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/index.jsx

@@ -0,0 +1,71 @@
+/**
+ * GYXX 工作台客户端插件入口。
+ * 由 esbuild 打包为 CJS 并通过 window.__ModuleLoader__ 注册（见 scripts/build-client.mjs）。
+ * 运行时只依赖 dsh 平台共享模块表中的 react。
+ */
+
+import { createElement, useSyncExternalStore } from 'react'
+import { WorkflowPanel, refreshWorkflows } from './Panel.jsx'
+import { Toasts } from './Toasts.jsx'
+import { getState, subscribe, update } from './store.js'
+import stylesText from './styles.css'
+
+export const inject = ['slots']
+
+function useWorkbench() {
+  return useSyncExternalStore(subscribe, getState)
+}
+
+function injectStyles() {
+  if (typeof document === 'undefined') return
+  if (document.getElementById('gyxxwb-styles')) return
+  const style = document.createElement('style')
+  style.id = 'gyxxwb-styles'
+  style.textContent = stylesText
+  document.head.appendChild(style)
+}
+
+/** 侧边栏底部动作：工作流面板开关 + 聚合状态点。 */
+function WorkbenchFooterAction() {
+  const s = useWorkbench()
+  const failed = s.workflows.filter((w) => !w.active_run && w.last_run?.status === 'failed').length
+  const running = s.workflows.filter((w) => w.active_run).length
+  const tone = failed > 0 ? 'failed' : running > 0 ? 'running' : 'success'
+  return createElement(
+    'button',
+    {
+      type: 'button',
+      className: `gyxxwb-footer-btn${s.open ? ' gyxxwb-footer-btn-active' : ''}`,
+      title: 'GYXX 工作流工作台',
+      onClick: () => {
+        const next = !getState().open
+        update({ open: next })
+        if (next) refreshWorkflows()
+      },
+    },
+    createElement('span', { className: `gyxxwb-dot gyxxwb-dot-${tone}` }),
+    createElement('span', null, '工作流'),
+  )
+}
+
+/** 覆盖层根：左侧抽屉面板 + 失败 toast。 */
+function WorkbenchOverlay() {
+  return createElement(
+    'div',
+    { className: 'gyxxwb-overlay' },
+    createElement(WorkflowPanel, null),
+    createElement(Toasts, null),
+  )
+}
+
+export function apply(ctx) {
+  injectStyles()
+  ctx.effect(
+    () => ctx.slots.register({ name: 'sidebar.footer.action' }, WorkbenchFooterAction),
+    'gyxx-workbench: footer action',
+  )
+  ctx.effect(
+    () => ctx.slots.register({ name: 'shell.overlay' }, WorkbenchOverlay),
+    'gyxx-workbench: overlay',
+  )
+}