chore: 新增 P2 稳定化执行合同快照及根目录门禁脚本

- B1~B4 全部 DONE，旧快照不变
- check-minimal.sh 本地最小门禁入口

scripts/check-minimal.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+
+echo "=== [1/3] Server Prisma Validate ==="
+(
+  cd "$ROOT_DIR/server"
+  npm run prisma:validate
+)
+
+echo ""
+echo "=== [2/3] Server Static Checks ==="
+(
+  cd "$ROOT_DIR/server"
+  node --check src/routes/reimbursements.js
+  node --check src/routes/workflow.js
+  node --check src/routes/delegations.js
+  node --check src/jobs/delegationRevokeJob.js
+  bash -n scripts/regression-workflow-actions.sh
+  bash -n scripts/regression-all.sh
+)
+
+echo ""
+echo "=== [3/3] Client Typecheck + Build ==="
+(
+  cd "$ROOT_DIR/client"
+  npm run typecheck
+  npm run build
+)
+
+echo ""
+echo "[OK] Minimal checks passed"