fix(javascript): retain fresh function and class target identity

Recognize stable local function, undecorated class and RegExp targets before
widening intrinsic mutations. Keep decorated classes opaque because their
binding value can be replaced, and preserve class-initialization writes.
Cover fresh targets and replacement decorators in inert CLI/MCP fixtures.

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>
Co-authored-by: Kaoru0822 <[email protected]>

src/domain/javascript/javascriptModuleInterop.ts

@@ -142,7 +142,13 @@ export const createSemanticModuleInterop = (
     let current = node;
     for (;;) {
       current = unwrapJavaScriptExpression(current).node;
-      if (t.isObjectExpression(current) || t.isArrayExpression(current))
+      if (
+        t.isObjectExpression(current) ||
+        t.isArrayExpression(current) ||
+        t.isFunction(current) ||
+        (t.isClass(current) && !current.decorators?.length) ||
+        t.isRegExpLiteral(current)
+      )
         return true;
       if (!t.isIdentifier(current)) return false;
       const binding = resolveSemanticBindingState(state, current, current.name);