fix: add languages.typescript to Monaco mocks for intellisense tests

The CollaborativeMonaco component now uses monaco.languages.typescript
for compiler options. Updated both the global mock at test/__mocks__/
monaco-editor.ts and the local mock in CollaborativeMonaco.diff.test.tsx.

Author: elias-ba

assets/test/__mocks__/monaco-editor.ts

@@ -21,6 +21,16 @@ export const editor = {
   setModelLanguage: () => {},
 };
 
+export const languages = {
+  typescript: {
+    javascriptDefaults: {
+      setCompilerOptions: () => {},
+      setExtraLibs: () => {},
+    },
+  },
+  registerCompletionItemProvider: () => ({ dispose: () => {} }),
+};
+
 export const KeyMod = {
   CtrlCmd: 1,
   Shift: 2,
@@ -38,6 +48,7 @@ export const KeyCode = {
 // Export as default and named exports to match monaco-editor package
 export default {
   editor,
+  languages,
   KeyMod,
   KeyCode,
 };

assets/test/collaborative-editor/components/CollaborativeMonaco.diff.test.tsx

@@ -78,6 +78,15 @@ vi.mock('../../../js/monaco', () => ({
         })),
         createModel: vi.fn(code => ({ code, dispose: vi.fn() })),
       },
+      languages: {
+        typescript: {
+          javascriptDefaults: {
+            setCompilerOptions: vi.fn(),
+            setExtraLibs: vi.fn(),
+          },
+        },
+        registerCompletionItemProvider: vi.fn(() => ({ dispose: vi.fn() })),
+      },
       KeyMod: {
         CtrlCmd: 1,
         Shift: 2,