Create comprehensive unit tests for the BaseImagesForm and BaseImagesTable components.

BaseImagesForm Tests:

• Form validation and submission
• Displays success/error alerts correctly
• Disables inputs during submission
• Error handling for all error types:
• INVALID_IMAGE_NAME (malformed image path)
• NO_VALID_INTEGRATION (no registry integration)
• SCAN_FAILED (scan error from backend)
• DUPLICATE_PATTERN (pattern already exists)
• Modal stays open after errors for retry
• Form re-enables after error
• Button spinner shows during submission

BaseImagesTable Tests:

• Renders the base images list correctly
• Remove button shows spinner on correct row
• Disables all buttons during delete operation
• Shows empty state when no base images available
• Calls removeBaseImage callback with correct name
• Displays "Added by" user information correctly

Acceptance Criteria:

• All error scenarios covered with test cases
• Loading states tested
• Remove button behavior validated
• Component prop interactions tested