chore: 参考 novavis 优化 Agent 配置体系

新增 AGENTS.md 规则（§1-§22）、Hook 脚本和可复用工具脚本：

- 重构 AGENTS.md：新增 16 条规则（任务分解、双轨验证、骨架占位禁止、
  测试命令退出码保留、工具脚本可复用、完成前验证门禁、Flaky 测试门禁等）
- 新增 .trae/hooks/：session-start / pre-agent-check / check-completeness / stop-check
- 新增 .trae/settings.json：关联 4 个 Hook 到 SessionStart/PreToolUse/PostToolUse/Stop
- 新增 scripts/：flaky-scan.sh / check-task-checklist.sh / check-issue-checklist.sh
- 调整 .gitignore：保留 hooks/settings 纳入版本控制，忽略运行时状态文件

scripts/flaky-scan.sh

@@ -0,0 +1,118 @@
+#!/usr/bin/env bash
+# Flaky test scanner — 连续运行测试检测不稳定测试
+# 用法:
+#   bash scripts/flaky-scan.sh               # 随机顺序运行 3 次全量测试
+#   bash scripts/flaky-scan.sh --runs 5      # 指定运行次数
+#   bash scripts/flaky-scan.sh --spec <文件>  # 指定测试文件
+#   bash scripts/flaky-scan.sh --help        # 显示帮助
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+PROJECT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
+APP_DIR="${PROJECT_DIR}/everything-is-suitable-uniapp"
+
+RUNS=3
+SPEC=""
+VERBOSE=0
+
+# 颜色
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+NC='\033[0m' # No Color
+
+usage() {
+  echo "Usage: $0 [options]"
+  echo ""
+  echo "Options:"
+  echo "  --runs <N>      运行次数 (default: 3)"
+  echo "  --spec <file>   指定测试文件"
+  echo "  --verbose       详细输出"
+  echo "  --help          显示此帮助"
+  exit 0
+}
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --runs) RUNS="$2"; shift 2 ;;
+    --spec) SPEC="$2"; shift 2 ;;
+    --verbose) VERBOSE=1; shift ;;
+    --help) usage ;;
+    *) echo "Unknown option: $1"; usage ;;
+  esac
+done
+
+if [ ! -d "$APP_DIR" ]; then
+  echo "错误: 未找到应用目录 ${APP_DIR}"
+  exit 1
+fi
+
+cd "$APP_DIR"
+
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+echo "  Flaky Test Scanner"
+echo "  运行次数: ${RUNS}"
+echo "  测试文件: ${SPEC:-全部}"
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+
+PASS_COUNT=0
+FAIL_COUNT=0
+declare -a FAILED_RUNS
+
+for i in $(seq 1 "$RUNS"); do
+  echo ""
+  echo "  [${i}/${RUNS}] 运行中..."
+
+  if [ -n "$SPEC" ]; then
+    CMD="npx vitest run --reporter=verbose \"$SPEC\""
+  else
+    CMD="npx vitest run --reporter=verbose"
+  fi
+
+  if [ "$VERBOSE" -eq 1 ]; then
+    echo "  → $CMD"
+  fi
+
+  set +e
+  OUTPUT=$(eval "$CMD" 2>&1)
+  EXIT_CODE=$?
+  set -e
+
+  if [ "$EXIT_CODE" -eq 0 ]; then
+    echo -e "  [${i}/${RUNS}] ${GREEN}PASS${NC}"
+    PASS_COUNT=$((PASS_COUNT + 1))
+  else
+    echo -e "  [${i}/${RUNS}] ${RED}FAIL${NC} (exit code: ${EXIT_CODE})"
+    FAIL_COUNT=$((FAIL_COUNT + 1))
+    FAILED_RUNS+=("$i")
+    if [ "$VERBOSE" -eq 1 ]; then
+      echo "  --- 失败输出 ---"
+      echo "$OUTPUT" | tail -50
+      echo "  ---"
+    fi
+  fi
+done
+
+echo ""
+echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
+echo "  结果汇总"
+echo "  PASS: ${PASS_COUNT}/${RUNS}"
+echo "  FAIL: ${FAIL_COUNT}/${RUNS}"
+
+if [ "$FAIL_COUNT" -eq 0 ]; then
+  echo -e "  ${GREEN}结论: 未检测到 flaky 测试，测试稳定 ✓${NC}"
+  exit 0
+else
+  echo -e "  ${RED}结论: 检测到 flaky 测试${NC}"
+  echo "  失败运行: ${FAILED_RUNS[*]}"
+  echo ""
+  echo "  常见 flaky 根因:"
+  echo "  ① vi.clearAllMocks() 不清除 mockResolvedValue 实现"
+  echo "  ② 模块级可变 let mock 变量被测试修改未还原"
+  echo "  ③ vi.stubGlobal 全局替换未在 afterEach 恢复"
+  echo "  ④ waitFor 未 import"
+  echo ""
+  echo "  建议: 对失败运行使用 --verbose 查看详细输出"
+  exit 1
+fi