vanshaj2023 opened a new issue, #3344:
URL: https://github.com/apache/apisix-dashboard/issues/3344
### Issue description
On detail/edit pages (Upstreams, Routes, Services, etc.), clicking
**Cancel** silently discards all unsaved form changes with no warning. Users
can lose edits without realizing it.
**Root cause**
The Cancel button calls `setReadOnly(true)` directly with no unsaved changes
check:
```ts
<Button variant="outline" onClick={() => setReadOnly(true)}>
{t('form.btn.cancel')}
</Button>
```
### Expected behavior
A confirmation dialog should appear when the user has unsaved changes,
consistent with the plugin editor drawer which was fixed in #3333 .
### How to Reproduce
1. Go to Upstreams → open any upstream → click **Edit**
2. Make changes to any field
3. Click **Cancel**
4. All changes are silently discarded, no confirmation dialog
### Screenshots
_No response_
### Environment
apisix-dashboard: master
### Additional context
## Affected pages
1. Upstreams (`upstreams/detail.$id.tsx`)
2. Routes (`routes/detail.$id.tsx`)
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