Fix debug assertion failure in move to file refactor for React components

src/services/refactors/helpers.ts

@@ -80,7 +80,7 @@ export function addTargetFileImports(
         if (checker.isUnknownSymbol(targetSymbol)) {
             importAdder.addVerbatimImport(Debug.checkDefined(declaration ?? findAncestor(symbol.declarations?.[0], isAnyImportOrRequireStatement)));
         }
-        else if (targetSymbol.parent === undefined) {
+        else if (targetSymbol.parent === undefined && (targetSymbol.flags & SymbolFlags.Module)) {
             Debug.assert(declaration !== undefined, "expected module symbol to have a declaration");
             importAdder.addImportForModuleSymbol(symbol, isValidTypeOnlyUseSite, declaration);
         }

tests/cases/fourslash/moveToNewFileSymbolWithoutParent.ts

@@ -0,0 +1,20 @@
+/// <reference path='fourslash.ts'/>
+
+// Test for move to new file with symbols that don't have a parent but aren't modules
+// This reproduces the scenario that caused the debug assertion failure
+
+// @Filename: /a.ts
+////export const someVar = 42;
+////[|export const anotherVar = 24;|]
+
+verify.moveToNewFile({
+    newFileContents: {
+        "/a.ts":
+`export const someVar = 42;
+`,
+
+        "/anotherVar.ts":
+`export const anotherVar = 24;
+`,
+    },
+});