First-pass slug test: try punctuation and locale cases

Before using a Slug Generator for a batch, test harmless titles with spaces, punctuation, accents, Turkish case behavior, and an empty result after normalization. Inspect the output and verify uniqueness rules. Do not assume a readable slug is a safe identifier in every route; reserved words and collisions still need checks. Once the policy is clear, apply it to the real titles and review exceptions manually. Keep existing slugs stable unless a redirect plan exists.