grandfather users (#4984)

# Description of Changes

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- Why the change was made
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Closes #(issue_number)
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## Checklist

### General

- [ ] 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/devGuide/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)
- [ ] I have performed a self-review of my own code
- [ ] 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)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

---------

Co-authored-by: ConnorYoh <40631091+ConnorYoh@users.noreply.github.com>
Co-authored-by: Dario Ghunney Ware <dariogware@gmail.com>

frontend/src/proprietary/services/licenseService.ts

@@ -70,7 +70,7 @@ export interface LicenseKeyResponse {
 }
 
 export interface LicenseInfo {
-  licenseType: 'NORMAL' | 'PRO' | 'ENTERPRISE';
+  licenseType: 'NORMAL' | 'SERVER' | 'ENTERPRISE';
   enabled: boolean;
   maxUsers: number;
   hasKey: boolean;
@@ -496,8 +496,8 @@ export const mapLicenseToTier = (licenseInfo: LicenseInfo | null): 'free' | 'ser
     return 'free';
   }
 
-  // PRO type (no seats) = Server tier
-  if (licenseInfo.licenseType === 'PRO') {
+  // SERVER type (unlimited users) = Server tier
+  if (licenseInfo.licenseType === 'SERVER') {
     return 'server';
   }