Functions page on self-hosted differs from Platform Adds the possibility to see function details page in Self-Host version.
## Summary by CodeRabbit
* **New Features**
* Edge function detail lookup added for self‑hosted deployments (new
retrieval endpoint & store method).
* Consistent navigation to function pages from the functions list.
* **Improvements**
* UI tabs, download, and test controls adapt to deployment type.
* Region, JWT verification, local development, and delete controls shown
only on the platform.
* Edit/save/delete controls enable/disable correctly based on deployment
and permissions.
* Function details load reliably across deployments.
Kalleby Santos
8c3655cd71