fix: .env.example inline comments parsed as values, remove unused fireEvent import

- Moved inline comments on SUPABASE_JWT_SECRET and SUPABASE_SERVICE_ROLE_KEY
  to their own lines above the values. python-dotenv parses everything after
  the = sign including inline comments when values are unquoted.
- Removed unused fireEvent import from ErrorBoundary.test.tsx

Author: DevanshuNEU

.env.example

@@ -19,8 +19,10 @@ PINECONE_INDEX_NAME=codeintel
 # Get from: https://app.supabase.com/project/_/settings/api
 SUPABASE_URL=https://your-project.supabase.co
 SUPABASE_ANON_KEY=eyJ...
-SUPABASE_JWT_SECRET=your-jwt-secret  # From Project Settings -> API -> JWT Secret
-SUPABASE_SERVICE_ROLE_KEY=eyJ...  # From Project Settings -> API -> service_role key
+# From Project Settings -> API -> JWT Secret
+SUPABASE_JWT_SECRET=your-jwt-secret
+# From Project Settings -> API -> service_role key
+SUPABASE_SERVICE_ROLE_KEY=eyJ...
 
 # Backend API
 API_KEY=change-this-secret-key-for-production

frontend/src/test/ErrorBoundary.test.tsx

@@ -1,6 +1,6 @@
 // smoke test: ErrorBoundary renders fallback on error, recovers on retry
 import { describe, it, expect, vi } from 'vitest'
-import { render, screen, fireEvent } from '@testing-library/react'
+import { render, screen } from '@testing-library/react'
 import { ErrorBoundary } from '@/components/ErrorBoundary'
 
 function ThrowingChild({ shouldThrow }: { shouldThrow: boolean }) {