Fix Next.js deployment configuration

- Fix security test to properly mock fetchFromConfluence errors
- Remove test execution from build (env vars not available in build)
- Remove standalone output for Amplify compatibility
- Platform already updated to WEB_COMPUTE via Terraform

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

__tests__/security.test.ts

@@ -43,11 +43,15 @@ describe('API Security Tests', () => {
   });
 
   it('should not expose internal error details', async () => {
-    // Set invalid environment to trigger error
-    process.env.CONFLUENCE_API_URL = 'invalid-url';
+    // Set valid environment
+    process.env.CONFLUENCE_API_URL = 'https://test.atlassian.net';
     process.env.CONFLUENCE_TOKEN = 'test-token';
     process.env.CONFLUENCE_PAGE_ID = 'test-page';
     
+    // Mock fetchFromConfluence to throw an error
+    const mockFetchFromConfluence = fetchFromConfluence as jest.MockedFunction<typeof fetchFromConfluence>;
+    mockFetchFromConfluence.mockRejectedValueOnce(new Error('Internal database error with sensitive details'));
+    
     const response = await GET();
     const data = await response.json();
     
@@ -55,5 +59,7 @@ describe('API Security Tests', () => {
     expect(data.error).toBe('Failed to fetch filaments');
     expect(data).not.toHaveProperty('stack');
     expect(data).not.toHaveProperty('message');
+    expect(JSON.stringify(data)).not.toContain('Internal database error');
+    expect(JSON.stringify(data)).not.toContain('sensitive details');
   });
 });