bug: project settings form does not auto-convert project name to url safe names

[elias-ba]

Description

The project settings form rejects project names containing uppercase characters or spaces (e.g., "DEP-burundi-datafi") with an "invalid format" error, while the project creation form accepts them by auto-converting to the url-safe format (dep-burundi-datafi).

This inconsistency makes it appear as a bug to users — they can create a project with a mixed-case name but cannot rename an existing project the same way.

Expected behavior

The settings form should auto-convert the name to lowercase-hyphens-digits format, matching the creation form behavior, and show a preview of the converted name.

Steps to reproduce

1. Go to an existing project's settings page
2. Try to change the project name to something with uppercase letters (e.g., "DEP-burundi-datafi")
3. Observe the validation error "has invalid format"