Add content_languages filter; vendor index SQL to drop cdx_toolkit dependency

Report actual job cost on completion + link to target bucket

Handle empty / zero-match index query gracefully

UI: drop Check-bucket button, align path field, gate Cancel on running job

Target bucket: dropdown of writable buckets instead of free-text

Read CC index via HF CDN (no bucket mount) + add Cancel Job button

Add CC WARC repackaging Space (Gradio + HF Jobs + cdx_toolkit)