release: FL 2.0 前端候选（流程线停发/发起页指派预览/测试夹具）

配套 service 候选 500a9a2：
- flow.ts 增加 admin/def/offlineLine、enableLine（T03 线级停发/恢复）
- Defs.vue 接线级停发开关与状态展示；lineOffline.ts 收敛判定与文案
- AssignPreview.vue + assignEmbed.ts 发起时指派预览（T02 契约）
- def-editor 表单坐标绑定微调
- 新增 vitest 组件测试与 line-offline 契约测试（npm test 可跑）

package.json

@@ -12,7 +12,11 @@
         "build:ld": "vite build --mode ld",
         "build:prod": "vite build --mode prod",
         "preview": "vite preview",
-        "api:gen": "alova gen -f"
+        "api:gen": "alova gen -f",
+        "typecheck": "vue-tsc --noEmit",
+        "test:line-offline": "esbuild tests/line-offline.test.ts --bundle --platform=node --format=esm --target=node20 --external:node:* --outfile=node_modules/.cache/line-offline.test.mjs && node node_modules/.cache/line-offline.test.mjs",
+        "test:component": "vitest run",
+        "test": "npm run test:line-offline && npm run test:component"
     },
     "dependencies": {
         "@open-file-viewer/core": "^0.1.43",
@@ -40,13 +44,16 @@
         "@unocss/preset-rem-to-px": "^66.6.0",
         "@unocss/preset-uno": "^66.6.0",
         "@vitejs/plugin-vue": "^5.0.4",
+        "@vue/test-utils": "2.4.6",
         "fast-glob": "^3.3.2",
+        "jsdom": "25.0.1",
         "typescript": "^5.2.2",
         "unocss": "^66.6.0",
         "unplugin-auto-import": "0.18.3",
         "vite": "^5.1.4",
         "vite-plugin-html": "^3.2.2",
         "vite-plugin-svg-icons": "^2.0.1",
-        "vue-tsc": "^1.8.27"
+        "vitest": "2.1.9",
+        "vue-tsc": "3.3.13"
     }
 }