Crash: @Ghost on a nested class gives "Sort mismatch ... supplied sort is Outer$Bag" #467

Impact: any @Ghost declared on a nested class crashes verification of every refinement that uses it; the same class at top level verifies.

Minimal reproducer

import liquidjava.specification.Ghost;
import liquidjava.specification.Refinement;
import liquidjava.specification.StateRefinement;

public class Outer {
    @Ghost("int size")
    static class Bag {
        @StateRefinement(to = "size(this) == 0")
        public Bag() {}

        @StateRefinement(to = "size(this) == size(old(this)) + 1")
        public void add() {}

        @StateRefinement(from = "size(this) > 0")
        public void remove() {}
    }

    static void ok() {
        Bag b = new Bag();
        b.add();
        b.remove();
    }
}

Expected: Correct! Passed Verification., as for the same Bag as a top-level class.

Actual (main @ 0053074):

Error: Sort mismatch at argument #1 for function (declare-fun Outer$Bag.size (Outer.Bag) Int) supplied sort is Outer$Bag
 9 |         public Bag() {}
10 | 
11 |         @StateRefinement(to = "size(this) == size(old(this)) + 1")
   |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
12 |         public void add() {}
13 | 

Error: Sort mismatch at argument #1 for function (declare-fun Outer$Bag.size (Outer.Bag) Int) supplied sort is Outer$Bag
12 |         public void add() {}
13 | 
14 |         @StateRefinement(from = "size(this) > 0")
   |                                  ^^^^^^^^^^^^^^
15 |         public void remove() {}
16 |     }

Cause. The two sides name the class's Z3 sort differently. TranslatorContextToZ3.addGhostFunction builds the ghost's domain from CtTypeReference.toString() (Outer.Bag), while TranslatorContextToZ3.getExpr builds the sort of this from getQualifiedName() (Outer$Bag). For a top-level class both are the same string. Using one naming for both (e.g. getQualifiedName() in addGhostFunction and getSort) should fix it.

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