feat(workflow): add workflow engine, /workflows panel, /ultracode skill

将 feat/sdk-backend 分支中 workflow 相关的 20 个 commit 压缩为单 commit：

- 工作流引擎核心：phase / agent / parallel / pipeline 编排原语（packages/workflow-engine/）
- /workflows 面板：三区焦点布局（顶部 run tabs + 左侧 phase 侧栏 + 右侧 agent 列表）
- /ultracode skill：多 agent workflow 编排入口
- 进度存储 / journal / notification 系统
- WorkflowService 生命周期管理 + SentryErrorBoundary
- 脚本沙箱：禁用 dynamic import()、JSON args 防御性归一化
- journal 与 named-workflow 路径统一在 projectRoot
- 错误处理：parallel/pipeline hooks 错误日志、failure routing、semaphore abort
- workflow 工具升级为 core 工具 + PascalCase 命名

Co-Authored-By: glm-5.1 <zai-org@claude-code-best.win>

src/workflow/__tests__/status.test.ts

@@ -0,0 +1,75 @@
+import { expect, test } from 'bun:test'
+import type { AgentProgress, RunProgress } from '../progress/store.js'
+import {
+  STATUS_DOT,
+  RUN_STATUS_COLOR,
+  PHASE_MARK,
+  PHASE_COLOR,
+  agentVisual,
+} from '../panel/status.js'
+
+test('STATUS_DOT / RUN_STATUS_COLOR 覆盖四种 run 状态且为非空字符', () => {
+  const statuses: RunProgress['status'][] = [
+    'running',
+    'completed',
+    'failed',
+    'killed',
+  ]
+  for (const s of statuses) {
+    expect(STATUS_DOT[s].length).toBeGreaterThan(0)
+    expect(RUN_STATUS_COLOR[s]).toBeTruthy()
+  }
+  expect(STATUS_DOT.running).toBe('●')
+  expect(STATUS_DOT.completed).toBe('✓')
+  expect(STATUS_DOT.failed).toBe('✗')
+  expect(STATUS_DOT.killed).toBe('■')
+})
+
+test('PHASE_MARK / PHASE_COLOR 覆盖 running/done/pending', () => {
+  expect(PHASE_MARK.running).toBe('●')
+  expect(PHASE_MARK.done).toBe('✓')
+  expect(PHASE_MARK.pending).toBe('○')
+  expect(PHASE_COLOR.pending).toBe('subtle')
+})
+
+test('agentVisual：running → ● warning running', () => {
+  const a: AgentProgress = { id: 1, status: 'running' }
+  expect(agentVisual(a)).toEqual({
+    mark: '●',
+    color: 'warning',
+    suffix: 'running',
+  })
+})
+
+test('agentVisual：done·object → ✓ success object', () => {
+  const a: AgentProgress = {
+    id: 1,
+    status: 'done',
+    resultKind: 'ok',
+    outputShape: 'object',
+  }
+  expect(agentVisual(a)).toEqual({
+    mark: '✓',
+    color: 'success',
+    suffix: 'object',
+  })
+})
+
+test('agentVisual：done·text → ✓ success text', () => {
+  const a: AgentProgress = {
+    id: 1,
+    status: 'done',
+    resultKind: 'ok',
+    outputShape: 'text',
+  }
+  expect(agentVisual(a)).toEqual({
+    mark: '✓',
+    color: 'success',
+    suffix: 'text',
+  })
+})
+
+test('agentVisual：dead → ✗ error dead', () => {
+  const a: AgentProgress = { id: 1, status: 'done', resultKind: 'dead' }
+  expect(agentVisual(a)).toEqual({ mark: '✗', color: 'error', suffix: 'dead' })
+})