feat: add upload and delete option for releases

apps/products/admin.py

@@ -55,6 +55,7 @@ class SubProductVersionInline(admin.TabularInline):
     extra = 0
     ordering = ("order", "version")
     fields = RELEASE_VERSION_INLINE_FIELDS
+    show_change_link = True
 
 
 class MainProductVersionInline(admin.TabularInline):
@@ -63,6 +64,7 @@ class MainProductVersionInline(admin.TabularInline):
     extra = 0
     ordering = ("order", "version")
     fields = RELEASE_VERSION_INLINE_FIELDS
+    show_change_link = True
 
 
 class SubProductInline(admin.StackedInline):
@@ -208,12 +210,21 @@ class SubProductVersionAdmin(admin.ModelAdmin):
         (
             "Installable downloads",
             {
+                "description": (
+                    "For each platform, set an external URL, upload a file, both, or neither. "
+                    "When a URL is set it is used on the site; otherwise an uploaded file is served. "
+                    "To delete an uploaded file from the server, open this release, check Clear next to the file, and Save."
+                ),
                 "fields": (
                     "windows_download_url",
+                    "windows_download_file",
                     "macos_download_url",
+                    "macos_download_file",
                     "linux_download_url",
+                    "linux_download_file",
                     "source_code_url",
-                )
+                    "source_code_file",
+                ),
             },
         ),
         ("Package link", {"fields": ("package_resource_url",)}),