feat: add deepseek-harness workbench plugin and console diagnosis API

- console: GET /api/workflows/{id}, /runs/{run_id}, /runs/{run_id}/diagnosis
  (journal trace + sanitized bounded log tails, workflow/run pairing enforced)
- workbench/: dsh 宿主插件（7 个工作流工具、中文系统提示词、失败监控器、
  本机回环桥接服务）+ 侧边栏面板客户端包（sidebar.footer.action 与
  shell.overlay 追加插槽）+ 降级独立面板 + 一键启动脚本
- adapters/browser: 收敛 looks_like_login_url 到共享层，修复
  jd_main_image_collector 对 gyxx_flow.accounts 的越层导入
- tests: 新端点覆盖；replay_policy 断言对齐已迁移的 catalog（repeatable）

workbench/plugin/client/src/store.js

@@ -0,0 +1,57 @@
+/**
+ * GYXX 工作台面板 —— 极简外部存储（避免向客户端包引入额外依赖）。
+ * React 18 的 useSyncExternalStore 直接订阅。
+ */
+
+const listeners = new Set()
+
+let state = {
+  open: false,
+  loading: false,
+  error: null,
+  generatedAt: null,
+  summary: null,
+  workflows: [],
+  selectedId: null,
+  detail: null,
+  detailLoading: false,
+  runs: [],
+  diagnosis: null,
+  diagnosisLoading: false,
+  question: '',
+  businessDate: defaultBusinessDate(),
+  alerts: [],
+  seenAlertIds: {},
+  toasts: [],
+}
+
+export function defaultBusinessDate() {
+  const now = new Date()
+  now.setDate(now.getDate() - 1)
+  const pad = (value) => String(value).padStart(2, '0')
+  return `${now.getFullYear()}-${pad(now.getMonth() + 1)}-${pad(now.getDate())}`
+}
+
+export function getState() {
+  return state
+}
+
+export function update(patch) {
+  state = { ...state, ...patch }
+  for (const listener of listeners) listener()
+}
+
+export function subscribe(listener) {
+  listeners.add(listener)
+  return () => listeners.delete(listener)
+}
+
+export function pushToast(toast) {
+  const id = `t-${Date.now().toString(36)}-${Math.random().toString(36).slice(2, 6)}`
+  update({ toasts: [...state.toasts, { id, ...toast }] })
+  return id
+}
+
+export function dismissToast(id) {
+  update({ toasts: state.toasts.filter((toast) => toast.id !== id) })
+}