# Description of Changes
In SaaS mode the self-hosted "Update Available" notification could still
appear and the update-check code (external call to
`supabase.stirling.com/functions/v1/updates`) still ran, even though the
cloud owns app versioning. The web `UpdateStartupPopup` was already
SaaS-gated via a null override, but two other paths were not:
- **Desktop app in SaaS connection mode** - `useDesktopUpdatePopup()`
ran its startup check and rendered the `UpdateModal` regardless of
connection mode, so a self-hosted update popup appeared while connected
to SaaS.
- **Settings → General** - the core `GeneralSection` fired
`checkForUpdate()` on mount unconditionally, even when the update
section was hidden (as SaaS does), so the external call still ran.
**What changed**
- `useDesktopUpdatePopup.ts` - the startup timer now bails out
immediately when `connectionModeService.getCurrentMode() === "saas"`. No
mode lookup, no external fetch, no modal.
- `core/GeneralSection.tsx` - the mount `checkForUpdate()` now returns
early when `hideUpdateSection` is set, so hiding the section (web SaaS,
managed-disabled desktop) also stops the external call.
- `desktop/GeneralSection.tsx` - passes `hideUpdateSection` when
`useSaaSMode()` is true, which (via the above) suppresses the settings
check in desktop-SaaS too.
**Why** - in SaaS the update check should never be called and no update
notification should be shown; the cloud handles versioning.
---
## Checklist
### General
- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [x] I have performed a self-review of my own code
- [x] My changes generate no new warnings
### Documentation
- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)
### Translations (if applicable)
- [ ] I ran
[`scripts/counter_translation.py`](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/docs/counter_translation.md)
### UI Changes (if applicable)
- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)
### Testing (if applicable)
- [x] I have run `task check` to verify linters, typechecks, and tests
pass
- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#7-testing)
for more details.
