feat(e2e): Playwright E2E 前端测试基建 — 后端合成数据 mock 模式 + 5 用例 + CI

- web/e2e_mock.py：EASY_TDX_E2E_MOCK=1 时 lifespan 替换 TDX/MAC 客户端为
  确定性合成数据（CRC32 播种随机游走，分页语义对齐真实 /bars）；回测/WF/
  评估/自选/策略库仍走真实后端，SSE 由 QuoteStreamer 真轮询（mock 下 2s 一拍）
- web-ui：@playwright/test + playwright.config.ts（webServer 自动起 serve，
  EASY_TDX_CONFIG_DIR 指向每轮临时目录）；e2e/ 5 用例覆盖看板五指数/SSE、
  自选增删、回测全流程、附加分析（WF 柱状图+一条龙评估卡）、策略库保存
- package.json 加 test:e2e；CI frontend job 追加 E2E；verify_ci.sh 补前端段
- tests/unit/test_e2e_mock.py（11 例）守护 mock 契约；本地 npx playwright test 全绿

web-ui/package-lock.json

@@ -14,6 +14,7 @@
         "vue-router": "^4.6.4"
       },
       "devDependencies": {
+        "@playwright/test": "^1.62.1",
         "@types/node": "^24.13.2",
         "@vitejs/plugin-vue": "^6.0.7",
         "@vue/tsconfig": "^0.9.1",
@@ -137,6 +138,22 @@
         "url": "https://github.com/sponsors/Boshen"
       }
     },
+    "node_modules/@playwright/test": {
+      "version": "1.62.1",
+      "resolved": "https://registry.npmjs.org/@playwright/test/-/test-1.62.1.tgz",
+      "integrity": "sha512-DTcUc8qii+cpHvtOwggMtBRMjKZHXYWdw8syRYu2vtzuq4Wxphqq4NfCs5Zt44L6mA8rfDfj+PHnxFc/FeK6mQ==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "playwright": "1.62.1"
+      },
+      "bin": {
+        "playwright": "cli.js"
+      },
+      "engines": {
+        "node": ">=20"
+      }
+    },
     "node_modules/@rolldown/binding-android-arm64": {
       "version": "1.1.4",
       "resolved": "https://registry.npmjs.org/@rolldown/binding-android-arm64/-/binding-android-arm64-1.1.4.tgz",
@@ -1122,6 +1139,53 @@
         }
       }
     },
+    "node_modules/playwright": {
+      "version": "1.62.1",
+      "resolved": "https://registry.npmjs.org/playwright/-/playwright-1.62.1.tgz",
+      "integrity": "sha512-0M+L3LAD8/nm554LOla9Ayx0j0tmFZ0FBcoQ7F1VuVHpM/XpiC8RcDzBQB8W5+hA8L22THxELzeF+2WcUzvcLg==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "playwright-core": "1.62.1"
+      },
+      "bin": {
+        "playwright": "cli.js"
+      },
+      "engines": {
+        "node": ">=20"
+      },
+      "optionalDependencies": {
+        "fsevents": "2.3.2"
+      }
+    },
+    "node_modules/playwright-core": {
+      "version": "1.62.1",
+      "resolved": "https://registry.npmjs.org/playwright-core/-/playwright-core-1.62.1.tgz",
+      "integrity": "sha512-wPYSwEBJY9GHraISXqyqtx0na0LpO3XEX7jNDhntbex7tzUS7kLnZsOlFruFJB4Hi/rhDMjXGqHewDZ68nYZVw==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "playwright-core": "cli.js"
+      },
+      "engines": {
+        "node": ">=20"
+      }
+    },
+    "node_modules/playwright/node_modules/fsevents": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.2.tgz",
+      "integrity": "sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA==",
+      "dev": true,
+      "hasInstallScript": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": "^8.16.0 || ^10.6.0 || >=11.0.0"
+      }
+    },
     "node_modules/postcss": {
       "version": "8.5.26",
       "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.26.tgz",