604e38cf07
- CLAUDE.md: 紅區治理章節 - Skills 01/03: 版本更新 - ADR/Architecture: 標準化 Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
323 lines
8.1 KiB
Markdown
323 lines
8.1 KiB
Markdown
# ADR-001: 前端狀態管理採用 Zustand
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> **狀態**: Accepted
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> **日期**: 2026-03-20 (Gate 0 驗證完成)
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> **決策者**: 統帥 (CTO + CPO)
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> **關聯**: [docs/adr/ADR-004-state-management.md](../docs/adr/ADR-004-state-management.md)
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---
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## 摘要
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AWOOOI 前端全面採用 **Zustand** 作為狀態管理工具，特別針對：
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- **Approval Multi-Sig 狀態機** - HITL 審批流程
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- **SSE 即時串流** - Dashboard 主機監控
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---
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## 背景
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### 問題陳述
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AWOOOI 需要處理高頻率的狀態更新：
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| 場景 | 更新頻率 | 狀態類型 |
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|------|---------|---------|
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| Dashboard SSE | 每秒 | 4 主機 CPU/Memory |
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| Approval 簽核 | 事件驅動 | Multi-Sig 狀態機 |
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| OpenClaw 思考 | 串流 | AI 輸出 Token |
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傳統的 Redux 在這種場景下過於笨重 (7KB + 大量 boilerplate)。
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---
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## 決策
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**採用 Zustand 作為唯一全域狀態管理工具**
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### 核心實作
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#### 1. Dashboard Store (SSE 整合)
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```typescript
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// stores/dashboard.store.ts
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import { create } from 'zustand'
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interface DashboardState {
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hosts: HostStatus[]
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connectionStatus: 'connecting' | 'connected' | 'disconnected' | 'error'
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lastUpdate: Date | null
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// Actions
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connect: (apiUrl: string) => void
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disconnect: () => void
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updateHosts: (hosts: HostStatus[]) => void
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}
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export const useDashboardStore = create<DashboardState>((set, get) => ({
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hosts: [],
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connectionStatus: 'disconnected',
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lastUpdate: null,
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connect: (apiUrl) => {
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set({ connectionStatus: 'connecting' })
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const eventSource = new EventSource(`${apiUrl}/api/v1/dashboard/stream`)
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eventSource.onopen = () => {
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set({ connectionStatus: 'connected' })
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}
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eventSource.onmessage = (event) => {
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const data = JSON.parse(event.data)
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set({
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hosts: data.hosts,
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lastUpdate: new Date()
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})
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}
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eventSource.onerror = () => {
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set({ connectionStatus: 'error' })
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}
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},
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disconnect: () => {
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set({ connectionStatus: 'disconnected' })
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},
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updateHosts: (hosts) => set({ hosts, lastUpdate: new Date() })
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}))
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// Selector hooks for fine-grained subscriptions
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export const useHosts = () => useDashboardStore((s) => s.hosts)
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export const useConnectionStatus = () => useDashboardStore((s) => s.connectionStatus)
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```
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#### 2. Approval Store (Multi-Sig 狀態機)
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```typescript
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// stores/approval.store.ts
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import { create } from 'zustand'
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type SigningStatus = 'idle' | 'signing' | 'success' | 'error'
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interface ApprovalState {
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pendingApprovals: Approval[]
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selectedApproval: Approval | null
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signingStatus: SigningStatus
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// Actions
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fetchApprovals: () => Promise<void>
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signApproval: (id: string, userId: string, role: string) => Promise<void>
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rejectApproval: (id: string, reason: string) => Promise<void>
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}
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export const useApprovalStore = create<ApprovalState>((set, get) => ({
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pendingApprovals: [],
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selectedApproval: null,
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signingStatus: 'idle',
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fetchApprovals: async () => {
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const response = await fetch('/api/v1/approvals?status=pending')
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const data = await response.json()
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set({ pendingApprovals: data.items })
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},
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signApproval: async (id, userId, role) => {
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set({ signingStatus: 'signing' })
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try {
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const response = await fetch(`/api/v1/approvals/${id}/approve`, {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify({ user_id: userId, user_role: role })
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})
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if (response.status === 409) {
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// TOCTOU Conflict or Duplicate Signature
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throw new Error('Conflict')
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}
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const result = await response.json()
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// Update local state
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if (!result.needs_more) {
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// Remove from pending if fully approved
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set((s) => ({
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pendingApprovals: s.pendingApprovals.filter(a => a.id !== id),
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signingStatus: 'success'
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}))
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} else {
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set({ signingStatus: 'success' })
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}
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} catch (error) {
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set({ signingStatus: 'error' })
