feat(ci): 官网 site-v* 构建+部署脚本(compile-site/deploy-site/lib-ssh/workflow)

- scripts/ci/compile-site.sh: node:20 容器内构建 web/website(Astro),
  SITE_URL 注入 canonical 域名 https://pangolin.yanmeiai.com。
- scripts/ci/lib-ssh.sh: 新增共享 setup_ssh/teardown_ssh(写临时私钥+
  known_hosts),供 site 与后续 server 部署复用;目标写死 IP 103.119.13.48
  (runner 无法解析用户本机 ~/.ssh/config 的 pangolin1 别名)。
- scripts/ci/deploy-site.sh: rsync dist/ 到 pangolin1
  /var/www/pangolin-site/,root 部署。
- .gitea/workflows/deploy-site.yml: site-v* tag + workflow_dispatch 触发,
  concurrency 组 deploy-site 防并发。
- .gitea/workflows/ci.yml: shellcheck 列表纳入三个新脚本。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013nMthbVEmQquxBRKb9Fj8u

scripts/ci/lib-ssh.sh

@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+# lib-ssh.sh — shared SSH deploy-key helpers for the pangolin deploy pipelines
+# (site / server). `source` this from deploy-*.sh.
+#
+# Provides:
+#   setup_ssh     -> writes $DEPLOY_SSH_KEY to a temp private key (mode 600),
+#                    registers the deploy host in known_hosts, and exports
+#                    SSH / RSYNC_SSH (ssh command strings) + SSH_KEY_FILE.
+#   teardown_ssh  -> removes the temp private key.
+#
+# Requires env: DEPLOY_SSH_KEY (PEM content of the deploy private key,
+# authorized for root on the target host).
+#
+# Target host is hardcoded to the pangolin1 VPS IP (103.119.13.48): the CI
+# runner has no access to the user's local ~/.ssh/config, so the `pangolin1`
+# alias cannot be resolved there — the bare IP is used instead. Override with
+# DEPLOY_HOST / DEPLOY_PORT if a caller needs to retarget.
+#
+# No command substitution ($()) is used anywhere, per repo bash conventions.
+
+DEPLOY_HOST="${DEPLOY_HOST:-103.119.13.48}"
+DEPLOY_PORT="${DEPLOY_PORT:-22}"
+SSH_KEY_FILE="${SSH_KEY_FILE:-/tmp/pangolin_deploy_key.$$}"
+
+# setup_ssh — write the deploy key, register known_hosts, export SSH/RSYNC_SSH.
+setup_ssh() {
+  if [ -z "${DEPLOY_SSH_KEY:-}" ]; then
+    echo "==> setup_ssh: DEPLOY_SSH_KEY is empty" >&2
+    return 1
+  fi
+
+  mkdir -p ~/.ssh
+  chmod 700 ~/.ssh
+
+  # `printf '%s\n'` 末尾补一个换行：Forgejo/Gitea 存 secret 会去掉结尾换行,
+  # 而缺结尾换行的 OpenSSH 格式私钥会被判为 "invalid format" 拒绝加载,
+  # 退化成无密钥 → Permission denied。多补的换行对已含结尾换行的 PEM 无害。
+  printf '%s\n' "${DEPLOY_SSH_KEY}" > "${SSH_KEY_FILE}"
+  chmod 600 "${SSH_KEY_FILE}"
+
+  ssh-keyscan -p "${DEPLOY_PORT}" -H "${DEPLOY_HOST}" >> ~/.ssh/known_hosts 2>/dev/null
+
+  SSH="ssh -i ${SSH_KEY_FILE} -p ${DEPLOY_PORT} -o StrictHostKeyChecking=no"
+  RSYNC_SSH="ssh -i ${SSH_KEY_FILE} -p ${DEPLOY_PORT} -o StrictHostKeyChecking=no"
+  export SSH RSYNC_SSH SSH_KEY_FILE DEPLOY_HOST DEPLOY_PORT
+  echo "==> setup_ssh: key written to ${SSH_KEY_FILE}, known_hosts updated for ${DEPLOY_HOST}:${DEPLOY_PORT}"
+}
+
+# teardown_ssh — remove the temp private key.
+teardown_ssh() {
+  rm -f "${SSH_KEY_FILE}"
+  echo "==> teardown_ssh: removed ${SSH_KEY_FILE}"
+}