# Hosting: Cascade Delete HostedSite → Store

## Problem

Deleting a HostedSite leaves the associated Store orphaned in the database. The Store's subdomain remains taken, so creating a new site with the same prospect/business fails with "slug already exists".

## Root Cause

- `hosted_site_service.delete()` does a hard delete on the HostedSite only
- The Store (created by `hosted_site_service.create()`) is not deleted
- `stores.subdomain` has a partial unique index (`WHERE deleted_at IS NULL`)
- The orphaned Store is still active → subdomain collision on re-create

## Recommendation

When deleting a HostedSite, also delete the associated Store:

```python
def delete(self, db: Session, site_id: int) -> bool:
    site = self.get_by_id(db, site_id)
    store = site.store
    db.delete(site)
    if store:
        # Soft-delete or hard-delete the store created for this site
        soft_delete(store)  # or db.delete(store)
    db.flush()
```

### Considerations

- **Soft vs hard delete**: If using soft-delete, the subdomain gets freed (partial unique index filters `deleted_at IS NULL`). If hard-deleting, cascade will also remove StorePlatform, ContentPages, StoreTheme, etc.
- **CMS content**: Deleting the Store cascades to ContentPages (created by POC builder) — this is desired since the POC content belongs to that store
- **Merchant**: The merchant created from the prospect should NOT be deleted — it may be used by other stores or relinked later
- **Safety**: Only delete stores that were created by the hosting module (check if store has a HostedSite backref). Don't delete stores that existed independently.

## Files to modify

| File | Change |
|---|---|
| `hosting/services/hosted_site_service.py` | Update `delete()` to also soft-delete/hard-delete the associated Store |
| `hosting/tests/unit/test_hosted_site_service.py` | Update delete test to verify Store is also deleted |

## Quick workaround (for now)

Manually delete the orphaned store from the DB:
```sql
DELETE FROM stores WHERE subdomain = 'batirenovation-strasbourg' AND id NOT IN (SELECT store_id FROM hosted_sites);
```