🩹(backend) enhance Django Admin for Team Slug

Make Team's Slug field non-editable in the Django admin. It avoid
UX issues by preventing accidental slug overwrites during updates.
The Slug is now displayed in the teams list view.

src/backend/core/admin.py

@@ -105,8 +105,8 @@ class TeamAdmin(admin.ModelAdmin):
     inlines = (TeamAccessInline,)
     list_display = (
         "name",
+        "slug",
         "created_at",
         "updated_at",
     )
-    prepopulated_fields = {"slug": ("name",)}
     search_fields = ("name",)

src/backend/core/models.py

@@ -316,7 +316,7 @@ class Team(BaseModel):
     """
 
     name = models.CharField(max_length=100)
-    slug = models.SlugField(max_length=100, unique=True, null=False)
+    slug = models.SlugField(max_length=100, unique=True, null=False, editable=False)
 
     users = models.ManyToManyField(
         User,