Restore Error Handling section and remove Data and API Integration section per review feedback

Co-authored-by: TechQuery <19969570+TechQuery@users.noreply.github.com>

Author: Copilot

.github/copilot-instructions.md

@@ -100,14 +100,6 @@ Based on comprehensive PR review analysis, follow these critical development sta
 - Use utilities from established libraries: 'web-utility'
 - Import `'./Base'` in model files for proper configuration
 
-#### Data and API Integration
-
-- Use **GitHub API** with ContentModel from mobx-github for content management
-- Use configured `githubClient` from `models/Base.ts` for authenticated API calls
-- **Base64 decode** content from GitHub API responses: `atob(item.content)`
-- Replace filesystem reading with GitHub Contents API calls
-- Use `ContentModel('owner', 'repo')` pattern for repository content access
-
 #### Error Handling and Static Generation
 
 - **Natural error throwing** for static generation - let errors bubble up to catch build issues
@@ -118,9 +110,20 @@ Based on comprehensive PR review analysis, follow these critical development sta
 
 #### Component Usage Patterns
 
-- **ALWAYS use React Bootstrap components** instead of custom HTML elements
-- Use utilities from established libraries: 'web-utility'
-- Import from existing configured clients: use `githubClient` from `models/Base.ts`
+```typescript
+// ✅ Correct - use React Bootstrap components
+import { Button, Badge, Breadcrumb, Card, Container } from 'react-bootstrap';
+
+<Button variant="outline-primary" size="sm" href={url} target="_blank">
+  {t('edit_on_github')}
+</Button>
+
+<Badge bg="secondary">{label}</Badge>
+
+// ❌ Wrong - custom HTML elements
+<a href={url} className="btn btn-outline-primary">Edit</a>
+<span className="badge bg-secondary">{label}</span>
+```
 
 #### Semantic HTML Structure