feat: 融合 devflow-claude P0 批机制 (REQ-20260416-0017)

P0-1: SessionStart Hook — hooks/session-context.sh
  从分支名解析 REQ-ID，调 MCP API 查询需求详情注入 system-reminder

P0-2: PreToolUse Hook — hooks/pre-tool-confirm.sh
  拦截生产推送、force push、docker prod 容器操作、git reset --hard 等

P0-3: Release Draft 闸门设计文档 — docs/design/release-draft-gate.md
  完整架构 + 渐进式落地路径（拆 7 个子任务延后）
  附最小可用脚本 hooks/release-draft.sh 创建 Gitea draft release

P0-4: Memory 隔离规则 — 写入 req-prd / req-design / req-workflow
  禁止 auto-memory 污染模板产出物（章节结构、字段定义、文档结构）

P0-5: CLAUDE.md 架构检查 + 架构片段库
  dev-coding skill 执行前检查架构关键词
  新增 templates/claude-md-snippets/ 含 Go+Gin / React+AntD / Vue+Element /
  MCP+TS / generic 五套骨架

P0-6: /commit 分支保护自动化 — 新 skill dev-commit-plugin
  保护分支自动建功能分支 + Conventional Commits + REQ-XXX 自动关联

安装:
  bash hooks/install.sh

后续:
  P0-3 完整实现拆 7 个子任务（P0-3.1 ~ P0-3.7）
  建议先部署 hooks 跑 1-2 周观察，再推进 Release 机制落地

hooks/install.sh

@@ -0,0 +1,81 @@
+#!/bin/bash
+# install.sh
+# 一键把 ai-proj-helper hooks 注册到 ~/.claude/settings.json
+#
+# 用法: bash hooks/install.sh
+
+set -e
+
+HOOKS_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+SETTINGS_FILE="$HOME/.claude/settings.json"
+
+if ! command -v python3 >/dev/null 2>&1; then
+    echo "❌ 需要 python3（用于合并 JSON）"
+    exit 1
+fi
+
+if ! command -v jq >/dev/null 2>&1; then
+    echo "⚠️  未安装 jq，PreToolUse hook 将无法正常工作"
+    echo "   请执行: brew install jq"
+fi
+
+mkdir -p "$HOME/.claude"
+
+python3 << EOF
+import json
+import os
+
+settings_file = "$SETTINGS_FILE"
+hooks_dir = "$HOOKS_DIR"
+
+# 读已有配置
+if os.path.exists(settings_file):
+    with open(settings_file) as f:
+        data = json.load(f)
+else:
+    data = {}
+
+# 合并 hooks
+hooks = data.setdefault("hooks", {})
+
+# SessionStart
+session_start = hooks.setdefault("SessionStart", [])
+session_cmd = f"{hooks_dir}/session-context.sh"
+already_registered = any(
+    any(h.get("command") == session_cmd for h in entry.get("hooks", []))
+    for entry in session_start
+)
+if not already_registered:
+    session_start.append({
+        "hooks": [{"type": "command", "command": session_cmd, "timeout": 10}]
+    })
+    print("✅ 注册 SessionStart hook")
+else:
+    print("⏭️  SessionStart hook 已存在")
+
+# PreToolUse (Bash)
+pre_tool = hooks.setdefault("PreToolUse", [])
+pre_cmd = f"{hooks_dir}/pre-tool-confirm.sh"
+already_registered = any(
+    entry.get("matcher") == "Bash" and any(h.get("command") == pre_cmd for h in entry.get("hooks", []))
+    for entry in pre_tool
+)
+if not already_registered:
+    pre_tool.append({
+        "matcher": "Bash",
+        "hooks": [{"type": "command", "command": pre_cmd, "timeout": 30}]
+    })
+    print("✅ 注册 PreToolUse (Bash) hook")
+else:
+    print("⏭️  PreToolUse hook 已存在")
+
+# 写回
+with open(settings_file, "w") as f:
+    json.dump(data, f, indent=2, ensure_ascii=False)
+
+print(f"\n📝 已更新: {settings_file}")
+print("\n下一步：")
+print("  1. 重启 Claude Code 会话")
+print("  2. 切到含 REQ-ID 的分支测试 SessionStart hook")
+print("  3. 让 AI 尝试 'git push origin main' 测试 PreToolUse hook")
+EOF