- Make source_url optional and add source_content to the request; the
two are normalized into a source kind ("url" | "content"), URL wins
when both are present, and missing both returns source_required
- Skip web fetching in the generation worker when pasted content is
provided; truncate it to the same 24,000-rune cap
- Label untitled pasted-content jobs with a locale-aware display title
and mark the source kind in wizard state and prompt metadata
- Cover source normalization, truncation, and display title with tests
