[BUG]: Enhanced Validation Missing in GatewayCreate

[crivetimihai]

Issue: Enhanced Validation Missing in GatewayCreate

Description: The enhanced validation for multi-headers (header key format validation and 100-header limit) is only implemented in GatewayUpdate but missing in GatewayCreate.

Current State:

• GatewayUpdate has comprehensive validation (lines 2084-2126 in mcpgateway/schemas.py)
• GatewayCreate has basic validation (lines 1901-1918 in mcpgateway/schemas.py)

Impact:

• Users can create gateways with invalid header keys via create endpoint
• Users can create gateways with >100 headers via create endpoint
• Inconsistent behavior between create and update operations

Fix Required:

1. Copy enhanced validation logic from GatewayUpdate._process_auth_fields() to GatewayCreate._process_auth_fields()
2. Add header key format validation: if not all(c.isalnum() or c in "-_" for c in key.replace(" ", ""))
3. Add excessive headers check: if len(header_dict) > 100
4. Add duplicate key warning with logging

Files to Modify:

• mcpgateway/schemas.py (lines 1904-1909)

Test Coverage:

• Add test cases to tests/unit/mcpgateway/test_multi_auth_headers.py for:
  • Invalid header key format in create
  • Excessive headers (>100) in create
  • Duplicate key handling in create

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Priority: VERY LOW - UI/UX Polish

Issue: JavaScript Console Errors

Description: Minor JavaScript issues in admin interface.

Files: mcpgateway/static/admin.js

• Line 6432: Changed showNotification to console.error - consider implementing proper notification system
• Consider adding user-friendly error messages for header validation failures

Impact: Very Low - functionality works, just less polished UX
Action: Implement proper notification system for admin UI