验证(08-10-pwa-cross-version-cache-upgrade-validation): 固化PWA跨版本升级回归

.trellis/tasks/08-10-pwa-cross-version-cache-upgrade-validation/task.json

@@ -0,0 +1,33 @@
+{
+  "id": "pwa-cross-version-cache-upgrade-validation",
+  "name": "pwa-cross-version-cache-upgrade-validation",
+  "title": "PWA 跨版本缓存升级验证",
+  "description": "在同一 loopback origin 与同一浏览器上下文中，让旧 production build 的真实 Service Worker 先取得控制权并建立缓存，再原位切换新 build，验证重访后无需强刷即可收敛到新 shell、保持会话且不残留旧 chunk。",
+  "status": "in_progress",
+  "dev_type": null,
+  "scope": "client PWA production-build cross-version upgrade test harness and local QA runner; product PWA runtime remains read-only unless a separate finding task is approved",
+  "package": null,
+  "priority": "P2",
+  "creator": "shunli",
+  "assignee": "shunli",
+  "createdAt": "2026-08-10",
+  "completedAt": null,
+  "branch": null,
+  "base_branch": "main",
+  "worktree_path": null,
+  "commit": null,
+  "pr_url": null,
+  "subtasks": [],
+  "children": [],
+  "parent": null,
+  "relatedFiles": [
+    "client/vite.config.ts",
+    "client/src/pwa.ts",
+    "client/tests/e2e/login-portal-ux.spec.ts",
+    "client/tests/e2e/pwa-cross-version-upgrade.spec.ts",
+    "scripts/qa/run-pwa-cross-version-upgrade.sh",
+    ".trellis/spec/hyb-oa/frontend-react-vite-design.md"
+  ],
+  "notes": "本地同 origin、同 BrowserContext 的 production PWA A→B 跨版本 witness 三次 PASS；A controller/precache、B active worker 指纹/document/chunk、会话保持与旧缓存清理均有联合证据，未连接生产或修改产品 PWA runtime。",
+  "meta": {}
+}