AI Domain Generator improvements in hPanel

Several usability improvements have been added to the AI Domain Generator in hPanel. The input field now cycles through example prompts to clarify what users should enter. A new button lets users pull fresh batches of results without re-running the entire search. Users can now see alternative extensions for any domain name directly from its card, filter results by specific TLDs (.com, .ai, .shop, etc.), and generate similar names with one click if they find a name that's close but not quite right.