fix(spec): check:skill-examples refuses instead of degrading when a marked example does not parse

content/docs/api/error-handling-client.mdx

@@ -132,7 +132,7 @@ async function parseApiError(response: Response): Promise<ObjectStackError> {
 
 Map field-level errors from the API response directly to form fields:
 
-```typescript
+```tsx
 import { useState } from 'react';
 
 interface FormErrors {
@@ -304,7 +304,7 @@ function sleep(ms: number): Promise<void> {
 
 Catch unexpected errors at the component tree level:
 
-```typescript
+```tsx
 import { Component, type ReactNode } from 'react';
 
 interface ErrorBoundaryState {

content/docs/protocol/objectui/concept.mdx

@@ -345,7 +345,7 @@ Authorization: Bearer <token>
 ```
 
 **Renderer Logic (Simplified):**
-```typescript
+```tsx
 function FormRenderer({ layout }) {
  return (
  <Form title={layout.title}>
@@ -644,7 +644,7 @@ A conformant ObjectUI renderer must:
 
 Renderers maintain a mapping from JSON types to components:
 
-```typescript
+```tsx
 const componentRegistry = {
  text: TextFieldComponent,
  email: EmailFieldComponent,

content/docs/protocol/objectui/index.mdx

@@ -315,7 +315,7 @@ Dashboard.create({
 
 ### 1. Declarative Over Imperative
 
-```typescript
+```tsx
 // ❌ Imperative (React)
 function TaskList() {
  const [tasks, setTasks] = useState([]);