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/package.json

@@ -0,0 +1,30 @@
+{
+  "name": "@gyxx/dsh-plugin-gyxx-workbench",
+  "version": "0.1.0",
+  "private": true,
+  "description": "GYXX 智能工作台：把 gyxx-flow 工作流暴露为 deepseek-harness 智能体工具与侧边栏面板",
+  "type": "module",
+  "main": "gyxx-workbench.mjs",
+  "exports": {
+    ".": "./gyxx-workbench.mjs",
+    "./client": "./lib/client.js",
+    "./package.json": "./package.json"
+  },
+  "dsh": {
+    "client": {
+      "platform": "web",
+      "inject": [
+        "@deepseek-ai/dsh-client-ui-renderer",
+        "@deepseek-ai/dsh-client-ui-layout",
+        "@deepseek-ai/dsh-client-locale"
+      ]
+    }
+  },
+  "scripts": {
+    "build": "node scripts/build-client.mjs",
+    "test": "node --test \"tests/**/*.test.mjs\""
+  },
+  "devDependencies": {
+    "esbuild": "^0.24.0"
+  }
+}