after upgrade, I can't load session I was working on.

after upgrade, I can't load session I was working on. retry, restart, resume none of them working.

please make it never fail, it is fine to lose some history but making it to lose whole session doesn't make sense when there are a lot work in progress there.

it shouldn't fail fast. it doesn't make sense to lose whole session just because it couldn't figure out some small stuff.

---
| Field | Value |
| --- | --- |
| App version | 1.1.9 |
| OS | Windows 10.0.26200 |
| Theme | Notionish |
| Path | /chat |
| Tenure | Week 6 |

Start by reproducing the failure on app version 1.1.9 on Windows 10.0.26200 at the /chat path, trying retry, restart, and resume on the affected session. Done means an upgrade-related session-loading failure no longer discards the whole session, while any unrecoverable history loss is handled without failing fast.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.