**Related issue:** Resolves#48528
This keys the count, pagination, and the frontend row-combining on the
app's slug token (the prefix before `/`, shared across an app's platform
entries but distinct across apps). The count now equals the rows shown
in every view (macOS, Windows, All), and name-colliding apps stay as
separate rows.
# Checklist for submitter
- [x] Input data is properly validated, `SELECT *` is avoided, SQL
injection is prevented (using placeholders for values in statements), JS
inline code is prevented especially for url redirects, and untrusted
data interpolated into shell scripts/commands is validated against shell
metacharacters.
## Testing
- [x] Added/updated automated tests
- [x] QA'd all new/changed functionality manually
For unreleased bug fixes in a release candidate, one of:
- [x] Confirmed that the fix is not expected to adversely impact load
test results
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Software listings now group platform-specific installers into a single
app row based on the app identifier, improving how macOS and Windows
entries appear together.
* **Bug Fixes**
* Apps with the same display name but different identifiers now stay
separate instead of being merged incorrectly.
* List counts and pagination now match the combined app view more
accurately across the software pages.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Carlo