fix(isolated-declarations): cannot infer nested as const (#3807)

crates/oxc_isolated_declarations/src/types.rs

@@ -205,6 +205,13 @@ impl<'a> IsolatedDeclarations<'a> {
             Expression::ArrowFunctionExpression(func) => {
                 self.transform_arrow_function_to_ts_type(func)
             }
+            Expression::TSAsExpression(expr) => {
+                if expr.type_annotation.is_const_type_reference() {
+                    self.transform_expression_to_ts_type(&expr.expression)
+                } else {
+                    Some(self.ast.copy(&expr.type_annotation))
+                }
+            }
             _ => None,
         }
     }