Error: Can't find stylesheet to import with @forward and @use variable precedence

Goal

Determine which variable value is ultimately used when a module forwards a variable that is also defined in the importing module, and whether the implementation honors the documented rule that @forward should not expose locally defined variables.

Constraints

• Testing in Dart Sass 1.71 and Ruby Sass 3.7.
• Modules may define identical variable names, optionally using as aliasing.
• Both @use and @forward are employed in the same project.

Unresolved Questions

1. When a variable is defined in the importing module and also forwarded from an imported module, does the importing module’s definition always shadow the forwarded one?
2. Does using the as keyword with @forward alter the shadowing behavior, especially when an alias conflicts with a local variable?
3. Is the error message for a missing stylesheet still the same when @forward is involved, or does it change based on module resolution order?