feat(deploy): 拉取后自动合并 server/.env.example 缺失键，服务器只跑 pull-and-restart

Made-with: Cursor

scripts/merge-server-env-from-example.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+# 将 server/.env.example 中「server/.env 尚未出现的 KEY=」追加到 .env，不覆盖已有配置。
+# 供 pull-and-restart / restart 调用，实现服务器零手动改 .env。
+set +e
+ROOT="${1:-}"
+if [ -z "$ROOT" ]; then
+  ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+fi
+ENVF="$ROOT/server/.env"
+EX="$ROOT/server/.env.example"
+[ -f "$EX" ] || exit 0
+[ -f "$ENVF" ] || exit 0
+
+while IFS= read -r raw || [ -n "$raw" ]; do
+  line="${raw#"${raw%%[![:space:]]*}"}"
+  line="${line%"${line##*[![:space:]]}"}"
+  case "$line" in
+    \#*|'') continue ;;
+  esac
+  case "$line" in
+    [A-Za-z_][A-Za-z0-9_]*=*)
+      key="${line%%=*}"
+      if ! grep -qE "^[[:space:]]*${key}=" "$ENVF" 2>/dev/null; then
+        printf '\n# auto from .env.example (%s)\n%s\n' "$(date +%Y-%m-%d)" "$line" >> "$ENVF"
+        echo "merge-server-env: 已追加 $key -> server/.env" >&2
+      fi
+      ;;
+  esac
+done < "$EX"
+exit 0