一次（平台无关产物），
  Go 后端按 TARGETARCH 交叉编译，两种架构共用同一份 web/dist
- 前端用 pnpm --ignore-scripts（pnpm≥10 拦截 esbuild/vue-demi postinstall，
  esbuild 走 optionalDependencies 自带二进制），运行镜像非 root + /app/data 卷
- scripts/build-image.sh：--local 本地单架构加载；默认多架构 amd64+arm64 推送

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

scripts/build-image.sh

@@ -0,0 +1,69 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+DOCKER_USER="${DOCKER_USER:-openteam}"
+VERSION="${VERSION:-$(git describe --tags --always 2>/dev/null || echo latest)}"
+PLATFORMS="linux/amd64,linux/arm64"
+
+# --local：本地构建不推送（单架构，加载到本地 docker，tag 不带仓库前缀）
+if [[ "${1:-}" == "--local" ]]; then
+  LOCAL=1
+else
+  LOCAL=0
+fi
+if [[ $# -gt 1 || ( $# -eq 1 && "$1" != "--local" ) ]]; then
+  echo "用法: $0 [--local]" >&2
+  exit 1
+fi
+
+native_arch() {
+  case "$(uname -m)" in
+    x86_64|amd64) echo "linux/amd64" ;;
+    aarch64|arm64) echo "linux/arm64" ;;
+    *) echo "linux/$(uname -m)" ;;
+  esac
+}
+
+if ! docker buildx version &>/dev/null; then
+  echo "❌ docker buildx 不可用"
+  exit 1
+fi
+
+if ! docker buildx inspect multiarch &>/dev/null 2>&1; then
+  echo "🔧 创建 multiarch builder..."
+  docker buildx create --name multiarch --driver docker-container --use
+else
+  docker buildx use multiarch
+fi
+docker buildx inspect --bootstrap
+
+if [[ $LOCAL -eq 1 ]]; then
+  PLATFORM="$(native_arch)"
+  echo ""
+  echo "========================================"
+  echo "🚀 本地构建 openteam  (${PLATFORM})"
+  echo "   tag: openteam:${VERSION}"
+  echo "========================================"
+  docker buildx build \
+    --platform "${PLATFORM}" \
+    -t "openteam:${VERSION}" \
+    -t "openteam:latest" \
+    --load \
+    .
+  echo ""
+  echo "✅ 完成！openteam:${VERSION}（已加载到本地 docker）"
+else
+  echo ""
+  echo "========================================"
+  echo "🚀 构建 openteam  (${PLATFORMS})"
+  echo "   tag: ${DOCKER_USER}/openteam:${VERSION}"
+  echo "========================================"
+  docker buildx build \
+    --platform "${PLATFORMS}" \
+    -t "${DOCKER_USER}/openteam:${VERSION}" \
+    -t "${DOCKER_USER}/openteam:latest" \
+    --push \
+    .
+  echo ""
+  echo "✅ 完成！${DOCKER_USER}/openteam:${VERSION}"
+fi