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throw error
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}
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},
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rejectApproval: async (id, reason) => {
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await fetch(`/api/v1/approvals/${id}/reject`, {
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method: 'POST',
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headers: { 'Content-Type': 'application/json' },
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body: JSON.stringify({ reason })
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})
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set((s) => ({
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pendingApprovals: s.pendingApprovals.filter(a => a.id !== id)
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}))
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}
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}))
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```
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---
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## 狀態機設計
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### Approval 生命週期
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```
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┌─────────────────────┐
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│ pending │
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└──────────┬──────────┘
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│
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┌───────────────────┼───────────────────┐
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│ │ │
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▼ ▼ ▼
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┌──────────────┐ ┌──────────────┐ ┌──────────────┐
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│ approved │ │ rejected │ │ voided │
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│ (簽章達閾值) │ │ (使用者拒絕) │ │ (TOCTOU衝突) │
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└──────────────┘ └──────────────┘ └──────────────┘
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```
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### 風險矩陣 (簽章閾值)
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| Risk Level | 簽章數 | 條件 |
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|------------|--------|------|
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| low | 0 | 自動執行 |
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| medium | 1 | admin/devops |
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| high | 2 | 任二管理員 |
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| critical | 2 | 含 CTO 或 CISO |
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---
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## 理由
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### 為什麼選擇 Zustand
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| 特性 | Redux | Zustand | 優勢 |
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|------|-------|---------|------|
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| Bundle Size | ~7KB | ~1KB | **-86%** |
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| Boilerplate | 高 | 極低 | 開發效率 |
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| SSE 整合 | 需 middleware | 原生 | 簡單直接 |
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| TypeScript | 需額外設定 | 開箱即用 | DX 優異 |
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| Re-render | 需 selector | 內建 | 效能優化 |
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### 為什麼不選擇 Redux
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1. **過度工程** - AWOOOI 不需要 Redux 的 time-travel debugging
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2. **Boilerplate** - 每個 action 需要 type/reducer/action creator
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3. **Bundle** - 7KB 對於輕量 SaaS 是負擔
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4. **SSE 整合** - 需要額外的 middleware 如 redux-saga
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### 為什麼不選擇 Context API
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1. **Re-render 問題** - Provider 下所有元件都會重繪
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2. **不適合高頻更新** - SSE 每秒更新會造成效能問題
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3. **缺乏 selector** - 無法細粒度訂閱
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---
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## SSE 企業級模式
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### Buffer + Debounce
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```typescript
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// 避免每個 SSE 事件都觸發 re-render
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const bufferRef = useRef<HostStatus[]>([])
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eventSource.onmessage = (event) => {
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bufferRef.current.push(JSON.parse(event.data))
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}
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// 每 500ms 批次更新
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setInterval(() => {
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if (bufferRef.current.length > 0) {
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set({ hosts: bufferRef.current })
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bufferRef.current = []
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}
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}, 500)
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```
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### AbortController 清理
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```typescript
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useEffect(() => {
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const controller = new AbortController()
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connect(apiUrl)
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return () => {
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controller.abort()
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disconnect()
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}
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}, [])
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```
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### 指數退避重連
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```typescript
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const reconnect = (attempt: number) => {
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const delay = Math.min(1000 * Math.pow(2, attempt), 30000)
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setTimeout(() => connect(), delay)
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}
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```
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---
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## 驗證結果 (Gate 0)
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| 測試項目 | 結果 |
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| Dashboard SSE 連線 | ✅ 穩定 |
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| 4 主機即時更新 | ✅ <100ms 延遲 |
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| Approval 簽核流程 | ✅ Multi-Sig 運作 |
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| TOCTOU 防護 | ✅ 409 正確處理 |
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| 記憶體洩漏 | ✅ 無 (AbortController) |
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---
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## 後果
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### 優點
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- **極度輕量** - 不增加 bundle 負擔
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- **高頻更新** - 完美處理 SSE 串流
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- **簡單 API** - 降低學習曲線
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- **TypeScript** - 完整型別推導
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### 缺點
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- **生態較小** - 相比 Redux 社群資源較少
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- **DevTools** - 功能不如 Redux DevTools 強大
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### 風險緩解
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| 風險 | 緩解措施 |
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|------|---------|
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| Store 肥大化 | 強制 Slice Pattern |
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| 狀態同步錯誤 | 搭配 TanStack Query |
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---
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## 參考資料
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- [Zustand 官方文檔](https://zustand-demo.pmnd.rs/)
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- [API 契約](../docs/api/approvals-contract.yaml)
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- [docs/adr/ADR-004](../docs/adr/ADR-004-state-management.md) - 詳細版本
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---
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*Gate 0 里程碑 - 2026-03-20*
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